Pesticide phytotoxicity refers to the harmful damage caused to plants by the application of pesticides. The link that causes phytotoxicity is the use of pesticides for spraying, seed dressing, soaking seeds, soil treatment, etc.; the causes of phytotoxicity are excessive concentration of the drug, excessive dosage, improper use or some crops are allergic to the agent; Affect the growth of plants, such as defoliation, falling flowers, fruit drop, yellowing of leaves, leaf stalks, burns, deformities, lengthening and plant death, etc., sometimes reducing the yield or quality of agricultural products. Pesticide phytotoxicity is divided into acute phytotoxicity and chronic phytotoxicity. Acute phytotoxicity: refers to the symptoms manifested within a few hours to 10 days after application, usually occurs quickly, and the symptoms are obvious. Most of them are spots, chlorosis, burns, wilting, falling flowers, fruit drop, leaf curl deformity, and tender tissue of young plants. Chronic phytotoxicity: Symptoms of phytotoxicity will occur within dozens of days after application, and the symptoms are not obvious, mainly affecting the physiological activities of the crop. Such as yellowing, slow growth and development; deformity, small fruit, inferior fruit and so on. In addition, some pesticides have a long residual period in the soil, such as green huanglong, methonone and other herbicides , which easily affect the growth of the squat crop. This is also a manifestation of chronic phytotoxicity. 30 pesticides that are susceptible to phytotoxicity 1 Mancozeb Not suitable for the young fruit stage of edamame, litchi, grape, tobacco, cucurbitaceae crops, high concentration, easy to produce phytotoxicity 2 Propiconazole Inhibition of growth seedling stage, easy to reduce seedling rate, seedling rigidity 3 Pentachloronitrobenzene It is easy to produce phytotoxicity when the young shoots are in contact 4 Chlorothalonil High concentration produces phytotoxicity to pear, persimmon, peach and plum 5 Malignant Cannot be mixed with strong acid agents 6 Chunleimycin Slightly toxic to soybeans and alfalfa 7 sulfur Not easy to use for cucumbers, beans, potatoes, peaches, plums, pears, grapes 8 Oil emulsion Germination and flowering are used with caution and cannot be mixed with stone sulfur mixture 9 Spring thunder oxygen copper It is not easy to produce brown spots with the concentration of apple, grape, soybean and alfalfa. 10 Bordeaux mixture Easy to produce phytotoxicity before germination 11 Stone sulphur mixture It is easy to cause phytotoxicity to young tissues of grape, peach, pear, plum, plum, apricot and other fruit trees. 12 2,4 drops of butyl ester For dicotyledonous plants such as cotton, beans, vegetables, and rapeseed, large, wheat, and rice seedlings should not be used before and after jointing. 15 Alkyn Seedlings and young shoots are sensitive to the drug under high temperature and high humidity conditions, and are prone to phytotoxicity. 16 Triazole tin When the concentration is usually used in the low temperature period, it will have a lighter phytotoxicity on the young leaves of the spring shoots, and it will also cause falling flowers, fallen leaves and falling fruits. 17 Malathion Tomato seedlings, melons, cowpeas, sorghum, cherries, pears and apples are hanged 18 Dimethoate, omethoate Concentration assembly makes the leaves not close at night 19 Sulphur Cruciferous vegetables and high jealousy 20 Phoxim Cucumber, green beans, watermelon cucumber, green beans, watermelon twenty one Triazophos Sugar cane, white diamond, corn bogey twenty two Chlorpyrifos Chlorpyrifos is very sensitive to tobacco and lettuce, and should not be used for melon seedlings. twenty three Killing phosphorus Flowering, high temperature can not be used 25 Profenofos Cruciferous vegetables and walnuts can not be used 26 Trichlorfon Sorghum, beans, melon seedlings, corn, apples cannot be used 27 Isoprocarb Potato crops cannot be used 28 Buprofezin If the liquid is exposed to the leaves of cabbage, radish, etc., brown spots or whitening may occur. 29 Insecticidal double Cruciferous vegetable seedlings such as beans, cabbage, and cabbage cannot be used 30 Flurazine Brassica vegetables and other cruciferous vegetables can not be used at seedling stage Mate Tea Strainer Straw,Stainless Steel Mate Tea Straw,Resable Drinking Mate Tea Straw,Colorful Mate Tea Straw YANGJIANG VOSSEN INDUSTRY AND TRADE CO.,LTD , https://www.cnvossen.com