Spotted boll worm (Earis vitella ,E.insulana, Noctuidae,lepidioptera)
Damaging stage : larvae
Symptoms of damaging : damaging tender hoot by boring later instar bores flowers, square and bolls.
Identification Earis vitella
- Egg : white
- Larvae: light brown with white patches and ventral aspect green in color and body covered with bristle/setae.
- Pupa : pupation on leaf, fruit and
- Adult : pale white forewings, broad green band in middle.
Earis insulana
- Egg : white
- Larvae : dull greenish white in color with no of black marking and orange color dot on prothoracic region.
- Pupa : pupation on sand ,leaf ,fruit.
- Adult : forewings are complete green in color .hind wings are white in color.
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E. vitella |
E. insulana. |
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Larva |
Brown, with longitudinal white stripes on dorsal side as against for |
Cream coloured body with orange dots on prothorax |
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Adult |
Medium sized, head and thorax ochreous white |
Adults are smaller than E. vitella Head and thorax pea green in colour |
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Forewings are pale white with a broad wedge shaped horizontal green patch in the middle. |
Forewings uniformly pale yell |
Life cycle
Egg– 3 days—> larva –10-12 days—-> Pupa –7-10 days—> Adult
Management
- Crop rotation and clean
- Deep summer
- Intercrop sorghum, green gram , cluster
- Pheromone
- Trichogramma
- Bt cotton
- Release of 1st instar larvae of green lace wing predator Chrysoperla carnea @ 10,000/ha.
- Dust carbaryl 10 % DP @ 25 kg /ha or spray Bacillus thuringiensis @ 2 g/lit.or spray any one of the following insecticide.