How does cloud spot longicorn prevent and cure?

Monochamus alternatus is a kind of harmful agricultural and forestry pest, which belongs to the genus Cerambycidae. It has a dark brown or grayish brown body, lives on tree trunks and branches during the day, has phototaxis, and feeds at night. Adults like to live on the host with a large tree crown after climbing out of the Eclosion hole. Let's take a look at how to control the Monochamus alternatus.

The living habits of Monochamus alternatus

Longicorn beetles live on tree trunks and branches during the day, have phototaxis, feed at night, gnaw on twig skins and leaves, and make a click. The larvae and adults overwintered in the cavities and pupae, and the overwintering adults went out by biting a round Eclosion hole in the middle of April of the following year. May was the peak period, and there were more Eclosion in continuous sunny days and high temperatures. The newly hatched larvae ate the phloem, blackened the injured place, burst the bark, discharged sawdust and insect dung, gradually ate the human xylem and upward after 20-30 days, and there were no sawdust and insect dung in the insect track. the larvae overwintered in the first year and continued to do harm in the next spring.

Damage characteristics of Monochamus alternatus

Monochamus alternatus is distributed in Shanghai, Jiangsu, Guangdong, Zhejiang, Hebei, Shaanxi, Anhui, Jiangxi, Hunan, Hubei, Fujian, Guangdong, Guangxi, Taiwan, Sichuan, Yunnan and other places in China. Adults feed on twig cortex and leaves, larvae eat tree trunks, and gradually penetrate the xylem from the cortex into oblique or longitudinal tunnels. the decay path is full of sawdust and feces, the light trees are weak, and the heavy ones are withered and dead. It will also lead to parasitism of bark moths and wood-rot fungi.

Control methods of Monochamus alternatus

1. Artificial hunting and killing: the adults should be checked frequently during the peak period, making use of the characteristics that adults have phototaxis, do not like to fly, move slowly, and make sounds after being frightened, trapping and killing with lights in the evening or manual capture in the morning.

2. Egg stage prevention and treatment: looking for eggs during the egg stage, dig the eggs with a knife or smash the eggs with a hammer, and during the peak incubation period, apply 50% phoxim EC 5 times 10 times to kill the newly hatched larvae.

3. Larval control: when it is found that there are dung shavings on the tree trunk, the larvae are dug out to destroy, or 50% dichlorvos EC is injected and sealed, or the wormhole can be blocked and sealed with medicine mud or soaked cotton balls.

4. Trunk coating: in winter or before spawning, mix well with 5kg of lime, 0.5kg of sulfur, 0.25kg of salt and 20kg of water, then brush the base of the trunk to prevent adults from spawning and kill larvae.