The symptoms seen in top picture are caused by a pest called thrips. The symptoms are: flowers fall off, light green elongated stripes and irregular forms on the fruit of the eggplant.
Thrips affect the flowers and the fruits of the eggplant which causes reduction in yield.The larvae and adult thrips feed and lay eggs on young leaves, flowers and on young fruits of many different plants and are the most serious pest in eggplant, sweet pepper, cucumber and bitter gourd. It is the feeding damage that causes the symptoms. Other host plants of this pest include vegetables, flowers and weeds. All thrips are very small and difficult to detect.
- Use wider planting distance
- Don’t over fertilize with nitrogen (N)
- Irrigate the plants in the dry season
- Use an insecticide such as (follow label recommendations):
- Diafenthiuron: apply at early flowering
Then alternate every 3 weeks with one of (check pre harvest interval):
When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval.