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Prevention and treatment of common pests in cherry trees
First, red neck longicorn 1. Harmful symptoms. The larvae feed on the branches of the tree and first stratify the food under the cortex. Then they enter the xylem and go deep into the center of the trunk. The woodworm-like excrement piled up outside the wormhole can easily cause fluid flow. In severe cases, the whole plant dies. 2. Control methods. From mid-June to mid-July, artificial killing is performed at noon; before the hatching of the upper and middle months of June, spraying of whitening agent on the branches (1 sulfur, 10 limes, and 40 waters) can prevent adults from laying eggs; When the larvae are in danger, when fresh urine is found to be out of the boring hole, the tampon is jammed with a cotton ball soaked in 200 times of 80% dichlorvos EC, and then sealed with yellow mud, and the larvae in the hole are fumigated and killed. Second, the apple through the moth 1. Harmful symptoms, larvae feeding on the trunk of the skin. The tunnel is full of russet liquid, and terrapin fine excrement accumulates outside the borehole, causing the tree body to flow and the tree vigor to weaken. 2. Control methods. When the trunk is excreted by worms and excreted russet juice, the larvae can be manually extirpated. Before germination, 50% dichlorvos EC is applied to the larvae to kill the larvae that had fallen into the skin. Month) Spray 80% dichlorvos EC 800 to 1000 times to eliminate adult and early hatching larvae. Spray 15 times every other day. Third, Sang Baixi 1. Harmful symptoms. Adults and nymphs suck sap on the trunks, causing the branches to wither and even whole trees to die. 2. Control methods; scrape old bark in winter to eliminate overwhelming parasites; throw away clay diesel emulsion (1 part diesel + 1 part fine clay + 2 parts water) smear the trunk to kill the body; 5 Baume degrees before germination Lime-sulfur mixture can be killed by injecting 0.3, Baumedu lime sulfur, or spraying 20% ​​cypermethrin cream 3000 times before each generation of newly hatched nymphs has not formed a shell. Fourth, Daqingyejing 1. Hazardous symptoms. The larvae suck the sap of the leaves and leaves, causing the leaves to turn yellow, early leaves falling, and weakening the tree. The adult lays eggs in the bark, causing damage to the trunk, increasing the amount of water evaporated, and affecting the safe wintering of the tree. 2. Control methods. To remove weeds from orchards and nurseries, spray 90% fenvalerate 1500-2000 times from September to October to kill nymphs and adults.