“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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Paddy Blast Symptoms

26/08/2019Posted on
  • Rice blast is one of the most destructive diseases of rice. 
  • A leaf blast infection can kill seedlings or plants up to the tillering stage. 
  • At later growth stages, a severe leaf blast infection reduces leaf area for grain fill, reducing grain yield.
  • Initial symptoms appear as white to gray-green lesions or spots, with dark green borders.
  • Older lesions on the leaves are elliptical or spindle-shaped and whitish to gray centers with red to brownish or necrotic border.

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How to Control Downy Mildew in Cauliflower

24/08/2019Posted on
  • Proper water management so that there is no excess moisture on the soil surface.
  • Saaf (Carbendazim 12% + Mancozeb 63% WP) @ 300-400 gm/acre or
  • Ridomil gold (Metalaxyl 4%+ Mancozeb 64% WP) @ 300-400 gm/acre.
  • Amistar (Azoxystrobin 23%Sc) @ 200 ml/acre.
  • Netivo (Tebuconazole50%+Trifloxystrobin 25%WG) can be sprayed @120 gm/acre.
  • Follow the crop cycle and keep the field clean.

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What’re the Symptoms of Downy Mildew in Cauliflower

24/08/2019Posted on
  • The stem shows dark brown, depressed lesions which later develop downy growth of the fungus.
  • On leaves, purplish-brown spots appear on the under surface followed by the appearance of downy growth on such lesions.
  • It causes damage to curd, producing curd-rot.

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Management of Fruit borer in chilli

23/08/2019Posted on
  • For control of adult pests, use pheromone trap @ 3-4/acre.
  • First spray Profenofos 50% E.C. @ 300 ml/acre + Chlorpyrifos 20% EC@ 500 ml/acre.
  • Second Spray Profenofos 50% EC @ 300 ml/acre  + Imamatin benzoate 5% SG @ 80-100 gm/acre or Profenofos  300 ml/acre + Flonicamid 50% WG @ 100 gm/acre.
  • Third spray imacactin benzoate 5% SG @ 80-100 gm/acre + fenpropathrin 10% EC @ 250-300 ml/acre. 
  • Fourth spray Chlorantraniliprole 9.3% + Lambda Cyhalothrin 4.6% ZC @ 100 ml/acre or thiodicarb 75% wp @ 250 grams/acre.
  • Spray the Beauveria bassiana @ 1 liter or kg/acre as a biological treatment

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Symptoms of damage “Chilli Fruit Borer”

23/08/2019Posted on
  • A circular hole is noticed at the base of the pedicel. The premature dropping of flowers and pods. The fruit turns to white color.
  • Mainly borer larvae have grown up into the fruits.
  • Early instar larvae by making a circular hole feed on young pod and flower buds. The larvae usually feed the seeds in mature fruit.
  • At the time of feeding the larvae head inside the pod and rest of the body outside from fruits.
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