How to control Monochamus alternatus?

Monochamus alternatus, an insect of the genus Monochamus alternatus of Cerambycidae, is an important stem decay pest of pine trees in China, and it is also the main vector insect of pine wood nematode disease. It plays a key role in carrying, spreading and assisting pathogens to invade the host in the process of spread and infection of pine wood nematodes. Let's take a look at how to control Monochamus alternatus.

From October to April last year (pupa and adult)

1. Concentrate the damaged logs and pine rods, cover them with plastic film, and place fumigant around them evenly, then quickly press the edge of the film with soil and seal it for 2 or 3 days.

2. After steam heating, Kang room heat drying or constant temperature 50 ℃ heat treatment for 24 hours, pest wood must be fumigated with aluminum phosphide 4 g / m3, methyl bromide 16 g / m3 or sulfuryl fluoride before adults fly.

3. Adjust the cutting period to the end of autumn and the sales period to winter and spring, so as to sell all the pine stalks before the damage caused by longicorn beetles, so as to avoid the occurrence of man-made insect sources.

The population density of Monochamus alternatus in the forest can be reduced by clearing pest trees, weak trees, pressed trees and underforest shrubs and weeds in April and December.

5. The use of natural geographical conditions to open up a 4-kilometer wide isolation zone can effectively prevent the spread of Monochamus alternatus.

6. After the pest wood is felled and stored outside the forest for 12 months, the newly cut pest wood is cut into boards less than 2 cm in thickness, which can kill most of the Monochamus alternatus.

From May to August (adult stage of Yang Fei)

The main contents are as follows: 1. Set bait wood to trap and kill, the bait wood is more than 100 meters apart, one live pine tree is cut down at each point, it is divided into three sections, and the branches are stacked under the tripod, and a new cutting section is added on the tripod at a certain interval.

2. Setting traps in the forest can monitor its occurrence and population changes, and the effect of impact plate funnel type or impact plate basin type trap is the best, and the attractant is arranged according to 33 grid. The effect of trapping and killing Monochamus alternatus with 450 watt high pressure mercury lamp is better.

3. Spray 50% fenitrothion or 25% diflubenzuron Ⅲ gel suspension 1000ml / ha, in mid-April and mid-May with 50% fenitrothion ·buprofezin 100x, twice in mid-May and mid-June with 400m / 500x Baosongling, and in mid-late June, ultra-low volume spray 8% green Weilei 900ml / ha Spray control with 2000 times of 12% parathion EC + 4% polyvinyl alcohol + 2.5% deltamethrin EC during the replenishment period of Monochamus alternatus.

May to September (egg, larva and pupa stage)

In January and July, the point plant method was used to release Guan's swollen leg wasp with a density of 5000 heads per hectare.

2. Sprinkle Beauveria bassiana powder in gauze bag or inject bacterial solution into the hole in autumn.

3. Indoor breeding velvet fortified armour is released in the forest.

4. Pay attention to protecting natural enemies such as Guan's swollen leg wasp, Beauveria bassiana and attracting woodpeckers.

5. strictly strengthen quarantine, prohibit the export of wormwood and wood packaging without any treatment, and destroy them on the spot once found.