Month: February 2019

Why Farmonaut's Database is One of the Most Trusted Database

Farmonaut always strives to think from a farmer’s perspective to keep building the right solutions for the community. One of such steps is the development of Farmonaut Database. We have collected farming data from different government approved sources, analyzed them and refined it to bring the best formatted information available to the farmers.

The government database is a result of rigorous research of several years which includes information about what insecticide, pesticide, and/or plant growth regulator should be used for a given crop. However, the database is openly available in the format of a huge document file with hundreds of pages.  It is really unreasonable to expect a farmer to download this large document and scroll through hundreds of pages to identify what the potential problem is with their crop.

Thus, the first thing we did is to sanitize this government approved database, and present it to the farmers in a user-friendly manner.

The segregated database is accessible through our android app and contains government approved information about 100+ crops, 300+ problems and 150+ chemicals (pesticides, insecticides, plant growth regulators etc.). The database includes very specific details of chemical usage such as Quantity, Formulation (g/ml)% and Dilution in water (L).

The Farmonaut database is presented in a fairly accessible form. A farmer can simply click on whether they want to check the information about a crop, a disease/problem or a government approved chemical.

If a farmer clicks on the “Crops” button and selects a crop from the given list of 100+ crops, he/she can see what government approved solutions they should be using if a certain disease/problem outbreaks in their farming field. For example, if a farmer selects Apple from the given list of crops, the database will show that if the apple crop has the problem of scab, they can use chemicals like: Captan 50% WG, Captan 75% WP,  Copper Hydroxide 77% WP, Difenoconazole 25% EC) etc. with their specific details like Quantity, Formulation (g/ml)% and Dilution in water (L) etc.. Similarly, if the apple crop has the problem of Powdery Mildew, they can use chemicals like: Lime Sulphur 22% SC, Sulphut 80% WP etc. with their given specific details.

If a farmer clicks on the “Identified Issues” button and selects a problem/disease from the given list of 300+ problems, he/she can see what government approved solutions they should be using if that disease outbreaks in the given list of crops. For, example, if a farmer selects Black Rot from the given list of 300+ problems/diseases, the database will show that if black rot occurs in Coffee, then they can use Copper Oxychloride 50% WG with the given specific details. Similarly, if black rot occurs in Apple, then they can use Zineb 75% WP with the given specific details.

If a farmer clicks on the “Chemicals” button and selects a chemical from the given list of 150+ government approved chemicals (pesticides, insecticides, plant growth regulators etc.), he/she can see what different crops and different diseases can this chemical be used for. For example, if a farmer selects Zineb 75% WP from the given list of 150+ chemicals, they can see that Zineb 75% WP can be used in Jowar for Red Leaf Spot, Leaf Spot and Leaf Blight with the given specific details accordingly. Similarly, it will also show that Zineb 75% WP can also be in Wheat for Blight and Rust with the given specific details.

The Farmonaut database also gives a farmer an option to upvote the given government approved solution. By doing so, Farmonaut ensures another layer of trust on the provided sanitized database. Furthermore, a farmer can also share the database information on to Farmonaut Discussion Forum and several other Social media networks of their choice. A farmer can also save this information locally to his account for a quicker access through their profile.

 

 

At Farmonaut, we jumped one step ahead and added another layer of user friendliness to access our database. We have designed a system which is capable of identifying potential problems with a farmer’s crop just by their voice or text explanation. Read the following article to know in-depth about the Voice-Text Based Crop Issue Identification System.

https://farmonaut.com/blogs/farming-blogs/voice-text-based-crop-issue-identification/

The app is available for android on Google PlayStore: 

https://play.google.com/store/apps/details?id=com.farmonaut.android

We will keep posting about any such informative information on to our blogs, to help as many people as possible. Farmonaut is built upon a vision to bridge the technological gap between farmers and strives to bring state-of-the-art technologies in the hands of each and every farmer. For any queries/suggestions, please contact us at support@farmonaut.com.

We have some more interesting articles coming up soon. Stay tuned!

Wait!!

