Brinjal shoot and fruit borer Leucinodes IPM pheromone trap Maharashtra control.
4 Answers
Brinjal shoot and fruit borer (Leucinodes orbonalis) is the main pest and IPM cuts both damage and spray cost. The first and most important step is regular clipping and destruction of bored, wilted shoots and damaged fruits at least weekly to remove larvae. Install pheromone traps for monitoring and mass trapping; about 4 to 5 traps per acre for monitoring and more for mass trapping, replacing lures roughly every 3 to 4 weeks. Release of Trichogramma where available and need based sprays of recommended insecticides, rotated by group, complete the package. Avoid calendar spraying which wastes money and builds resistance. Field studies in India show eco friendly IPM clearly lowers shoot and fruit damage versus farmers practice. Confirm currently approved insecticides with your KVK.
Near Pune I started clipping the drooping shoots twice a week and hung pheromone traps. My spray bills came down and the marketable fruit improved a lot. The hand work is tedious but it is worth it.
Collect the bored shoots and fruits in a bag and take them out of the field, do not just drop them on the bund. The first season I left the clipped pieces lying in the field and the larvae simply moved back. Burying or destroying them properly is part of the job.
One more thing that helped me was not flooding the crop with nitrogen. Soft, lush growth seems to attract more borer attack. After I switched to a balanced dose based on my soil test, the shoots were harder and the damage was lower.