Sensitive crops of various pesticides (collector's edition)
[Phosphos] Sorghum is not suitable for spraying. Corn can only be used to control corn mash. Cucumbers and kidney beans are sensitive to the drug. 50% emulsifiable concentrate is sprayed with 500 times of emulsifiable concentrate, and 1000 times of liquid may also have slight phytotoxicity. Beets are also sensitive to phoxim. For example, when mixing with boring, the dosage and suffocation time should be appropriately reduced. It is sensitive to leafy vegetables at high temperature and easy to burn leaves. The mechanism of chlorosis and other organophosphorus pesticides causing discoloration and other phytotoxicity is that the highly hydrophobic organophosphorus pesticide is adsorbed by the chloroplast or its surrounding tissues, causing the chloroplast function to be disordered, thereby hindering the electron conduction reaction, ie, the Hill reaction, inhibition. Photosynthetic, discoloration occurs, the more serious the phytotoxicity, the lower the carbohydrate content in the body and the relative increase in total nitrogen. 1 Do not mix with alkaline pesticides. 2 The drug is easy to decompose when it is light, and it is best to carry it in the evening when spraying in the field.
[Stone sulphur mixture] peach, plum, plum, pear, grape, beans, potato, tomato, onion, ginger, melon, cucumber, etc. For young plants of grape, peach, pear, plum, plum, apricot and other fruit trees, susceptibility to phytotoxicity should be taken. Use it carefully. It is best to spray it in the deciduous season. Do not use it during the growing season or flowering period. It has certain phytotoxicity to kiwi, grape, cucumber and legume flowers.
[Borde liquid] Potato, tomato, pepper, melon, peach, plum, pear, apple, persimmon, cabbage, soybean, wheat, lettuce, etc., especially sensitive to copper ions, peach, apricot, plum, hawthorn are sensitive in the production season, Should be used with caution.
When the lime in the Bordeaux mixture is lower than the multiple amount, the apple and the persimmon are susceptible to phytotoxicity, and the lime is used in multiples; when the lime is higher than the multiple, the grape is susceptible to phytotoxicity, and the lime is used in half amount. For other tree species, different formulas and ratios should be selected according to their characteristics. For apples that are sensitive to copper and resistant to lime, they can be used in lime or multi-type ratio; pears that are less sensitive to lime and copper can be used in the same amount of lime; sensitive to lime and resistant to copper. The grapes can be matched with a half-size of lime.
When mixing with organic phosphorus, it should be used with caution. After spraying the stone sulfur mixture for 10 days, it can spray the Bordeaux mixture. After spraying the Bordeaux mixture, it takes 20-30 days to spray the stone sulfur mixture.
1 Avoid application on wet days or before the fog is dry to prevent phytotoxicity. Because of the strong permeability of copper sulfate, lime is drenched by rain or dew, and copper ions are left. The copper ions are very corrosive and easily cause damage to leaves and young fruits. Spray in the summer to avoid the hot sun at noon, so as not to cause high temperature damage caused by lime. Spray in the rainy season, increase the amount of lime as appropriate.
2 can not be mixed with alkaline agents, Bordeaux mixture with stone sulphur mixture, bacteriostatic, thiram, Fumei arsenic, etc., or alternate use interval is too short, are easy to produce phytotoxicity.
3 Bordeaux mixture should not be formulated in metal containers.
4 Bordeaux mixture is toxic to silkworms and should not be used on mulberry trees.
5 with the use. Bordeaux liquid preparation: First, pour the dilute copper sulfate into the thick lime milk and stir it while pouring; second, dilute the lime milk and copper sulfate while pouring into the agitated full bucket and pour it Stir it. The preparation method is simple and convenient, and the prepared Bordeaux mixture is slow to precipitate and has good protection effect after use.
[Triazophos] Sugar cane.
[Poisonous death] tobacco.
[thiazinone] cabbage, radish.
[Imidacloprid] beans, melons.
[Petroleum Emulsion] is susceptible to phytotoxicity to certain peach species, preferably in the deciduous season. Enemy dead insects (99.1% mineral oil emulsifiable concentrate) can be mixed with most insecticides and fungicides. It can reduce the evaporation of liquid chemicals, improve the adhesion of pesticides and protect the varieties of insecticides that are susceptible to UV rays. Synergies. It can be mixed with avermectin, Bt, imidacloprid, dichlorfen, Wanling, can be killed, amber and copper sulphate. However, this product should not be mixed with sulphur-containing chemicals, Bordeaux mixture, ketone, carbaryl, chlorpyrifos, sterilized dan, chlorothalonil, and carbendazim pesticides. At the same time, it should be noted that the enemy can not be sprayed within 14 days after spraying the above-mentioned medicament on the fruit tree, otherwise phytotoxicity will occur. Use method First add a certain amount of water in the container, then add the specified amount of enemy insects into the water, and then add enough water. If mixed with other pesticides, mix other pesticides and water before pouring into enemy worms. Do not reverse them. In order to prevent the separation of the drug solution, it should be stirred constantly. In the summer, oil emulsions are used, and some tree species may cause phytotoxicity. They should be tested first.
ã€Rosin Mixture】The use of rosin mixture in summer has obvious phytotoxicity to persimmon, and it has an adverse effect on citrus in spring and summer.
[pineine mixture] deciduous fruit trees are very sensitive to them and should not be used during the summer growing season.
