Control of Mites in Chilli

31/08/2019Posted on

Control of Mites in Chilli:-

  • The tiny spider like insects are found large in numbers and the underside of leaves are covered with fine webs.
  • Nymphs and adults suck sap from leaves.Affected leaves curl downward along the margins of the leaf and attain an inverted boat shape.
  • Leaf petioles elongated and small leaves serrated and looks like bunchy.
  • Leaves turn into dark grey in colour, reduce leaf sheath and stops flowering.
  • In severe cases, fruit wall becomes hard and white strips appears on the fruit.

Control:-

  • Acaricides like Sulphur 80% WP@ 3 Gm per litre of water gives effective control of mites.
  • Twice spraying of Propargite 57% EC @ 400 ml/Acre in 7 days interval helps in controlling the pest in initial stage .
  • Collection and burning of severely infested plant parts reduces further multiplication of mites.
  • Proper irrigation and clean cultivation are essential to control the pest population.

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Aphids Attack in Chilli Crop

31/08/2019Posted on

Aphids Attack in Chilli Crop:-

  • Nymphs and adults are both soft bodied pear shaped, blackish in colour.
  • Appear on the tender shoots, leaves and on the lower surface of the leaves.
  • Suck the sap and reduce the vigor of the plant.
  • Secrete sweet substances which attract ants and develop sooty mold.

Control:-Spray the crop with Following insecticides at 15-20 days interval till the end of aphid population checked.

  1. Profenofos 50% EC @ 50 ml/ Pump.
  2. Acetamiprid 20 SP @ 10 gm/Pump.
  3. Imidacloprid 17.8% SL @ 7 ml/pump.
  4. Fipronil 5% SC @ 40 ml/Pump.

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How to control Anthracnose or Pod Blight in Soybean crop

30/08/2019Posted on
  • Healthy seed should be selected for sowing.
  • The seed should be treated with Thiram+Carboxin @ 2 g/kg of seed before sowing.
  • Continuous sowing in the same plot should be avoided.
  • Spray the crop with Carbendazim 12% +Mancozeb 63% WP@ 400 Gm/Acre at 10-15 days intervals, first spray be given on the appearance of symptoms.
  • In Several Attack, spray the crop with Tebuconazole 25.9% EC @ 200 ml/Acre.

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Symptoms of Anthracnose or Pod Blight in Soybean crop

30/08/2019Posted on
  • Soybeans are susceptible to infection at all stages of development. Plants and seeds may be infected.
  • If the infected seed is planted, early disease development may result in damping-off (seed or seedling rot causing plant death). Dark brown lesions develop on cotyledons, the stem may collapse, and seedlings may die under severe infection.
  • Most commonly, however, plants become infected during bloom and pod fill (reproductive stages) due to spores spread from infected plant residue.
    • Symptoms appear on stems, pods, and leaf petioles as irregularly-shaped brown blotches.
    • Severe symptoms may include leaf rolling, premature defoliation, and stunted plants. Pods may be shriveled and contain less seed, moldy seed, or no seed
  • In some cases, pods can be diseased, and the seed may be infected but without symptoms in the seed.

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How to control “Pink boll-worm”

29/08/2019Posted on
  • summer deep ploughing
  • Destroy previous crop or plant debris    
  • Spray Beauveria bassiana @ 1 ltr/acre during flower initiation period to spray should be done regularly  3 no moon day (Amavasya ). 
  • Quinalphos 25 % EC @ 300ml/acre during pre-flowering stage of plant.
  • Profenofos 40%EC + Cypermethrin 4 %EC @ 500 ml/acre.
  • Fenpropthrin 10% EC @ 400ml/acre

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“Pink bollworm” Nature of damage

29/08/2019Posted on
  • The holes of entry plugged by excreta of larvae which are feeding inside the seed kernels.
  • The attacked buds and immature bolls drop off.
  • Discolored lint and burrowed seeds.

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Management of Thrips in Cotton

28/08/2019Posted on

Management of Thrips in Cotton:-

Nature of Damage of Thrips:-

  • Nymphs and adults lacerate the tissue and suck the sap from the upper and lower surfaces of leaves.They inject saliva and suck the lysed contents of plant cells resulting in silvery or brown necrotic spots.
  • Seedlings infested with thrips grow slow and the leaves become wrinkled curl upwards and distorted with white shiny patches.
  • Rusty appearances in patches develop on under surface of leaves.
  • Higher infestation during vegetative crop growth results in late bud formation.
  • During the fruiting phase there is premature dropping of squares and the crop maturity is delayed combined with yield reduction.
  • The feeding by thrips on the developing bolls late in the season cause spots or wounds on the ripening of the ball or the quality of the seed.

Management:-

  • Seed treatment – Imidacloprid 60 FS @ 10 ml/kg or thiamethoxam 70 WS @ 5 g/kg seeds applied as seed treatment are efficient in suppressing the population of other sucking pest on cotton seedling.
  • Maintaining weed free conditions in cotton field from the spread of development of thrips.
  • Insecticidal options should be made when thrips infection results in high grade injury during clear sky period with no anticipated rains.
  • Spray of NSKE prepared on farm or crude neem oil spray @ 75 ml per pump suppress thrips population during pre squaring crop stage in both cases detergent / soap powder @ 1 gm / litre of spray fluid is to be added for getting uniform spray suspension.
  • Chemical Spray:- Spray any one Following insecticide.
  1. Profenofos 50% EC @ 50 ml/ Pump.
  2. Acetamiprid 20 SP @ 15 gm/Pump.
  3. Imidacloprid 17.8% SL @ 7 ml/pump.
  4. Thiamethoxam 25% WG @ 5 gm/pump.
  5. Fipronil 5% SC @ 40 ml/Pump.

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Control of White fly in Tomato

28/08/2019Posted on

Control of White fly in Tomato:-

  • Sucks the sap of plant.
  • Transmits curly diseases.
  • Affected leaves get shriveled and gradually curl up.

Control :-

  • Spray Dimethoate 30% EC @ 300 ml/acre in the early stage of crop.
  • Use 100 mesh nylon net to avoid entry of white fly into the nursery.

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How to Control false wireworm in soybean

27/08/2019Posted on

To control this pest spray one of these pesticides.

  • Lambda Cyhalothrin 5% EC @ 300 ml/acre.
  • Chlorantraniliprole 9.3% + Lambda Cyhalothrin 4.6% ZC  @ 100-150ml/acre
  • Spinosad 45% SC @ 80-100 ml/acre.

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False wireworm (Gonocephalum) damage symptoms in soybean

27/08/2019Posted on
  • Larvae of Gonocephalum are attracted to germinating seeds. The larvae damage the seeds and the developing roots and shoots. Larvae scrape away at least part of the seed coat and feed on the kernel and cotyledons.
  • Adult Gonocephalum destroy emerging seedlings by feeding on the cotyledon leaves, or on the growing tip, or by ‘ring barking’ the stem at ground level. 
  • Adult Gonocephalum are active on the soil surface, and tend to damage dicotyledonous crops more severely than monocots. 
  • This insect eats newly developed seeds in soybean pods and cuts the pods.

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