Before that…

Follow us at:

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Youtube: https://www.youtube.com/channel/UCYWOOPPKATLgh4L6YRlYFOQ

AppLink: https://play.google.com/store/apps/details?id=com.farmonaut.android

Website: https://farmonaut.com

Satellite Imagery: https://farmonaut.com/satellite-imagery

Satellite Imagery Samples: https://farmonaut.com/satellite-imagery-samples

Voice-Text Based Crop Issue Identification

In India, several thousand tonnes of crop gets destroyed every year due to incorrect usage of pesticides, insecticides, plant growth regulators etc. Whenever there is a disease outbreak in a farmer’s field, the first person whom they usually look forward to is the local vendor from whom they purchase their farming products like seeds, spraying equipments etc. In India, officially you need to have at least a certain relevant degree before you can start your own fertilizer shop. However, these norms are hardly practiced.

These local vendors have their own interest in mind, since they need to sell the products of the companies from whom they purchase the chemicals in bulk.  Thus, more often than not, with no practical scientific knowledge, they end up suggesting completely incorrect solutions to the farmer.

 

One of the major aims of Farmonaut is to help farmers figure out what the problem is with their crop, and also provide government approved solutions for the problems identified by our system. Though the government has released a scientifically approved database, however the database is highly user inaccessible. The government database is in the form of document file of hundreds of pages. It is really unreasonable to expect a farmer to download this large document and scroll through hundreds of pages to identify what the potential problem is with their crop. At Farmonaut, the first thing we did is to sanitize this government approved database, and present it to the farmers in a user-friendly form.

The segregated database is accessible through our android app and contains government approved information about 100+ crops, 300+ problems and 150+ chemicals (pesticides, insecticides, plant growth regulators etc.). The database includes very specific details of chemical usage such as Quantity, Formulation (g/ml)% and Dilution in water (L).

Read the following article to know in-depth about the Farmonaut Database:

https://farmonaut.com/blogs/farming-blogs/why-farmonaut-database-is-one-of-the-most-trusted-database/

At Farmonaut, we jumped one step ahead and added another layer of user friendliness to access our database. We have designed a system which is capable of identifying potential problems with a farmer’s crop by just their voice or text explanation.

The voice-text based crop issue identification system is available on our Android app. A farmer can simply explain what issues he/she is facing with his crop and our system in real-time will identify the potential problem with the crop as well as the government approved solutions attached with the results as well. Given the vastness of India and a large number of languages being spoken in the Indian subcontinent, we can not expect our system to work only in one specific language. Hence, we have created our system to work in more than 50 languages. The farmers can ask their problems in a language of their choice and can still get government approved solutions in real time.

The following section below shows a few examples of how Farmonaut’s voice-text based crop issue identification system works.

The Voice-text based crop issue identification system works as a chat bot, wherein farmers can ask for the solution to their problems just like someone will message another user on a messaging service. The farmer can simply type their query into the text box or can speak about their query by clicking on the speech button. Once the speech of the farmer is finished or if farmer clicks on the send button after his text information about the problem is ready, the system will process their speech/text to identify the crop as well the problem being faced by the farmer. Upon correct identification of the problem, the system will return all the government approved solutions from which the farmer can select one of his choice.

For example, in the case above, the Farmer has asked in hindi the following query:

Asked Query: आम की फसल की उपज बढ़ाने के कुछ उपाय बताइये| अभी एकदम नयी फसल है|

Our system identifies within seconds that the user is looking for ways to enhance yield of their mango crop and hence, provides all the government approved solutions to the user about chemicals measures to be used to enhance the yield of his/her mango produce.

Some other examples of the Voice-text Based Crop Issue Identification queries are listed below.

There may be times when the voice-text based crop issue identification system is not able to identify the problem properly. There are 4 such cases which we want to highlight.

Case 1:

When our system has correctly identified the crop as well as the problem being faced by the crop, the system still gives the farmer an option to post his query on to the discussion forum to further proof check about his problem from the community.

Case 2: 

When our system has correctly identified the crop of the query but not problem, the farmer can post this unsuccessful query onto the discussion forum to get remedies from the farming community itself.

Case 3:

When our system has not been able to identify both crop as well as the problem, and if the farmer feels that his/her query was correct, they can post this voice-text crop issue identification query on to the discussion forum to get remedies from the farming community.

A detailed article about the discussion forum and Farmonaut database will be available soon.

