How to control the San Jose scale? Control methods and technical key points

(1) Quarantine control. Inspect nursery stock, scions and fruit to prevent spread.

(2) Manual and agricultural cultivation control. In combination with scraping bark in winter and spring, brush off and destroy the overwintering generation on branches; also carry out comprehensive control in nearby apple, pear and other orchards to prevent spread by wind and large insects, and pay attention to pruning out infested branches.

(3) Protect and make good use of natural enemy resources. Where conditions permit, jujube orchards can rear and release natural enemies artificially. The main natural enemies include: Chilocorus rubidus, Chilocorus kuwanae, encyrtid wasps and birds.

(4) Chemical control. Shortly before bud break, spray trunks and branches with 5 degrees Baume lime sulfur mixture, or 8-10 times rosin mixture. During the male adult emergence period and when young nymphs first appear, that is, early and mid-May, early and mid-June, mid-July, and early and mid-August, spray for control; for the pesticides that can be used, see the control section for the jujube mealybug. To improve control efficacy, add 400-600 times laundry detergent (neutral) solution when applying the pesticide.