Acacia wilt disease prevention and control technology

Since the occurrence of Acacia wilt disease is difficult to cure, efforts should be focused on prevention and a comprehensive prevention and control plan should be developed to prevent it from becoming a pestilence.

First of all, it is necessary to strengthen the quarantine of plants and it is forbidden to transport diseased seedlings. When transferring seedlings from other places (including districts and counties), they must have a quarantine certificate issued by the local quarantine department.

Second, we need to ensure that the right place is suitable for the tree and strengthen the management. Acacia is not water-resistant and should be planted in sandy loam soils with high groundwater and good drainage. Seedlings should be disinfected and sterilized before planting, and fertilizer and water management should be strengthened after planting to increase the growth potential of the plants and pay attention to drought resistance. Cut as little as possible, and immediately after the pruning, apply a protective agent for the wound. If more than one-third of the branches of the diseased plant are found to have yellow leaves and dry off, the diseased plants should be removed immediately.

In the group planting Acacia area, once the diseased plant is found, it should be cleared immediately to avoid transmission of germs. After the removal of dead branches, diseased plants and dead plants, they should be destroyed centrally. At the same time, 40% Formamide 50 times ascorbic acid, 2000 times fluid, or 30% Hymexil 500 should be poured into the tree and surrounding soil. The soil is treated with liquid twice to disinfect and prevent the spread of germs. Acacia trees are no longer planted in the affected area and other tree species should be replaced. When pruning the diseased plants, the garden tools such as scissors, hand saws, and taro used by each single plant must be disinfected immediately. They can be soaked in formalin for 10 minutes, and then the next single plant can be used to avoid mutual interference. Infection, expanding the ward.

Finally, it is scientific chemical control. Chemical control is an important part of the prevention and control of Acacia wilt disease. The focus of prevention and control should be on Acacia trees newly transplanted in recent years, and corresponding measures should be taken for different situations.

In the non-pathogenic areas, for the vigorously growing seedlings, no chemical control treatment is performed for the time being. For those seedlings with weak growth, the canopy and the trunk parts should be treated for preventive treatment. All Acacia seedlings in the affected area should be treated with root irrigation and branch spraying. Branch spray can choose 23% solution of ammonia copper 250 to 300 times liquid, 25% of the enemy demulsified oil 800 times, 20% anti-dry Ling agent 400 to 600 times liquid and so on. In order to avoid the resistance of the trees, various drugs should be used alternately, and sprayed once every 7-10 days. It is necessary to spray 2 to 4 times continuously. The root irrigation is recommended to use 30% hymexazol 500 times or to kill 2,000 times the water, in the crown projection area, pouring 2 to 4 kilograms of liquid per square meter, pouring once every 10 days, continuous pouring 3 ~ 4 times, should also pay attention to alternate medication. Irrigation roots and shoots should be used in the early bud buds of Albizia julibrissin.

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