Why Is the Dormant/Delayed-Dormant Season Important in an IPM Program?
The dormant season is a critical period for various pest management activities:
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 versus delayed-dormant treatments. If the main target is San Jose scale, then a dormant timing (before bud swell) for treatment is usually best. Control of European fruit lecanium nymphs, peach silver mite, peach twig borer larvae in hibernacula, and fruittree leafroller egg masses is effective at either timing. European red mites (eggs), brown mites (eggs), and obliquebanded leafroller larvae are best controlled using delayed-dormant timing.