Red-necked long-horned beetles are called iron cannon insects and harrier worms. They mainly damage fruit trees such as cherries, peaches, plums and apricots.
Red-necked longhorn beetle: damage caused by larvae eating in the branches and trunks of the tree, the feces block the insect passages, some excrete a large amount of feces from the defecation holes and accumulate at the base of the trunk, and some feces are squeezed out from the cracks in the bark , There is often glue flow. The decayed branches can easily cause gum flow and weaken the vigor of the tree. When the damage is serious, it can cause dead branches or dead trees or even the destruction of the whole garden.
Prevention method
â‘ Manually dig out larvae or capture adults. Check the trunk frequently, and dig out the larvae with a knife when fresh insect dung is found, and catch the adults during the emergence period.
â‘¡ Smoke and kill larvae. It can be carried out from May to September, find the worm holes deep into the xylem, hook out the worm feces with iron wire, stuff 1 gram of aluminum phosphide tablets, or stuff a cotton ball dipped in insecticide, and then block the worm holes with mud , Can kill old larvae deep into the xylem. When the insect population density is high, the trunk can be wrapped tightly with plastic film, the upper and lower ends are tied tightly with ropes, the rough bark is shaved off at the tie, and 50 g/m2 aluminum phosphide sheet is placed on the surface of the trunk before tie the mouth. Aluminum phosphide emits phosphine poisonous gas in contact with water, which can kill larvae in the skin. Generally, the larvae in the cortex and between the skin and wood can be killed.
â‘¢Scrape the skin and remove the eggs. Scrape the main branch to remove the eggs. The trunk can also be painted white to prevent adults from laying eggs.
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