Cabbage diamondback moth DBM management spray rotation Bt trap crop Karnataka.
How to control diamondback moth in cabbage (patta gobhi) in Karnataka?
MManjunath1yr ago · 413 views
4 Answers
🌾Farmer.in Krishi TeamExpert ✓1yr ago
Diamondback moth is the major cabbage pest and it develops resistance fast, so rotation and IPM are essential. Use a trap crop of mustard sown a few rows for every several rows of cabbage and around the field, since the moth prefers mustard; spray or destroy the mustard when colonised. Monitor with pheromone traps, and spray on need basis rotating different groups including Bt formulations and recommended insecticides, never repeating the same molecule. Add a sticker or wetting agent because the waxy cabbage leaf sheds spray. Avoid synthetic pyrethroids used repeatedly as they worsen resistance and flare the pest. Keep fields clean of crucifer weeds. Confirm the current recommended molecules and trap crop ratio with your KVK or the Kolar horticulture office.
LLakshmi1yr ago
The mustard trap crop trick really works in my Kolar plot. The moths gather on the mustard and I treat that, so my cabbage stays cleaner and I spray the main crop less.
NNingappa1yr ago
Adding a sticker to the spray was the missing piece for me. Without it the spray just rolled off the waxy cabbage leaves and I blamed the chemical. With a wetting agent the same spray held on the leaf and worked far better.
SSavitha1yr ago
Time the mustard so a couple of rows are always flowering and attractive when the cabbage is young. I sow the mustard in stages, not all at once. If the trap crop dries up too early, the moths just move onto the cabbage.