The app is available for android on Google PlayStore: 

https://play.google.com/store/apps/details?id=com.farmonaut.android

We will keep posting about any such informative information on to our blogs, to help as many people as possible. Farmonaut is built upon a vision to bridge the technological gap between farmers and strives to bring state-of-the-art technologies in the hands of each and every farmer. For any queries/suggestions, please contact us at support@farmonaut.com.

We have some more interesting articles coming up soon. Stay tuned!

Wait!!

Before that…

Follow us at:

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Tumblr: https://farmonaut.tumblr.com/

Youtube: https://www.youtube.com/channel/UCYWOOPPKATLgh4L6YRlYFOQ

AppLink: https://play.google.com/store/apps/details?id=com.farmonaut.android

Website: https://farmonaut.com

Satellite Imagery: https://farmonaut.com/satellite-imagery

Satellite Imagery Samples: https://farmonaut.com/satellite-imagery-samples

Normalized Difference Vegetation Index - NDVI

It has been quite a long time since scientists and agronomists are using Normalized Difference Vegetation Index (NDVI) to monitor and examine health of crops. The extent and benefits of NDVI have increased manifold with so many earth mapping satellites being launched every year to monitor earth’s surface in different wavelengths.

To calculated NDVI index, we need imagery from two different wavelengths, namely Near Infrared and Red band imagery. And the NDVI ratio is calculated as:

NDVI = (NIR – RED)/(NIR + RED)

From this formula, it is apparent that the density of vegetation (NDVI) at a given point in the generated image is equal to the difference in the intensities of reflected light in the red and infrared range divided by the sum of these two intensities.

 

farmonaut_ndvi2

The value of the NDVI index can range from -1.0 to 1.0. 

  • The negative NDVI values are mainly due to clouds, snow and water. 
  • The values of NDVI close to zero are mainly due to rocks and bare soil. 
  • NDVI values ranging from 0 to 0.1 correspond to sand, snow or empty areas of rocks. 
  • NDVI values ranging from 0.2 to 0.3 represent shrubs and meadows, and
  • NDVI values ranging from 0.6 to 0.8 indicate tropical and temperate forests.
In simple words, NDVI measures status of plant health based on how plants reflect light at certain frequencies. Though we cannot perceive it with our eyes, everything around us (including plants) reflect wavelengths of light in visible and non-visible spectrum. Taking into account how much amount of a certain wavelength is reflected, we can access the current status of plants. 

We know that plants have chlorophyll which absorb sunlight for photosynthesis .Chlorophyll immensely absorbs visible light (0.4 to 0.7 microns) for photosynthesis, whereas structure of cells of leaves immensely reflect near-infrared light (0.7 to 1.1 microns). If a plant is healthy, it will have large amount of chlorophyll on it’s leaves and will absorb good amount of visible light from 0.4 to 0.7 microns and reflect quite less of it and vice-versa. 

Farmonaut’s Crop Health Monitoring system is provided to farmers and monitors how much sunlight is reflected by the plants. We take into account this basic principle in identifying crop health status of an agricultural land.

For research purposes (non-farming usage), Farmonaut provides access to satellite imagery of any place around the through our android app.

For agricultural purposes, Farmonaut provides satellite based crop health monitoring system on our android app, through which farmers can select their field and identify the regions of the field at which the crop growth is not normal. Upon identifying that region of their fields, they can simply pay a visit to that part of the field and identify if the problem has already started. If it has not, the farmer can take preventive remedies by applying more fertilizers, plant growth regulators etc. If the problem has already started, they can simply explain their problem to Farmonaut’s crop issue identification system and get real-time govt. approved remedies. The satellite imagery is updated every 2-5 days and has a resolution of 10 meters which is 2 times better than google maps in rural India.

The app is available for android on Google PlayStore: 

https://play.google.com/store/apps/details?id=com.farmonaut.android

We will keep posting about any such informative information on to our blogs, to help as many people as possible. Farmonaut is built upon a vision to bridge the technological gap between farmers and strives to bring state-of-the-art technologies in the hands of each and every farmer. For any queries/suggestions, please contact us at support@farmonaut.com.

We have some more interesting articles coming up soon. Stay tuned!

Wait!!

