Management of Mealy Bug in Cotton

04/10/2019Posted on
  • Remove the alternate weeds hosts.
  • Monitor the incidence regularly and look for crawler emergence.
  • Take up the management at the initial stage to get maximum control.
  • Wherever necessary use neem based botanical insecticides such as neem oil @ 75 ml per pump or NSKE @ 75 ml per pump.
  • Use of Dimethoate @ 30 ml/pump or Profenophos @ 40 ml/pump or Buprofezin @ 50 ml/pump may be adopted as an alternative.

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Mealy Bug in Cotton

04/10/2019Posted on
  • Heavy clustering of mealy bugs usually seen under the surface of leaves as a thick mat with a waxy secretion.
  • Excrete copious amount of honeydew on which the fungus sooty mold grows.
  • Affected plants appear sick and black, resulting in reduced fruiting capacity.

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Control of Verticillium wilt in cotton

13/09/2019Posted on
  • Level up after deep plowing (6-7 inches).
  • Use disease-free seed.
  • Follow 6-year crop rotations.
  • Grow resistant varieties.
  • Trichoderma viride @ 2 kg/acre mix it with 40-50 kg of FYM and apply at the time of sowing  
  • Seed treatment with Carboxin 37.%+ Thiram 37.5% @ 2 gm /kg or Trichoderma viride @ 5 gm/kg.
  • Trichoderma viride @ 1 kg + Pseudomonas fluorescens @ 1 kg make the solution in 200 liters of water and apply as root drenching.
  • Apply Mycorrhiza @ 4 kg/acre at 15 days after sowing.
  • Spraying Thiaphanate methyl 75% WP @ 300 gm/acre at before flowering.
  • Spraying Propiconazole 25% EC @ 125 ml/acre at pod formation stage.

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Verticillium wilt of cotton

12/09/2019Posted on

 

  • Plants infected at early stages are severely stunted.
  • The first symptoms can be seen as bronzing of veins.
  • It is followed by interveinal chlorosis and yellowing of leaves.
  • Finally, the leaves begin to dry, giving a scorched appearance.
  • At this stage, the characteristic diagnostic feature is the drying of the leaf margins and areas between veins, which gives a “Tigerstripe” or “Tiger claw” appearance.

 

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Control of Fusarium wilt in cotton crop

11/09/2019Posted on
  • Level up after deep plowing (6-7 inches).
  • Use disease-free seed.
  • Follow 6-year crop rotations.
  • Grow resistant varieties.
  • Seed treatment with Carboxin 37.%+ Thiram 37.5% @ 2 gm /kg or Trichoderma viride @ 5 gm/kg.
  • Apply Mycorrhiza @ 4 kg/acre at 15 days after sowing.
  • Spraying Thiaphanate methyl 75% WP @ 300 gm/acre at before flowering.
  • Spraying Propiconazole 25% EC @ 125 ml/acre at pod formation stage.

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Symptoms of Fusarium wilt in cotton

11/09/2019Posted on
  • Causal organism: Fusarium oxysporum f.sp. Vasinfevtum
  • Wilt is one of major diseases of cotton. 
  • Discolorations of leaves start from the margins and spread towards midribs.
  • The veins become darker, narrower and spots.
  • Browning and blackening of vascular tissues.

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Control of Fusarium wilt in cotton crop

02/09/2019Posted on
  • Level up after deep plowing (6-7 inches).
  • Use disease-free seed.
  • Follow 6-year crop rotations.
  • Grow resistant varieties.
  • Seed treatment with Carboxin 37.%+ Thiram 37.5% @ 2 gm /kg or Trichoderma viride @ 5 gm/kg.
  • Apply Mycorrhiza @ 4 kg/acre at 15 days after sowing.
  • Spraying Thiaphanate methyl 75% WP @ 300 gm/acre at before flowering.
  • Spraying Propiconazole 25% EC @ 125 ml/acre at pod formation stage.

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Symptoms of Fusarium wilt

02/09/2019Posted on
  • Causal organism: Fusarium oxysporum f.sp. Vasinfevtum
  • Wilt is one of major disease of cotton. 
  • Discolorations of leaves start from the margins and spread towards midribs.
  • The veins become darker, narrower and spots.
  • Browning and blackening of vascular tissues.

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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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