| Stem fly: Ophiomyia phaseoli |
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Symptoms of damage
- Drooping of the tender leaves and yellowing
- Serious damage of young plants.
- The stem where maggot and pupae are present become swollen and start ribbing.
- Older plants show stunting but are not usually killed.
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Identification of the pest
- Eggs: The egg period lasts about 3 days.
- Larva: Larval period lasts for 5-6 days. The larva pupates in the larval groove for 8-9 days.
- Adult: The adult is a small black fly. A female lays 38-79 eggs singly on pods or on flower buds.
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| Larva |
Adult |
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Management
- Conserve natural enemies like Euderus lividus, Eurytoma sp., Euderus agromyzae
- Seed pelleting with chlorpyriphos @ 4 ml/kg of seed may reduce stem fly.
- Spray carbaryl 50 WP 1.5 kg 700 L water per ha.
- Soil application of carbofuran 3G @ 15 kg/ha at sowing
- Spray Imidacloprid 70 % WG 500 ml/ha a week after germination and second round 10 days after first round or NSKE 5%
- Timely sowing also minimizes the attack of the pest
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