Okra Shoot borer: Earias vitella, E. insulana
Symptoms of damage:
- Terminal shoots wither and droop
- Shedding of buds and flowers
- Bore hole in fruits and fee
- Deformed fruits
Identification of pest:
E. Vitella:
- Egg: Sculptured egg and sky blue in colour
- Larva: Brownish with white streaks dorsally and pale yellow ventrally
- Adult: Forewing is pale with a wedge shaped green band in the middle
E. insulana:
- Larva: Brown with dorsum showing a white median longitudinal streak
- Pupa: Brown and boat shaped
- Adult: Forewing is uniformly silvery green
Management:
- Set up pheromone trap @ 12/ha.
- Collection and destruction of affected fruits.
- Release of egg parasite Trichogramma chilonis @ 1.0 lakh/ha.
- The release of 1st instar larvae of green lacewing 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
|
Insecticide
|
ml or g/lit |
| Azadirachtin 0.03% WSP (300 ppm) | 5.0 g/lit |
| Azadirachtin 5% Neem Extract Concentrate | 5.0 ml/10 lit |
| Emamectin benzoate 5 % SG | 3.0 g/10 lit |
| Phosalone 35 % EC | 1.5 ml /lit |
| Pyridalyl 10 % EC | 1.0 ml/lit |
| Quinalphos 25 % EC | 8.0 ml/10 lit |
Source-
- TamilNadu Agritech Portal.
