Prevention method:
(1) Overwintering control: Use lime sulfur mixture to spray and scrape rough bark and warped bark. You can also use tree trunks and grass to trap overwintering mites and burn them in spring.
(2) Chemical control: When spider mites are found to be harmful to the leaves, they should be sprayed as soon as possible. Preventing the early damage is the key to controlling the later pests. Use 40% dicofol EC 1000 to 1500 times liquid, 50% dicofol WP 1500 to 2000 times liquid, 40% Dimethoate EC i500 times liquid, 20% Dimethoate EC 3000 times liquid spray control , When spraying, it should be even, meticulous and thoughtful. If it is serious, spray once every half a month, and spray 2 to 3 times continuously for good results.
The prevention method of Huai Chi'e:
(1) Dig pupae under the canopy and surrounding loose soil after falling leaves to before germination to eliminate overwintering pupae.
(2) Chemical control: In mid-May and late June, focus on the prevention and control of the first and second generation larvae. 50% pine borer EC, 80% dichlorvos EC 1000 to 1500 times liquid, 50% phoxim EC 2000 to 4000 times liquid, 20% Miesali EC 2000 to 4000 times liquid, 20% Miesali EC 4000 times liquid spray prevention.
(3) Bacillus thuringiensis emulsion can be used 600 times for biological control.
The prevention and treatment methods of rust-colored hornbeam:
(1) Artificial capture and killing of adult insects: The flying ability of adult longicorn beetle is not strong, and it is easy to fall to the ground due to vibration. It can kill egg-laying females on tree trunks at night every year from mid-June to late July.
(2) Artificial egg killing: During the spawning period of long beetle from July to August every year, find the egg mass on the tree trunk and break the egg mass with iron.
(3) Chemical control of adult insects: During the peak adult activity period from mid-June to mid-July each year, spraying 2000 times liquid to kill pyrethroid on the crown of the Chinese locust tree every 15 days, continuous spraying twice, can receive better results .
(4) Chemical control of larvae: March to October is the active period of longhorn beetle larvae. Inject 80% dichlorvos, 40% dimethoate or 50% phoxim 5 to 10 times into the borehole, and then use chemicals The mixed poisonous mud is sealed to kill the larvae.
(5) Make a whitening agent with 10 kg of lime + 1 kg of sulfur + 10 g of salt + 20 kg to 40 kg of water, and brush the trunk to prevent longhorn beetles from laying eggs.