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Crop: Bengal gram

Scientific name: Cicer arietinum L.

Common name: Bengal gram

Identification of the pest

Identification of the pest Eggs – are spherical in shape and creamy white in colour, laid singly Pupa – brown in colour, occurs in soil, leaf, pod and crop debris Adult - light pale brownish yellow stout moth. Forewing grey to pale brown with V shaped speck. Hind wings are pale smoky white with a broad blackish outer margin. Symptoms of damage Skeletinization of leaves – feeding chlorophyll only leaving veins by young larvae Defoliation Feeds flower and green pods In green pods – make circular holes and feed the grains and make empty.Management ETL: 2 early instar larvae/plant 5-8 eggs/plant Pheromone traps for Helicoverpa armigera 12/ha Bird perches 50/ha Hand picking of grown up larvae and blister beetles Ha NPV 1.5 x1012 POB/ha with teepol (1 ml/lit.) Apply any one of the following (Spray fluid 625 ml/ha) Dichlorvos 76 WSC 625 ml/ha Neem seed kernel extract 5% (31.0 kg/ha) twice followed by Triazophos 40 EC 780 ml/ha Neem oil 12.5 lit./ha Phosalone 35 EC 1.25 lit./ha (Note : Insecticide / Ha NPV spray should be made when the larvae were upto third instar)
Circular bore hole
  • Eggs – are spherical in shape and creamy white in colour, laid singly
  • Pupa – brown in colour, occurs in soil, leaf, pod and crop debris
  • Adult - light pale brownish yellow stout moth.
  • Forewing grey to pale brown with V shaped speck.
  • Hind wings are pale smoky white with a broad blackish outer margin.

Symptoms of damage

  • Skeletinization of leaves – feeding chlorophyll only leaving veins by young larvae Defoliation
  • Feeds flower and green pods
  • In green pods – make circular holes and feed the grains and make empty.

Management

  • ETL: 2 early instar larvae/plant 5-8 eggs/plant
  • Pheromone traps for Helicoverpa armigera 12/ha
  • Bird perches 50/ha
  • Hand picking of grown up larvae and blister beetles
  • Ha NPV 1.5 x1012 POB/ha with teepol (1 ml/lit.) Apply any one of the following (Spray fluid 625 ml/ha)
  • Dichlorvos 76 WSC 625 ml/ha
  • Neem seed kernel extract 5% (31.0 kg/ha) twice followed by
  • Triazophos 40 EC 780 ml/ha
  • Neem oil 12.5 lit./ha
  • Phosalone 35 EC 1.25 lit./ha

(Note : Insecticide / Ha NPV spray should be made when the larvae were upto third instar)