Before that…

Follow us at:

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Instagram: https://instagram.com/farmonaut

Twitter: https://twitter.com/farmonaut

LinkedIn: https://www.linkedin.com/company/farmonaut/

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Tumblr: https://farmonaut.tumblr.com/

Youtube: https://www.youtube.com/channel/UCYWOOPPKATLgh4L6YRlYFOQ

AppLink: https://play.google.com/store/apps/details?id=com.farmonaut.android

Website: https://farmonaut.com

Satellite Imagery: https://farmonaut.com/satellite-imagery

Satellite Imagery Samples: https://farmonaut.com/satellite-imagery-samples

Aphids

Aphids basically belong to Aphidoidea Family. They are small sap-sucking  insects like greenfly and blackfly.  However, they are not harmful to crops in early stage or in small or moderate numbers. Aphid’s infest severe damage to leaves and shoots and also causes damage to plant growth.

They bring additional infections as their honeydew secrete and also transmit viruses from one plant to another over a prolonged period.

Hosts: Aphids has a vast list of plants which it affects. Few of them are Almond, apple, cabbage, cotton, garlic, grape, lettuce, maize, mango, millet etc.

They are very small in size (0.5 mm to 2 mm) and delicate bodied insects with long legs and antennae. They are found in multiple colours like brown, yellow, red or black depending on which species they belong to. They grow underside clusters of young leaves and shoot tips. They suck out fluids from the tissues with the help of their long mouth parts to tender them. 

In late spring or early summer, their invasion slows down as their population diminishes naturally due to climate change and increase in natural enemies. Several other species carry plant viruses which can lead to the development of other forms of diseases.

Biological remedies

Few predators are there which can help in controlling the population of aphids are ladybugs, lacewings, soldier beetles and parasitoid wasps. These natural killers of aphids will take care of the sucking insects in field conditions. You can use soft insecticidal soap solution or solutions depending on plant oils in case of mild infestation. Aphids are very sensitive to fungal diseases when it is humid around them. A simple spray of water can remove them from infected plants.

 

 

 

 

Chemical methods of control

Always try to consider biological treatments if available instead of approaching for chemical solutions straightaway. Stem application with flonicamid and water @ 1:20 ratio at 30, 45, 60 days after sowing (DAS) can be planned.  

Fipronil 2ml or thiamethoxam @ 0.2g or flonicamid @ 0.3g or acetamiprid @ 0.2g (per liter of water) can also be used as chemical composition in prevention against aphids.

We will keep posting about any such informative information on to our blogs, to help as many people as possible. Farmonaut is built upon a vision to bridge the technological gap between farmers and strives to bring state-of-the-art technologies in the hands of each and every farmer. For any queries/suggestions, please contact us at support@farmonaut.com.

We have some more interesting articles coming up soon. Stay tuned!

Wait!!

Before that…

Follow us at:

Facebook: https://facebook.com/farmonaut

Instagram: https://instagram.com/farmonaut

Twitter: https://twitter.com/farmonaut

LinkedIn: https://www.linkedin.com/company/farmonaut/

Pinterest: https://in.pinterest.com/farmonaut/

Tumblr: https://farmonaut.tumblr.com/

Youtube: https://www.youtube.com/channel/UCYWOOPPKATLgh4L6YRlYFOQ

AppLink: https://play.google.com/store/apps/details?id=com.farmonaut.android

Website: https://farmonaut.com

Satellite Imagery: https://farmonaut.com/satellite-imagery

Satellite Imagery Samples: https://farmonaut.com/satellite-imagery-samples

Remote Sensing Blogs

NDVI-15-feb

Normalized Difference Vegetation Index - NDVI

It has been quite a long time since scientists and agronomists are using Normalized Difference Vegetation Index (NDVI) to monitor and examine health of crops. The extent and benefits of NDVI have increased manifold with so many earth mapping satellites being launched every year to monitor earth’s surface in different wavelengths.

Since water absorbs and scatters light, oceans and lakes tend to look dark or lack detail on True color satellite images, especially in the murky waters near coastlines. Coastal Aerosol (B1) imagery allows for coastal water and ocean color observation, as it reflects blues and violets, and displays subtle differences in the color of water.

The Red Edge band is located between the Red band (B4) and the NIR band (B8), without overlap. In a typical spectral response of green vegetation, the Red Edge band covers the portion of the spectrum where reflectance drastically increases from the red towards the NIR regions.

