They have three to four generations per year. Although omnivorous leafroller feeds on both fruit and foliage, leaf-feeding damage is minor. When larvae feed on fruit, they cause irregular, shallow scars similar to those caused by orange tortrix. Larvae feed where fruit are touching, so entire clusters frequently are damaged. One spray should keep omnivorous leafroller under control for the remainder of the season.
Treatments are most effective when made around cluster bud.
Apply materials before bees are placed or after they are removed. The following materials are listed in order of usefulness in an IPM program, taking into account efficacy and impact on natural enemies. Least harmful to beneficials. Bt is a stomach poison and must be consumed by the leafroller. Must be applied when worms are small.