Why is the dormant/delayed dormant stage important in an IPM program?
Dormancy is generally defined as the period from leaf fall until growth resumes in spring. Delayed dormancy is the period from the resumption of growth, indicated by bud swell, until green tip.
Dormant stage begins around December 1 and ends when bud growth begins, about February 1 or so. This crop stage varies according to region, variety, and weather.
The dormant stage is a critical period for certain pest management activities including:
Dormant versus delayed-dormant treatments
Choice of insecticides
During the dormant stage, applications of organophosphate or pyrethroid insecticides against peach twig borer are discouraged in an IPM program. Delay peach twig borer Bt applications until bloom time.