Some farmers must be interested in the methods of preventing peach diseases and insect pests. Let me tell you. Pest and disease control of peachesPeach trees have many diseases and pests. Common methods of disease and pest control are: Pest Control 1. Red spider It mainly absorbs the sap from the leaves, causing small green spots to appear on the leaves, which gradually expand and become connected, and finally all the leaves turn yellow and fall off, seriously affecting the tree vigor and yield, and the quality is extremely low. 2. Prevention and treatment methods In spring, after the overwintering peach trees emerge from the ground and before they sprout, use 5-degree lime sulfur mixture to spray the whole garden to kill the overwintering insect eggs. When the adults appear after sprouting, spraying with 0.2 to 0.3 degree lime sulfur mixture is effective in killing the adults. After the peach blossoms bloom and fade, use 500 times of chlordimeform solution or ultra-low-dose chlordimeform oil to spray and kill the insect eggs. You can also use 1000 times of 4% trichlorodicol solution to have a good effect on various insect pests. How to prevent and control aphid disease in peachesIt harms the young cotyledons of peach trees, greatly hindering their growth and spreading viruses and bacteria. Prevention and treatment methods Before the peach trees sprout, spray 5% lime sulfur mixture or use 4%-5% mineral oil emulsion to kill overwintering insect eggs. During the peak hatching period of overwintering eggs, spray with 40% dimethoate emulsion, and during the growth period, use 25% cypermethrin 500 times dilution for better results. Peach disease prevention and controlRot Symptoms: In the early stage of the disease, the diseased area is slightly sunken, and rice-sized colloid can be seen on the outside. Soon the number of gum spots increases, the epidermis becomes wet, the cortex rots, the lesions become yellow-brown, and have a wine lees smell, and soon the woody part also rots. Cause: This disease is caused by a weak parasite. It is most likely to occur when there are many wounds and dead skin tissues, the tree is weak, and the disease resistance is reduced. Frost damage to peach trees is an important factor in the disease. Low-lying terrain, poor drainage, improper cultivation and management, and excessive fertilizer and water are all prone to this disease.Prevention and treatment methods: Strengthen field management, enhance tree vigor and improve resistance. In the early stage of fruiting, properly adjust fertilizer and water to avoid excessive growth, pay attention to diseases and insect pests on trunks and branches, and minimize wounds. When burying young trees, the ground should be kept relatively dry, and the trunks and branches should not be buried in excessively wet soil. The soil thickness should be appropriately thickened to prevent frost damage. After pruning the peach orchard, thoroughly remove diseased branches and debris in the orchard and burn them outside the orchard to reduce the source of infection. If scars are found, treat them promptly by applying 50 times arsenic solution to the affected area.Gum disease: This is a common disease of stone fruit trees, mainly affecting branches, trunks and fruits. The damage is severe after the disease occurs, especially peach trees are the hardest hit. Symptoms: Gummosis occurs on different trunks and branches of peach trees, and the symptoms vary. After the pathogen infects the new shoots of the year, a protrusion appears in the center of the lenticels. On old trunks and branches, a 1-2 cm "flowing" protrusion often appears. The diseased part can ooze brown gum, causing the trunk and branches to rot.Gummosis is caused by fungal infection, which lasts a long time. It begins when the temperature is 15 degrees and invades the peach tree through wounds, side buds and fruit stalks. Prevention and control methods: Frost damage is an important cause of gummosis. Peach trees should be carefully buried in the soil during the winter to prevent frost damage to the trunk and branches. In production, field management should be strengthened to enhance tree vigor, reduce wounds, and protect wounds in time to minimize the occurrence of diseases. After the disease is found, the lesions should be scraped off in time, and the wounds should be disinfected with 5-degree lime sulfur mixture or 1% formaldehyde solution, and then applied for protection. After scraping off the lesions, the wounds can also be dehydrated and washed with edible alkali, and then smeared with gentian violet for good results. During the growth period, 50% carbendazim diluted 1000 times, spray once every half a month, and spray 4-5 times for good results [1]. |
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