Peach Common Diseases, Pests and Prevention in Early Spring

Peach anthracnose and bacterial perforation Peach anthracnose first infiltrated the branches in the early spring, and spread to the flowers and fruits one after another, adding to the danger. At the onset of disease, the diseased area often shows watery spots. As the disease progresses, the lesion expands into a reddish-brown, round or oval shape. The lesions are clearly recessed, and there are obvious concentric rings. When the lesions are wet, they are spotted. It is often accompanied by small vermilion spots, causing a large number of dead fruit branches and fruit rot. In the young fruit stage, the victims were the most severe. Bacterial perforation disease mainly damages the leaves and fruits of peach trees, resulting in perforation of leaves and cracking of fruits, and the diseased area often overflows with bacteria. The prevention and control methods of these two diseases are as follows: Firstly, the diseased branches of the first disease are cut off before and after the buds sprout to eliminate the source of overwintering and prevent the re-infection. Second, the application of phosphate fertilizer and potash fertilizer increase the tree vigor and avoid overcrowding. And too long; third is to spray 1 or 2 times of Bordeaux mixture 1~2 times when the buds are germinating (disable after leaf spreading).

Peach root cancer mainly damages the roots and forms tumors, causing serious malnutrition of peach trees. Plants are short and the quality of fruit is poor. In severe cases, the whole plant dies. The main methods of prevention and control: First, we must strengthen soil management, rationalize fertilization, improve soil, and increase tree vigor. Second, we must strengthen orchard inspections. Excavate topsoil from suspicious diseased plants and use the knife to scrape diseased parts or cut off diseased roots. , And with 1% sodium perchlorate solution for disinfection, root can also be used 20 times liquid soaking root (for diseased seedlings) or rooting (for large trees).

Mulberry silkworm, also known as sang yin scale insect and peach white scale insect, is an important pest that harms peach trees. It mainly harms the peach shoots, branches and fruits, making the tree vigor seriously weakened, affecting fruit yield and quality. The whole tree died. It is possible to spray 1 to 2 times of 5 Baume degrees of lime sulfur or 100 times of oil emulsion before germination to eliminate overwintering female adults. Can also be integrated in the body of the insect when the insecticide is sprayed with a bristly brush and then sprayed to facilitate the penetration of the liquid.

Red-necked hornbills often eat larvae from the dried cortex and xylem of peach branches, weakening their tree vigor and shortening their lifespan. In severe cases, peach trees die. The larvae can be assassinated with iron wire after the damaged parts are found on the branches and on the ground. In addition, it can also be controlled by applying insect infestation. When the larvae enter into the xylem with fresh insect excreta out of the hole of the insect, clear up the hole of the insect. Put 1 piece of aluminum phosphide (1/8 to 0.6 g tablet). /4) Insert into the hole of the insect, then take the slime mass to compact the hole of the compaction insect.

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