Simple identification of pesticide injury and Solutions

1. Crop injury can be divided into the following categories according to different symptoms: 

(1) spots. Mainly in the plant leaves, sometimes also occurs in the skin on the stem or fruit. A brown spot, macula, and so are several dry spots. 

(2) yellow. The performance of parts of the plant stems and leaves to leaves occurs more. 

(3) deformities. Various organs of the plant injury may occur, a common deformity leaf, clusters, root swelling, ear deformities, deformed fruit and so on. 

(4) withered. This injury usually whole plant performance, largely due to the injury caused by improper use of herbicides. 

(5) production stagnation. Injury caused by slow growth and relatively stiff physiological diseases, the former often have drug spot or other injury symptoms. 

2. Causes injury occurred: crops suffered from years of injury of the situation, resulting in injury has the following main reasons: First, by using the wrong pesticides. Second, the concentration is too high, or the concentration of repeated application of correct operation. Third, in high temperature, humidity, sunshine intensity when spraying. Fourth, a sensitive crop growth stage in the spraying. Fifth, it is inappropriate to mix potions. Sixth, the quality of pesticide formulations and processing related with the injury. 

3. Phytotoxicity remedies: When spraying fields of crops can be found in yellow leaves, leaf spots, growth arrest, plant wilting, deformities and other typical symptoms, we must analyze the reasons for phytotoxicity to adopt appropriate remedial measures. Injury commonly used remedies are: (1) spray washing large amounts of water or slightly alkaline water washing, repeatedly sprayed with water 2 or 3 times, try to plant drugs on the surface to wash off, and by P and K applied. 

(2) quick topdressing fertilizer. In the event of injury to crops, the rapid topdressing urea fertilizer, to increase the nutrients, enhancing the growth of energy crops cultivation. 

(3) spraying the drug alleviate the injury. If crops were oxygen dimethoate, parathion and other pesticides injury, crop spraying in affected 0.2% of borax solution; rapeseed, peanuts, excessive suppression by paclobutrazol, may be appropriate to such spraying Gibberellic acid. (4) removal of part of a more serious injury. Such measures commonly used in fruit trees. 

4. To avoid injury to crops and reducing pesticide measures: (1) the correct selection of pesticides. 

(2) medication, to look at the sky, ground, to see growth of the seedlings, avoid adverse weather sensitive crop varieties and growing period. (3) scientific application of different pesticides. One should strictly follow the prescribed dosage range and are not free to expand and increase concentration. Second, even a one-time spraying to avoid duplication of medication. Three or else chaos mixed pesticides, so as not to exacerbate injury. Fourth, especially in the broad spectrum herbicide herbicides should be spotted on the installation of wind direction and wind shield in the head, so as not to damage adjacent plots of crops. Fifth, we must pay attention to avoid injury to the Xiacha pesticide residues in crops.