Near Infrared images can help us identify and monitor a plant’s health. At Farmonaut, we have developed our own Crop Health Monitoring system which processes Near Infrared Imagery in combination with several other spectral images to provide a health color-map of an agricultural land.

A tsunami swept across Indonesia’s islands of Sumatra and Java the night of December 22, just before 9:30 p.m. local time. There was no notice for the wall of water, which left devastation in its wake. At least 400 are confirmed to be dead and more than 800 are injured. Because of such a large impact of this event, we wanted to analyze the extent of devastation in the coastal region of the affected areas.

To understand how the condition of lakes change over a course of a year, we shifted our focus to some of the famous lakes in India. Udaipur is known for its beautiful lakes, so we decided to analyze four famous lakes of udaipur, namely: Dudh Talai, Lake Pichola, Swaroop Sagar and, Fateh Sagar Lake.

We mapped Mount Veniaminof’s volcanic activity using the short wave infrared satellite imagery accessed through our system. Recently, Mount Veniaminof had been in the news for it’s extreme volcanic activity wherein it ended up spewing ash as high as three miles in the air. The activity was so intense, that the region near it was declared as a no-fly zone.

The spread and extent of fire in California is massive and devastating. So, we decide to have a look on the imagery of the last month. The spread and extent of fire in California is massive and devastating. So, we decide to have a look on the imagery of the last month over a region in California and have created a Time Lapse of the same.

Farmonaut provides satellite based crop health monitoring system, through which farmers can select their field and identify the regions of the field at which the crop growth is not normal. Upon identifying that region of their fields, they can simply pay a visit to that part of the field and identify if the problem has already started. If it has not, the farmer can take preventive remedies by applying more fertilizers, plant growth regulators etc. If the problem has already started, they can simply explain their problem to Farmonaut’s crop issue identification system and get real-time govt. approved remedies.

Farming Blogs

In this paper, we focus on forecasting yield of wheat based on data from Sentinel-2 satellite data. The study area
Crop growth and yield monitoring over agricultural fields is an essential procedure for food security and agricultural economic return prediction.
The following document gives a brief overview about various functions available on the Farmonaut app.
Soil organic carbon is the basis of sustainable agriculture. Farmers are interested in retaining and increasing soil organic carbon for
We are delighted to announce that we have signed a two-year MoU with STEI Foundation, Africa. STEi Foundation ( Sustainable
The Research collaboration is a 6 months long collaboration (June 2019 to November 2019) and focuses on exploring the Potential
Farmonaut's Database has government approved information about 300+ problems on 100+ crops and 150+ Chemicals (Insecticides, Pesticides, Plant Growth Regulators
Farmonaut's Voice-Text Based Crop Issue Identification System can identify 300+ problems on 100+ crops in 50+ different languages and prrovides
Spotted bollworm larvae mainly attack bolls, but also feed on squares, shoots and flowers if bolls are not present. If
The leaves affected by cotton leafhopper and jassids turn yellowish, then brownish starting from the margins and migrating to the
Black Citrus Aphid affect all citrus trees in all growth stages. The aphids have long piercing mouthparts which they use
Its primary symptoms appear during the spring as small grey or brown flecks on young fruits. As soon as summer
In the early stage of hairy caterpillars have long white hairs coming from the flanks of their body. Their main
American bollworm has been identified to attack more than 180 host plants. These host plants include beans, maize, tomato, legumes
Aphids basically belong to Aphidoidea Family. They are small sap-sucking  insects like greenfly and blackfly.  However, they are not harmful
The symptoms of Alternaria blight usually occur in summer and are depicted by the presence of angular or circular spots
Angular Leaf Spots are very easy to distinguish since the plants suffering from this develop leaf spots that follow leaf
Castor Semilooper achaea janata is widely distributed throughout India. Though castor is the principal host plant for them, it has