[Mancozeb] Tobacco, Cucurbitaceae, and some pears. When the pear fruit is applied, the mancozeb is prone to fruit spots. High concentrations can cause dead spots on the edges of rice leaves.
[Tubuzin] Dobutin should be avoided when controlling pests and diseases of kiwifruit. It can be mixed with a variety of pesticides, including alkaline agents, but it should not be mixed with copper preparations.
[carbendazim] can be mixed with general fungicides , but it should be used as needed. Cannot be mixed with copper preparations.
[Hypophysic] It is easy to use phytotoxicity to pears and persimmons. Apples cannot be used within 20 days after falling flowers. High concentration produces phytotoxicity to pear, persimmon, peach and plum
[Sulphur] Cucumber, soybean, potato, plum, pear.
[Fluorosilazole] Some pear varieties are sensitive to the young fruit period (before May) and are not used.
[Copper oxide] fruit and young fruit.
[Keite] Pear tree is disabled. The melon, beans and cotton seedlings below 25 cm are diluted no less than 3000 times. Krut has phytotoxicity to the young leaves of citrus spring shoots, resulting in brown spots. If the concentration is too high on the fruit, the amount of the drug will be too large to cause yellow or irregular rings on the fruit surface, which will affect the appearance of the fruit. The use of drugs at high temperatures is prone to sunburn in fruits, and it also affects greening near the umbilicus. It is recommended that the concentration of 73% emulsifiable concentrate on the fruit should not be less than 2500-3000 times, and it should not be mixed with the oil emulsion, otherwise it will cause serious phytotoxicity.
[Triazolyl] 25% triazole tin WP can cause serious flowering, defoliation, and fruit drop in addition to the spring shoots (low temperature), which will cause serious flowering (temperature below 20 °C). Leaves and fruit deformities. It is preferred to use a concentration of 1500-2000 times. Further testing is required for the harm of navel orange.
[Triphosphorous tin] 20% triphosphorus tin emulsifiable concentrate 500-2000 times liquid has phytotoxicity to citrus spring shoots. The fruit used in June had no effect on the peel of Jin Orange and Wenzhou mandarin orange. In the middle of July, 500, 1000 and 2000 times of liquid were applied to the fruits of the above two varieties to have different degrees of phytotoxicity, but 500-65 d after the medicine was removed. In addition to the obvious symptoms on the fruit of Wenzhou mandarin orange, the symptoms of 1000 and 2000 times of liquid phytotoxicity have basically disappeared, and there is basically no effect on the appearance of the fruit. It is best not to spray before the fruit harvest (especially Wenzhou mandarin) 50d.
[Gyromycin (920)] The use of citrus to preserve the fruit and fruit. If the concentration is not well controlled, it will make the fruit smaller, the skin thicker, the acidity, the deformed fruit, etc., reducing the yield and quality.
[Ixazole alcohol] watermelon, soybean, and pepper (physical damage at high concentration).
[Glyphosate and Gram] These two herbicides can only be sprayed and weeded between the rows of fruit trees, and can not be used on the leaves of fruit branches.
[Atsujin] Peach trees are sensitive to them, don't use them. Atrazine has a long-lasting effect and is harmful to the sensitive crops of wheat, soybeans, rice and peach trees. It can be solved by mixing with other herbicides by reducing the amount of drug used. Corn intercropping beans cannot be used.
[butachlor] The application of rice in the early stage of the field caused brown spots.
[Acetochlor] Cucurbitaceae (cucumber, watermelon, gourd) spinach, leeks.
How to relieve plant phytotoxicity
1 Foliar sprayed with water to wash, the leaves suffer from phytotoxicity, and the water can be sprayed several times in the victim to remove or reduce the pesticide residue on the leaves of the crop.
2 sufficient watering, irrigation and detoxification, irrigation and soil washing, while allowing the plant roots to absorb a lot of water, increase cell water, thereby reducing the relative content of drugs in the soil and crops, and play a role in relieving phytotoxicity.
3 cultivating loose soil, promoting root growth, combined with irrigation, application of Jiamei dividend for cultivating loose soil, can promote root development and enhance crop resilience.
4 Partially removed, applied to the flower, fruit or squid for local application or filling, can remove the phytotoxic fruit and the damaged branches, such as the main stem (dry) to produce phytotoxicity should also be combined with the application of Jiamei gold point or water to wash and disinfect.
5 Chasing fulvic acid fertilizer, spraying or combining watering to pursue Jiamei profit can improve the ability of the plant to resist phytotoxicity, and at the same time promote the growth of crop roots.
6 spraying regulators or hormones, plant phytotoxicity spraying regulators or plant hormones, such as paclobutrazol inhibitors or delay agents or 2,4D excess of phytotoxicity, spray gibberellin; copper sulfate phytotoxicity 0.5% quicklime water can be sprayed; the anti-dropping agent can be sprayed once every 3-5 days with 0.5-1% white sugar solution. After 2-3 days, the leaf surface will slowly start to stretch; After the tetrachlorochlorine herbicide, the leaves are whitened, and two bags of Jiameijin point can be watered to 30 kg, and the leaves can be drenched one by one. After 3-5 days, the leaves can be restored to green.
More pesticide knowledge , please pay attention to China Pesticide Network
(Source: Lushan Wufeng)
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