Symptoms of damage Skeletinization of leaves and the plant becomes whitish The larvae feed on leaf buds, flowers, tender pods and developing seeds. Ragged and irregular pod. (This is in contrast with the neat, and round hole, characteristic of pod borer damage.) Identification of the pest Moths have typically patterned forewings. The larva 25 mm long is green semiloopers. .Management ETL 10% affected parts Deep summer ploughing in 2-3 years to eliminate quiescent pupa. Early sowing, short duration varieties. Avoid closer plant spacing. Grow tall sorghum as comparison crop to serve as biological bird perches Collect and destroy larvae and adults to the extent possible Install pheromone traps at a distance of 50 m @ 5 traps/ha for each insect pest. Install Bird perches @ 50/ha. Setting of light traps (1 light trap/5 acre) to kill moth population. Control is achieved by releasing of Trichogramma chlionis at weekly intervals @1.5 lakh/ha/ week for four times. Conserve green lacewing, predatory stink bugs, spider, ants Application of NPV 250 LE /ha with teepol 0.1% and Jaggery 0.5% thrice at 10 – 15 days interval commencing from flowering stage. (Note: Insecticide / Ha NPV spray should be applied when the larvae are in early stage). Bt @ 600 g, neem oil/ pungum oil 80 EC @ 2ml/lit Spray NSKE 5% twice followed by triazophos 0.05%. Apply any one of insecticides at 25 kg/ha. Chlorpyriphos 1.5 % DP, quinalphos 4D, carbaryl 5D Spray insecticides like Carbaryl 10%DP.(OR) Quinalphos 25 EC @ 1000 ml/ha
  • Skeletinization of leaves and the plant becomes whitish
  • The larvae feed on leaf buds, flowers, tender pods and developing seeds.
  • Ragged and irregular pod. (This is in contrast with the neat, and round hole, characteristic of pod borer damage.)
  • Moths have typically patterned forewings.
  • The larva 25 mm long is green semiloopers.
  • ETL 10% affected parts
  • Deep summer ploughing in 2-3 years to eliminate quiescent pupa.
  • Early sowing, short duration varieties.
  • Avoid closer plant spacing.
  • Grow tall sorghum as comparison crop to serve as biological bird perches
  • Collect and destroy larvae and adults to the extent possible
  • Install pheromone traps at a distance of 50 m @ 5 traps/ha for each insect pest.
  • Install Bird perches @ 50/ha.
  • Setting of light traps (1 light trap/5 acre) to kill moth population.
  • Control is achieved by releasing of Trichogramma chlionis at weekly intervals @1.5 lakh/ha/ week for four times.
  • Conserve green lacewing, predatory stink bugs, spider, ants
  • Application of NPV 250 LE /ha with teepol 0.1% and Jaggery 0.5% thrice at 10 – 15 days interval commencing from flowering stage. (Note: Insecticide / Ha NPV spray should be applied when the larvae are in early stage).
  • Bt @ 600 g, neem oil/ pungum oil 80 EC @ 2ml/lit
  • Spray NSKE 5% twice followed by triazophos 0.05%.
  • Apply any one of insecticides at 25 kg/ha. Chlorpyriphos 1.5 % DP, quinalphos 4D, carbaryl 5D
  • Spray insecticides like Carbaryl 10%DP.(OR) Quinalphos 25 EC @ 1000 ml/ha
  • The caterpillar remains the soil at a depth of 2-4 inches.
  • The caterpillars cut the tender plants at the base, and branches or stems of growing plants.
  • The caterpillars drag the cut parts into soil for feeding.
  • The buried stem or branches is almost the sure index of the place where the caterpillar is hiding
  • Eggs - are laid on earth clods, chickpea stem bases and on both sides of leaves.
  • Larva - is dark brown with red head.
  • Pupa -Pupation takes place in earthen cocoon.
  • Adult- moth are brownish with numerous wavy lines and spots, measuring 3 to 5 cm across wings
  • Deep summer ploughing.
  • Use well decomposed organic manure.
  • Adapt crop rotation.
  • Early sowing in the last week of October.
  • Intercropping with wheat or Linseed or Mustard reduces infestation.
  • In the early stages pick the insects and destroy.
  • Do not grow Tomato or Lady Finger in near by field.
  • Grow marigold on bunds
  • The adult insects can be controlled by light traps
  • Spray insecticides like quinalphos 25 EC @ 1000 ml/ha
  • In case of severe infestation Spray insecticides like spark 36 EC at the rate of 1000 ml/ha. Profenophos 50 EC @ 1500 ml/ha.
  • Dilute the above in 500 - 600 liters water and spray.
Symptoms of damage Termite bores into the roots and stem. Due to the bore the plants soon dries. Attack may continue to the standing crop also especially during the period of drought.
  • Termite bores into the roots and stem. Due to the bore the plants soon dries.
  • Attack may continue to the standing crop also especially during the period of drought.
  • These are social insects, live in termitaria, in distinct castes, workers, kings and queen.
  • Eggs are laid on plants and in the soil.
  • 'Worker' are small (4 mm) and have a soft, white body and a brown head.
  • Frequent intercultural operations and irrigation before sowing.
  • Field sanitation, timely disposal of crop stables and undecomposed plant parts.
  • Undecomposed FYM or composed should not be used
  • Two-three deep ploughing could also help control this pest.
  • Destroy the termite bunds in and around the field and kill the queen and complimentary form.
  • Seed treatment with chlorpyriphos @ 4ml/kg of seed.