I have cultivated coconut in 2 acres about 6 years back near Ankola on the karnataka coast. The trees have started to bear nuts now.
I have a problem with the red palm weevil. This weevil has completely destroyed about 30-35 trees till date. Not only coconut but also Cashew. The female bores a hole in the tree trunk near or slightly above the root region and lays eggs inside the tree. When the eggs hatch the young feed on the core of the tree and destroy the plant. I have tried spraying Monocrotophos at regular intervals but it is not helping. I have also put lures to attract the males but that does not stop the females. But every year four to five trees succumb.
Is there any organic/natural way to stop these critters? Its gut wrenching to see the palms die. Thanks for your help.