Blackgram

Insect Management

Introduction

  • The crop is attacked by beetles, jassids, white flies, pod borers, etc., and jassids use to transmit the yellow mosaic virus in the crop.
  • These all may be controlled by soil application of 25 kg/ha of Disulfotan at the time of sowing.
  • After about 50 or 60 days of sowing if any insect is visible then spraying of Rogor or Metasystox at a concentration of 0.2-0.3% should be done.
  • Proper control of white flies takes care of the yellow mosaic disease of the crop as it spreads by the white flies which use to transmit it.

Integrated Pest Management in Pulses

Integrated Pest Management of helicoverpa on blackgram

I. Cultural :

  • Summer ploughing
  • Avoid monocropping
  • Follow crop rotation
  • Avoid staggered sowing
  • Adopt wider row spacing (more than 2 metres)
  • Use recommended dose of fertilizers
  • Cultivate tolerant / recouping varieties.
  • Grow intercrops
    • Kharif : sorghum, soybean, gingelly, greengram, blackgram, greengram, dry paddy, bajrA
    • Rabi : coriander, cowpea, greengram, groundnut
  • Grow single variety on large scale.
  • Cultivate short duration varieties in Telangana

II. Mechanical

  • Monitor with Pheromone traps @10/ha
  • Dislodge the larvae by shaking the plants and destroy.

III. Biological

  • Release Trichogramma twice at weekly intervals @65000/ha.
  • Keep bird perches @50/ha.
  • Spray NPV or B.T (NPV @500 LE /ha or B.T @ 1kg/ha).

IV. Plant Products

  • Use Neem oil @5ml/l or Repelin @ 10ml/l or NSKE @ 50g/l

V. Synthetic Pesticides

  • Follow need based application
  • Avoid cocktail mixtures
  • Aim the sprayings at early instars
  • Apply endosulfan @ 2.0 l/ha or chlorpyriphos @ 2.5 l/ha or quinalphos @ 2.0 l/ha or acephate @ 1.0kg/ha alternatively during flowering & pod formation stage.
  • Ensure thorough coverage (900-1000 l/ha).
  • Use hydraulic / pneumatic hand compression sprayers (900-1000 l/ha).
  • Discourage synthetic pyrethroids
  • Avoid sublethal dosages
  • Adopt community approach

Integrated Pest Management of tobacco caterpillar on blackgram

I. Cultural :

  • Timely tillage to expose pupae
  • Removal of alternate / collateral hosts
  • Early sowing to escape severe broods
  • Raise trap crops like castor for oviposition, larval development.

II. Mechanical

  • Monitor with Pheromone traps @ 10/ha
  • Remove egg masses / skeletonized leaves
  • Dig trenches around the field
  • Pick and destroy the grown up larvae.

III. Biological :

  • Spray NPV @ 500 LE/ha
  • Spray BT @ 1kg/ha
  • Errect bird perches @50/ha.

IV. Plant Products

  • Spray Neem based compounds.
  • Synthetic Pesticides
  • Follow need based application.
  • Spray acephate (500 g/ha), chlorpyriphos (1250 ml/ha), quinolphos (1250 ml/ha), endosulfan (1000ml/ha) etc.
  • Use hydraulic /pneumatic hand compression sprayers (400-500 l/ha) or Mist blowers (135-165 l/ha).
  • Ensure thorough coverage (About 400-500 l/ha).
  • Avoid mixtures.
  • Avoid sub-lethal dosages
  • Discourage synthetic pyrethroids
  • Adopt community approach

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Telangana

Blackgram