Plant wilt-resistant varieties and use trap crops, if appropriate. Although There are several insecticides that control the beetle, only a few chemicals can be used on cucurbit plants because of their sensitivity to chemical injury. Application of an insecticide is usually recommended as soon as the plants begin to emerge through the soil. For prevention of bacterial wilt, it is often advisable to spray at 5-day intervals, beginning when seedlings emerge or after transplanting and continuing spray schedule until vines run. Sprays prepared from wettable powders are less phytotoxic than sprays prepared from emulsifiable concentrates.
Dusts are likewise effective if plants are Thoroughly covered.
Malathion may cause injury to plants if applied before they start to vine. Malathion may cause some foliar burning and should not be applied when plants are wet. Do not combine Malathion and Sevin for application to cucumbers due to possible phytotoxicity. Predators and Parasites Natural predators include soldier beetles, tachinid flies, braconid wasps and certain nematodes. This publication contains pesticide recommendations that are subject to change at any time.