Plant Issues

Spotted bollworm larvae mainly attack bolls, but also feed on squares, shoots and flowers if bolls are not present. If
The leaves affected by cotton leafhopper and jassids turn yellowish, then brownish starting from the margins and migrating to the
Black Citrus Aphid affect all citrus trees in all growth stages. The aphids have long piercing mouthparts which they use
Its primary symptoms appear during the spring as small grey or brown flecks on young fruits. As soon as summer
In the early stage of hairy caterpillars have long white hairs coming from the flanks of their body. Their main
American bollworm has been identified to attack more than 180 host plants. These host plants include beans, maize, tomato, legumes
Aphids basically belong to Aphidoidea Family. They are small sap-sucking  insects like greenfly and blackfly.  However, they are not harmful
The symptoms of Alternaria blight usually occur in summer and are depicted by the presence of angular or circular spots
Angular Leaf Spots are very easy to distinguish since the plants suffering from this develop leaf spots that follow leaf
Castor Semilooper achaea janata is widely distributed throughout India. Though castor is the principal host plant for them, it has

Alternaria Blight

The symptoms of Alternaria blight usually occur in summer and are depicted by the presence of angular or circular spots of around 4 to 7 mm in diameter. In some bad cases, the spot become 3 cm in diameter.

Black lesions are also present on leaves. Leaves can wither and fall on severe infestation. Minute brown or black spots can appear on immature fruits. The spots are about 3 mm in diameter and are surrounded by a red tint on mature fruits. This infection reduces the quality of the produce. 

The symptoms arise are due to a group of three different fungi of alternaria. During favorable conditions, they come out of hibernation from the soil and produce spores that are carried by the rain or wind. Nutrient deficiency, high humidity, high temperatures, dew formation and sunny days are some of the important factors that are responsible for the development of alternaria. 

Some of the characteristics of alternaria can be confused with that of Botryosphaeria dothidea. Rub the leaves to tell if the late blight is caused by alternaria alternata or not.

Biological Remedies

Apply a paste of garlic on the leaves and fruits for biological control . You can also use solutions based on Bacillus subtilis which is found to be lethal to fungus. One should always start treatment against this disease before the fruits get ripened in the early summer.

 

 

 

 

Chemical Methods of Control

Product enriched with entities such as copper, maneb, thiophanate-methyl are found to be effective in curing alternaria. The timing of the application of the treatment, age of the tree, and the quantity of the dose determine the effectiveness of the treatment.

To promote aeration of plantation, one must not plant the trees closely. Proper care should be taken to remove weeds from the field. As soon as the first symptoms are visible, one must cut the affected parts and burn them. At the time of infancy, prune the trees to get fully aerated fields.
During fruit ripening, one must not irrigate the fields using sprinklers. Once the crop is cut from the field, destroy the remaining harvest by burning it. Above all try not to compost parts of these plants as they may carry over this disease to another season.

We will keep posting about any such informative information on to our blogs, to help as many people as possible. Farmonaut is built upon a vision to bridge the technological gap between farmers and strives to bring state-of-the-art technologies in the hands of each and every farmer. For any queries/suggestions, please contact us at support@farmonaut.com.

We have some more interesting articles coming up soon. Stay tuned!

Wait!!

Before that…

Follow us at:

Facebook: https://facebook.com/farmonaut

Instagram: https://instagram.com/farmonaut

Twitter: https://twitter.com/farmonaut

LinkedIn: https://www.linkedin.com/company/farmonaut/

Pinterest: https://in.pinterest.com/farmonaut/

Tumblr: https://farmonaut.tumblr.com/

Youtube: https://www.youtube.com/channel/UCYWOOPPKATLgh4L6YRlYFOQ

AppLink: https://play.google.com/store/apps/details?id=com.farmonaut.android

Website: https://farmonaut.com

Satellite Imagery: https://farmonaut.com/satellite-imagery

Satellite Imagery Samples: https://farmonaut.com/satellite-imagery-samples

Angular Leaf Spot

Angular Leaf Spots are very easy to  distinguish since the plants suffering from this develop leaf spots that follow leaf veins. It is caused by bacteria such as Pseudomonas syringae (cucurbits) and Xanthomonas fragariae (strawberries) that survive in seeds and plant debris.

Symptoms

Once water soaked-spots appear on leaves, they spread rapidly when conditions get moist and ambient temperature is around 24-28 degree celcius. These spots expands upto a point they fill the area between leaf veins completely, but do not cross each other. Occasionally, older spots dry out and tear apart, leaving a hole at its place.  On fruits, the spots appear as perfectly circular and water soaked and comparatively smaller than those on the leaves. The spots become powdery white and may crack the fruit open once the disease spreads. This contaminates fruits and causes fruit rot.

