How to control psyllid pests in China?

(1) Artificial control: scrape off the old bark in early spring, clean up the residual branches, fallen leaves and weeds in and around the garden, and eliminate the overwintering adults.

(2) Biological control: protecting and utilizing natural enemies. The natural enemies of psyllid in China are midges, lacewings, ladybugs and parasitic bees. Parasitic bees have the greatest control effect, and the natural parasitism rate of eggs is above 50%. Therefore, it is necessary to avoid using broad-spectrum pesticides at the peak of natural enemies.

(3) Chemical control: control time: the flower bud expansion period of Yali pear is the peak of overwintering adults. Drug types and concentrations: Biological preparations include 0.6% matrine aqueous solution 1000 times solution and 1.8% avermectin 4000 times solution; Chemical pesticide contains 20% amitraz 1200 ~ 1500 times, which does not kill natural enemies, but it has the strongest lethality to nymphs of psyllid, and has poor efficacy to eggs and adults. The efficacy is best above 25℃, or 40% dimethoate emulsion 1000 ~ 1200.