Low-trap catches at the end of January to early February represent the beginning of adult emergence, which will give rise to the first generation. The following materials are listed in order of usefulness in an IPM program, taking into account efficacy and impact on natural enemies. Ground application only. Processors must be informed if this material is used. Works best when 2 applications are applied 10 days apart in dry, warm weather during spring when shoots are less than 18 inches long and orange tortrix is found rolling leaves at tip of shoot.
Good coverage is critical.
Not as effective later in season when larvae are in the fruit bunches. Do not feed treated grapes to livestock. Disruptive to predators of mites and parasites of leafhopper. Extremely toxic to honey bees. Permit required from county agricultural commissioner for purchase or use.