The phytotoxicity refers to the fact that the crop is not properly grown or has physiological dysfunction after administration. The phytotoxicity is acute and chronic. The former showed obvious symptoms, such as burns, wilting, defoliation, falling flowers, and fruit drop, from a few hours to 3-4 days after spraying. The latter occurred after a long time after spraying, such as poor growth, leaf malformation. , late maturity and so on. Common symptoms are foliar appearance of large and small shapes, colorful spots, local tissue scorch, perforation or leaf detachment, or yellowing, chlorosis or thickening of the leaves. What should I do if the fruit farmer’s orchard has phytotoxicity? What methods can be used to remedy this?
1. Spray water on the tree. If found early, the affected plants should be sprayed with water immediately to dilute and wash off the pesticides adhering to the foliage and branches, and reduce the pesticide content in the trees.
2. Spray neutralization. The leaves are damaged. It can be sprayed with 50% humate (dissolved with a small amount of water) to form a 3000-fold solution. After 3-5 days, the leaves will gradually turn green. The copper sulphate ion in the Bordeaux mixture produces phytotoxicity and can be sterilized by spraying 0.5-1% of the lime solution. The stone sulphur mixture is excessively produced to cause phytotoxicity, and on the basis of water washing, 500 times of rice vinegar solution is sprayed.
3, timely topdressing. After the fruit tree suffers from phytotoxicity, it must be topdressed in time to promote the recovery of the affected fruit tree as soon as possible. If the phytotoxicity is caused by acidic pesticides, some grass ash and lime can be applied, and the medicinal damage is 1% bleaching powder for foliar application. For the phytotoxicity caused by alkaline pesticides, acid fertilizers such as ammonium sulfate can be applied. Regardless of the phytotoxicity, foliar application of 0.3% urea solution plus 0.2% potassium dihydrogen phosphate mixture, once every 15-17 days, even spray 2-3 times, can reduce the phytotoxicity.
4, cultivating loose soil. After the fruit trees are tainted, the soil should be loosened (depth 10-15 cm) in time, and the roots should be artificially cultivated to improve soil permeability, promote root development and enhance the recovery ability of the fruit trees themselves.
5. Moderate trimming. After the fruit tree is harmed by the phytotoxicity, it should be trimmed in time and in a proper amount, the dead branches should be cut off, and the dead leaves should be removed to prevent the spread of the dead parts or the infection by the pathogens.
6, with love more to lift or relieve the phytotoxicity.
P10*P10 Transparent LED Screen
P10*P10 Transparent Led Screen,P10 Outdoor Led Display Module,P10 Outdoor Led Display Screen Module,P10 Outdoor Led Display Panel Module
Shenzhen YuGuang New Material Co.,Ltd , https://www.ygsmartfilm.com