Hoppers, shoot and fruit borer and petiole maggot and aphids are the main pests of okra.
Apply neem cake @ 250 kg/ha to soil immediately after germination and repeat it after 30 days.
In the initial stages of crop(before flowering )spray systemic insecticide like thioethoxam 0.3 gm/l or imidacloprid (0.3 ml/l) for managing hoppers. Once the fruit harvest starts, avoid insecticides
Spray neem or pongamia soaps @ 0.5 % or pulverized neem seed powder extract (NSPE) 4%. Give the lower surface of the leaves thorough spray, as the pest is generally found there.
Collect and destroy the affected fruits and stems.
Clipp and destroy aphid infested shoots and plant parts of the plant
Spray a systemic insecticide like dimethoate 30 EC ( 2 ml/l) acetamiprid (0.2 gm/l) for controlling aphids
Sprays dicofol 18.5 EC @ 2.5ml or any other acaricide like wettable sulphur 50 WP @ 3g/l to control mites. To increase the efficacy of syhttic acaricides mix them with spray neem soap/pongamia soap 1%.
Thorough spray on the under surface of the leaves is to be ensured for getting good control.