Biological Remedies

Use garlic solutions and hot water for around 30 minutes on infected seeding material. Use dehumidifiers in greenhouses to control night time humidity. It has also been found out that Pentaphage is lethal to Pseudomonas syringae, and organic copper fnngicides can slow the spread of the disease.

 

 

 

 

Chemical Control Measures

Pesticides containing copper hydroxide are most effective when the temperature is above 24 degree celcuis and the foliage is wet and are sprayed on a weekly basis. It is NOT recommended to spray the field on a hot day since it can seriously harm the plants.

Other Preventive Measures

Use furrow irrigation instead of sprinklers and avoid overwatering the field. Furthermore, do not sow crops in the field that have had cucurbits for at least 2 years. 

We will keep posting about any such informative information on to our blogs, to help as many people as possible. Farmonaut is built upon a vision to bridge the technological gap between farmers and strives to bring state-of-the-art technologies in the hands of each and every farmer. For any queries/suggestions, please contact us at support@farmonaut.com.

We have some more interesting articles coming up soon. Stay tuned!

Wait!!

Before that…

Follow us at:

Facebook: https://facebook.com/farmonaut

Instagram: https://instagram.com/farmonaut

Twitter: https://twitter.com/farmonaut

LinkedIn: https://www.linkedin.com/company/farmonaut/

Pinterest: https://in.pinterest.com/farmonaut/

Tumblr: https://farmonaut.tumblr.com/

Youtube: https://www.youtube.com/channel/UCYWOOPPKATLgh4L6YRlYFOQ

AppLink: https://play.google.com/store/apps/details?id=com.farmonaut.android

Website: https://farmonaut.com

Satellite Imagery: https://farmonaut.com/satellite-imagery

Satellite Imagery Samples: https://farmonaut.com/satellite-imagery-samples

Achaea Janata - Castor Semilooper

Castor Semilooper (achaea janata) is widely distributed throughout India. Though castor is the principal host plant for them, it has also been found to be predating on tea, sugarcane, pomegranate, banana, rose, grape fruits, citrus etc.

Occurence

From field observations it is identified that the castor semilooper moths are found after the showers in the month of may, and the eggs are found only in the month of June/July.

Extent of Damage

The first and early second instar semiloopers scrape the epidermis of the leaf, whereas the late second instar larvae make holes, and fourth and the fifth instar larvae defoliate the whole plant in case of heavy infestation. The proboscis of the adult is adapted for piercing and sucking the juice of fruits. The adult semiloopers create large patches of decay in ripe banana, create brown circular area surrounding the puncture, and make them prematurely fall and rot.

Biology

a. Egg

Freshly laid eggs range in size from 0.85 mm to 0.9 mm in diameter and are light green in color and dome shaped with ridges all around and the lower surface is concave.

b. 1st instar

The 1st instar semilooper is transparent in color with a half green anterior. It measures around 0.8 cm. The duration of this stage lasts from 2 to 3 days.

c. Molting

The freshly molted semilooper has tender and pale skin and after molting, the larva eats its casted skin.

d. 2nd instar

The 2nd instar semilooper measures 0.65 to 0.87 cm and is covered with white powdery substance with black head.

e. Adult Moth

Adult moths are light brown and even sometimes deep grey in color with white and brown patches on the wings. They measure around 2.45 cm in length and 5.6 cm in wing  span. Adult moths  have long proboscis through which they suck the fruit juice.

 

 

 

Natural enemies

The hymenopteran egg parasite of genus Telenomus is observed to keep castor semilooper in control. Similarly, branconid parasite Microplitis ephiusae is observed to be the natural control of the larvae. Field application of Bacillus thuringiensis spores have been found to be extremely lethal to the castor semilooper larvae.

Chemical Control Measures

1. Malathion can be sprayed thrice from flowering at three weeks interval. If a large number of semiloopers are observed, then spray 2ml/l of chloropyriphos in water.

Other Preventive Measures

It is recommended to build open space for birds which can feed on larvae. Once the harvest is ready, till the land to expose the semiloopers to predators.

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