Scout and spray insecticide if damage and pests are found. Japanese and green June beetles can be very numerous. Do not allow these pest to feed on fruit or become abundant. Mites may damage grapes. They feed on leaves, roughing and rasping the leaf surface and consuming sap.
Mites are capable of explosive population growth.
Treat if more than 10 mites per leaf are found or if leaves are webbed or bronzed from mite feeding . Drought and heavy crop load aggrevate mite injury, especially early in a growing season. Two treatments at 1 week intervals may be needed. Vendex causes eye, skin and respiratory irritation. When loading or applying wear goggles, long sleeves and long pants.