Sensitivity of crops to common insecticides and fungicides and matters needing attention

1. Sensitivity of common pesticides to crops. 1. Chlorpyrifos is easy to cause drug damage when used in melon seedling stage, and should be avoided in the flowering stage of some crops. 2. The pesticide of triazophos should not be used in sugarcane, and it is easy to cause drug damage. 3. Phoxim is easy to decompose in the light, so avoid using it in watermelon growing period, radish and leafy vegetable seedling stage (or even in growing period), and other crops should avoid using it in strong light. 4. Insecticides containing malathion are sensitive to melons, pears, peaches, grapes, legumes, cruciferae and tomato seedlings. 5. Omethoate and dimethoate pesticides are easy to cause drug damage when used in some varieties of sorghum, mat grass, tobacco, jujube, peach, plum, apricot, cherry, citrus and olive, and should be avoided. 6. Pesticides containing trichlorfon, dichlorvos and dibromophos (precursor of dichlorvos) are sensitive to the seedlings of corn, beans and melons, but harmful to sorghum. 7. Isocarbophos should not be used in fruit trees, vegetables and mulberry orchards. It is easy to produce fallen leaves and fruits when used in peach trees. 8. Shachongshuang and insecticidal single-component pesticides are easy to cause drug damage to cotton, beans and potatoes, and to Cruciferae in summer high humidity season. Shachongshuang has been found to be harmful to citrus in production practice, so it should be used with caution. Second, the sensitivity of common acaricides to crops 1. Triclofenac acaricides are often used, which have chronic drug damage to citrus, which will lead to a large number of fallen leaves in winter (chlorine poisoning); eggplant is particularly sensitive to it. 2. The acaricides composed of triazotin are easy to cause drug damage in the tender shoot stage. 3. Acaricides containing engine oil and diesel oil will cause "flower skin fruit" drug damage when used in the fruit growing period. 4. The application of high concentration of acarine pesticides under high humidity conditions will do harm to the young tissues of citrus. In addition, feedback, generally do not use this kind of acaricides on papaya. 3. Sensitivity of common fungicides to crops 1. When the concentration of triazole fungicides is too high during the vegetative growth period, the plant will grow slowly, and the dwarf leaves will become smaller and thicker, so it should be avoided during the vegetative growth period. At the same time, it will produce deformed fruit when used in the flower and fruit stage of Ziziphus jujuba. 2. Bordeaux solution and stone-sulfur mixture will cause drug damage in the growing period of many crops. 3. Chinese cabbage is sensitive to copper preparation, so copper preparation should not be used on Chinese cabbage. 4. Inorganic copper preparation is prohibited in flowering and young fruit stage of fruit trees, and should be used cautiously in high temperature and high humidity weather. At the same time, it can not be mixed and used randomly. 5. The fungicide with high content of chlorothalonil is not suitable to be used in persimmon and pear trees, which is easy to cause drug damage. 6. The compound preparation with high sulfur content is sensitive to cucumber, soybean, potato, peach, pear and grape. It should be used at high temperature to reduce the concentration or not. 7. Arsenic preparation will cause drug damage during the growing period of persimmon and the use of melons, and it will last for a long time, so it should be avoided in these crops.