How to deal with poplar insects?

Artificial hunting: according to the scars or grooves bitten by adults when laying eggs, the eggs are stabbed or crushed with a knife or hammer, and the larvae are hooked out with iron wires to catch adults.

Chemical control, using green Wei Lei to control the adults of longicorn beetles, and spraying 200-300 times of green Wei Lei solution on the trunk or big lateral branches before the adults of longicorn beetles emerge.

For trees with high crown and difficult spray control, 40% omethoate stock solution and 20% imidacloprid can be used to punch holes in the trunk to control the adults and larvae of Cerambycidae. The method is to drill an oblique hole from the ground to the xylem 30cm, and the dosage is generally 0.3-0.9mL/cm DBH. It can also be injected directly from the fecal hole.

Extended data:

Poplar is the most widely distributed and adaptable tree species in the world. Mainly distributed in temperate and cold temperate forest trees in the northern hemisphere, latitude 22-70, altitude as low as 4800 meters. In China, the distribution range spans 25 ~ 53 N and 76 ~ 134 E, covering northeast, northwest, north and southwest.

Poplar natural forest covers an area of more than 20 million hectares (poplar is the dominant tree species in the world), and there are about 100 natural tree species. The countries with the widest distribution of natural poplar varieties are Russian, China, Canadian, American, Italian, French and other countries.

Populus tomentosa is widely distributed in Liaoning (South), Hebei, Shandong, Shanxi, Shaanxi, Gansu, Henan, Anhui, Jiangsu, Zhejiang and other provinces, with the middle and lower reaches of the Yellow River as the center.