What are the diseases and insect pests that harm hawthorn trees?

Hawthorn pest control: 1. Prevention and control methods of heart-eating insects: Spray 800 to 1000 times 50 of fenitrothion EC to kill newly hatched larvae during the hatching period.

2. Prevention and control methods of red spider mites: ① During the nymph hatching period before or after flowering, spray dicofol 800 to 1000 times 40 times, or a lime sulfur mixture of 0.3 to 0.5 Baume degrees, or 1000 times 50% of trithion poison kills nymphs. ②In summer, in addition to using dicofol, you can also spray a mixture of dichlorvos and dicofol (1 part of 80% dichlorvos EC, 1.3 parts of 20% dicofol plus 1000 parts of water), or trithionate and dicofol. A mixture of dicofen and sulfone (preparation method is the same as above), or a mixture of dimethoate and dicofol (1 part of 40% dimethoate, 1 part of 20% of dicofol and 800 parts of water) to kill insects and eggs. ③ Before fruit trees germinate in spring, spray No. 20 petroleum emulsion 30 to 40 times to kill overwintering insect eggs.

3. Prevention and control methods of scale insects: ① Spray 20 times of No. 20 petroleum emulsion or 5 degrees Baume lime sulfur mixture on trees before they germinate, which can kill adults and nymphs. ② During the hatching and active period of nymphs, spray 0.3 Baume degree lime sulfur mixture, or 800 to 1000 times 80 dichlorvos EC to kill nymphs. ③ During the pupation stage of male insects, wash away the pupae with clean water. ④Spray 1000 times 80 dichlorvos emulsifiable concentrate to kill male nymphs. ⑤Brush off overwintering female insects on branches in winter and spring.