There are a lot of holes in the apple tree that are bitten by insects.
This is caused by the damage of wood worms, and it is one of the main diseases that have jeopardized fruit tree branches in recent years. The worm has a generation in 2~3 years, which harms the xylem and the medulla. The affected part has a row of manure holes at a certain distance, and red and brown manure is discharged and accumulated on the ground.
Control method: The trichlorfon or dichlorvos can be inserted into the needle tube, and the hole can be sealed with mud to kill the woodworm. You can also use the cotton cockroach pesticide dichlorvos, stuffed into the insect eye, and sealed with mud or tape on the outside, you can kill the wood worm inside. In addition, the fruit growers can also spray the pesticide into the insect hole during the process of giving the orchard an insecticide such as imidacloprid to kill the woodworm.
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