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PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
Pests > Pest Management > Chemical control > Plant derived products > Cooking oil for corn ear worm control, Mexico
October 2017. An entry of the Plantwise blog on the use of cooking oil to control corn ear worm in Mexico stimulated discussion. it is applied to the cobs at about 2-3 litres per 1000m2. And that takes about a day to apply.
1. How is the oil applied: by hand or by sprayer? Probably by hand. 2. It was tried previously on Rota, CMNI, and one much be careful. Vegetable oil will coat the husk and kill the cob if too much is applied. Also, a previous recommendation was to use MINERAL oil, just a drop on the silk of each cob. The writer tried vegetable oil and made some mistakes (presumably, meaning phytotoxicity occurred, so beware). 3. Treat a few cobs and see how it goes.