How to prevent and cure longicorn beetles?

Longicorn beetles are herbivorous insects, which can endanger woody plants. According to their harmful characteristics, longicorn beetles can be divided into harmful trunk species, harmful shoot species, harmful peeled log species and harmful dry wood species. Most longicorn beetle species are secondary pests. Only a few insect species will directly endanger healthy living trees. Let's take a look at how to control longicorn beetles.

Make use of natural enemies

The main results are as follows: 1. Woodpeckers and longicorn beetles are two kinds of co-evolutionary creatures. There are 4-5 nest trees in 15-20 hectares of woodland, with a distance of about 100 meters between nests. They are cleaned and maintained once a year in autumn to artificially attract woodpeckers to settle down, such as attracting large-spotted woodpeckers to control bare-shouldered longicorn beetles and mulberry longicorn beetles.

2. For small longicorn beetles such as Monochamus alternatus, etc., the adults of swollen-legged wasps can be released in the forest during the larval stage of longicorn beetles, and the number of larvae of longicorn beetles in the forest can be controlled at 3:1.

3. The larvae of Anoplophora glabripennis are often parasitized on the larvae of Anoplophora glabripennis and Anoplophora glabripennis. The natural parasitism rate is up to 60%, with an average of 40%. It can protect and assist transfer and spread, and can also parasitize the larvae of Monochamus alternatus and Monochamus alternatus.

4. Beauveria bassiana and Beauveria bassiana control longicorn beetle larvae. During the growth period of longicorn beetles and white-striped longicorn beetles, when the temperature is above 20 ℃, wheat straw can be dipped in the mixture of bacterial powder and carbaryl to insert wormhole or 160 million spores / ml bacterial solution can be sprayed into the hole.

Physical prevention and cure

The main results are as follows: 1. Artificial shock can be used to kill longicorn beetles with false death, and some longicorn beetles can be killed artificially by making use of the characteristics of some longicorn beetles inhabiting in dry base.

2. The pine trees were injected with paraquat, ethephon or chlorophos to stimulate the increase of turpentine secretion and induce adults to lay eggs on the bait trees, and then peel the bait trees.

3. White the tree trunk below 2 mu above the ground to prevent adults such as Monochamus alternatus, Monochamus alternatus, Monochamus alternatus and Monochamus alternatus from laying eggs on the host.

4. Apply the cut and saw of mulberry trees with asphalt and varnish to prevent mulberry longicorn beetles from spawning.

5. Hammering the eggs and larvae, or scraping off the blister.

6. pest trees are flooded or exposed to the sun. It takes 1 to 2 months for flooding. Peel the pest wood and expose it in the hot sun and turn it over several times.

7. Vacuum nitrogen filling method is used to control longicorn beetles in bamboo and wood storage equipment.

Chemical control

1. Spray the branches with chemicals, including 40% dimethoate EC, 20% Yiguo EC, 20% phoxim EC, 50% phoxim EC, 40% omethoate EC, 50% fenitrothion EC, 25% chlordimeform hydrochloride salt agent, 90% trichlorfon crystal 100 times 200 times, a small amount of kerosene, salt or vinegar is better.

2. For mulberry longicorn beetles that feed downward and have defecation holes, zinc phosphide poison swabs, aluminum phosphide tablets and aluminum phosphide pills are used to block the bottom 2-3 defecation holes. Commonly used agents are 50% malathion EC, 50% fenitrothion EC, 50% dichlorvos EC, 25% imidophos EC, 40% omethoate EC and so on.

3. For the narrow-breasted longicorn beetles and curved tooth longicorn beetles that harm the roots, the mixture of 1000 times of 50% dichlorvos EC and 1000 times of 40% dimethoate EC can be infused into each affected plant.

4. The yellow-spotted longicorn beetles and green poplar tiger longicorn beetles that gnawed on branches or perched in cadres were sprayed with 40% omethoate EC, 25% carbaryl wettable powder and 2.5% deltamethrin EC 500 times.

5. During the peak period of adult longicorn beetles, 20% fenvalerate EC or 1500 times of dichlorvos EC was sprayed on the planted honey source bait trees to kill adults, and 741 intubation aerosol could be used to control adults in stands with canopy density above 0.6.

6. For the wood cut in summer and autumn, 10% cypermethrin EC or 50% phoxim EC can be sprayed into the upper part of the pile and the gap between the two ends, so as to prevent spruce longicorn beetles, etc., from spawning.

7. With thioyl fluoride or methyl bromide into the sealed tent, 1 cubic meter of wood needs 50 to 70 grams, sealed for 5 days, which is most suitable for mass treatment in the northeast cutting forest area. The wood harmed by longicorn beetles can be brushed with 50% dichlorvos EC 3 times.

Forestry prevention and control

1. Select the tree species suitable for local climate, soil and other conditions for afforestation.

2. Avoid the formation of large-area plantation by simple tree species. The mixed mode can be block or banded.

3. Resistant tree species and resistant strains, such as Populus tomentosa, Toona sinensis, Paulownia and Robinia pseudoacacia, were selected to prevent the spread of Anoplophora glabripennis and Anoplophora glabripennis.

4. Remove the sprouting branches and leaves from the trunk regularly to keep the trunk smooth. Improve the ventilation and light transmission of woodland and prevent adults from spawning. The hatching conditions of eggs were changed to improve the natural mortality of newly hatched larvae.

5. By adjusting the harvesting period, small diameter wood can be cultivated in the areas where the harm of main longicorn beetles is serious. Before the occurrence of rampant longicorn beetles, it not only processed and utilized wood in time, but also depressed the growth rate of insect population.

6. do a good job of two felling and three clearings, and timely cut down pest trees, dead standing trees, dying trees, pressed trees, weak trees, wind-broken trees and wind-fallen trees, so as to adjust the stand thinning density and enhance the tree potential.

7. For the green poplar longicorn beetle, black tarsal longicorn beetle and so on, the seedlings and branches with galls should be pruned in winter, cut off the galls and eliminate the larvae so as to reduce the overwintering insect population.

8. Toona sinensis and Melia azedarach were planted as repellent isolation zone in the forest area where mulberry longicorn beetles occurred, and sequoia and metasequoia were planted in the forest area where white-striped longicorn beetles occurred.

9. Improve the monitoring organization of dangerous longicorn beetles, implement the responsibility system and scientific monitoring means. Check regularly, issue forecasts, and guide prevention and control work.