How to control fruit fly without chemicals using traps?

Fruit fly is one pest where traps genuinely work very well without chemicals, because the male flies are strongly drawn to a lure. The standard method is a methyl eugenol trap, used for many fruit flies on mango, guava and several fruits, and a cue lure trap for the melon fruit fly of cucurbits like bitter gourd, cucumber and pumpkin. You can buy ready trap kits or make a simple one from a plastic bottle, cut windows, put a cotton wick soaked in the lure plus a little insecticide drop or soapy water below to drown the flies. Hang around 4 to 8 traps per acre, more in a heavy season, and recharge the lure as advised on the pack. Combine traps with field sanitation, that is, daily collecting and deep burying or destroying fallen and stung fruits, because that breaks the breeding cycle. Traps catch only males, so sanitation is what really cuts the next generation. Confirm lure type and trap density for your crop with the local KVK.