I. Pesticide phytotoxicity symptoms Symptoms appear in different colors and shapes of different spots (spray spots are mostly small round) or coke dry perforation; leaf loss of green (such as Guangmiaoling phytotoxicity of fruit trees, trichlorobenzene herbicides Damage to crops, etc.); leaf yellowing (eg, overdose of saiko to yellow soybean leaves); leaf scorch (eg, atrazine on phytotoxicity of wheat seedlings); leaf deformities (eg, dull, pull So that the heart of the corn twists into a whip, often called the tail of a cow's tail); Fruits appear fruity (such as brown spots, stains, etc., Bordeaux liquid can produce rust on apples or pears), abnormal fruit, fruit drop and so on. Flowers are mainly used before flowering or flowering, causing flowering, premature withering or scumming (such as Bordeaux mixture and oil emulsions, etc. in the flowering period will cause fruit trees to fall). The root causes rot or thickening (for example, pentachlorophenol sodium may cause damage to rice roots, and the use of 2,4D herbicides at the jointing stage of rice may enlarge the stem base); the root hairs are rare. The main reason is that the seed germination rate is reduced (such as seed dressing with mixed wheat seeds, the drug amount of more than 0.5% will reduce the germination rate of wheat seeds). Second, the phytotoxicity remediation measures 1, drainage and irrigation remediation for some herbicides caused by phytotoxicity, appropriate irrigation and drainage can also reduce the degree of injury, such as agricultural damage caused by irrigation can be reduced by irrigation and drainage. 2. Top-dressing remediation generally produces phytotoxicity to the leaves, yellowing and other symptoms of the plant. Increasing fertilization can reduce the degree of injury. 3, spray water if it is sprayed by foliage and plants after a certain pesticide and the occurrence of phytotoxicity, and found early, can be quickly sprayed with a large number of fresh water affected by the crop leaves, repeated spraying of water 2 to 3 times, as far as possible Wash off the drugs on the surface of plants and increase the application of phosphorus and potassium fertilizers to promote root development to enhance crop recovery. 4. Hormone remedies For herbicides and plant growth regulators that inhibit or interfere with gibberellin, such as 2.4D butyl ester, dimethyl tetrachlorine, and acetylsilicilic agents, gibberellin can be sprayed to ease the extent of phytotoxicity; Crops are harmed by pesticides such as Omethoate and can be sprayed with 0.2% borax on damaged crops.