Identification and remedial measures for basic symptoms of pesticides

I. Pesticide Phytotoxicity Symptoms The leaves appear in different colors and shapes (spray spots are mostly small circles) or burnt perforations; leaves are chlorotic (such as chlorhexidine medicinal damage to fruit trees, trichlorobenzene herbicides) Phytotoxicity to crops, etc.; leaf yellowing (such as excessive use of secazine to make soybean leaves turn yellow); leaf burning (such as atrazine on wheat seedlings); leaf deformities (such as dur, pull) The rope twists the corn leaf into a whip, often called the tail of the cow's tail; the leaves fall off.
If there are spots (such as brown spots, spots, etc., Bordeaux can produce rust on apples or pears), abnormal fruit, fruit drop and so on.
Flowers are mainly used before or during flowering, causing flowering, early withering or flashy (such as Bordeaux and oil emulsions, which can cause fruit trees to fall during flowering).
The root causes rotten roots or becomes thicker (such as the phytotoxicity of sodium pentachlorophenolate on rice roots, and the use of 2,4D herbicides in the jointing stage of rice will cause the base of the stem to enlarge); the root hair is sparse.
The main reason is that the germination rate is reduced (such as seed dressing and double-mixed wheat seeds, the dosage of more than 0.5% will reduce the germination rate of wheat seeds).
Second, remedies for remedies 1, irrigation and drainage remedy for some herbicides caused by phytotoxicity, proper irrigation and drainage can also reduce the extent of phytotoxicity, such as the agricultural damage caused by agricultural benefits can be reduced through irrigation and drainage.
2, topdressing remedy generally for the production of leaf phytotoxicity, plant yellowing and other symptoms of phytotoxicity, the application of fertilizer can reduce the degree of phytotoxicity.
3, spray water leaching if the spraying of some pesticides from the foliage and plants, and found early, you can quickly spray a large amount of water on the leaves of the crops, repeatedly spray water 2 to 3 times, try to Wash the drug on the surface of the plant and add phosphorus and potassium fertilizer to promote root development to enhance crop recovery.
4. Hormone Remediation For herbicides and plant growth regulators that inhibit or interfere with gibberellin, such as 2.4D butyl ester, dimethyltetrachloride, and hexalyze, gibberellin can be sprayed to alleviate the degree of phytotoxicity; Crops are tainted by pesticides such as omethoate, and 0.2% borax solution can be sprayed on the affected crops.