Rescue measures for phytotoxicity of fruit trees
In the management of fruit trees, good prevention and control of pests and diseases is an important part of capturing high-quality and high-yield fruit trees. However, in the process of fruit tree pest control, due to improper use of drugs, fruit trees often cause phytotoxicity. If the fruit tree is not remedied in time after the phytotoxicity, the fruit tree will be reduced or even rejected. Then, how can the fruit tree be rescued after the phytotoxicity? First, spray water rinse. When the fruit tree is not sprayed for a long time, when the fruit tree has just appeared phytotoxicity, it can be sprayed with water immediately, which can dilute the concentration of chemicals attached to the leaves of the fruit branches, and also wash some pesticides and link the fruit trees. However, it should be noted that the pressure of the sprayer should be sufficient when spraying water, and the amount of water sprayed should be large, so it is better to spray until the blade is wet to drip. Second, spray potassium permanganate solution. According to the test, after the phytotoxicity of the fruit tree, 7000 times of potassium permanganate solution was sprayed immediately for chemical decontamination, which has obvious effects. This is because potassium permanganate is a strong oxidant and has an oxidative decomposition effect on some chemicals. 3. After the phytotoxicity of the fruit trees, in addition to the use of clear water washing and chemical detoxification methods, the orchard management should be strengthened, and the soil should be irrigated in time to make the roots absorb enough water and oxygen to alleviate the phytotoxicity. At the same time, it is necessary to pursue quick-acting fertilizers to promote the growth and development of fruit trees and improve the root activity of fruit trees. The method is: using 0.3~0.4% urea solution to pour the root, and spraying 0.2~0.3% potassium dihydrogen phosphate solution on the foliar surface.
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