These pesticides are the most susceptible to phytotoxicity

herbicide

Acetochlor

Acetochlor must not be used on watermelon, strawberry or lettuce. Because acetochlor is used on watermelon, strawberry, and lettuce, it can cause phytotoxicity and even kill these crops. In addition, acetochlor should not be recommended on many crops unless acetochlor is registered on such crops, and when used on crops that have already been registered, there is no water accumulation, otherwise it is prone to phytotoxicity. For example, Wones, it is 90% acetochlor, which is registered in rapeseed and cotton, but if there is water, rape, cotton will also cause phytotoxicity or death.

2, rushing grass

Generally, it cannot be used on rice. Although it can be used on rice, it is difficult to grasp because it is difficult to grasp. Therefore, it is not recommended to use it in rice fields.

Insecticide

1, chlorpyrifos

Can not be used in the seedling stage of melons and lettuce to avoid the occurrence of phytotoxicity. Especially in the seedling stage of watermelon, it is absolutely impossible to use chlorpyrifos.

2. Organophosphorus pesticides

Organophosphorus pesticides such as phoxim and triazophos cannot be used on melons, and imidacloprid is not recommended. Pyrethroid pesticides, avermectin and the like are relatively safe, but the concentration should be strictly controlled, otherwise it is easy to cause phytotoxicity. In addition, sorghum is sensitive to many insecticides, such as trichlorfon and dichlorvos, so special attention should be paid to the use of sorghum.

Inorganic copper preparation

For example, copper hydroxide or copper sulfate is forbidden to be used on peach and plum, otherwise it will cause falling flowers and fruit; copper preparations, sulfur-containing preparations (such as sulfur-mixed carbendazim) should not be applied during the flowering and young fruit stages of crops.

Triazole fungicide

Triazole fungicides have a "azole" word fungicide, such as triadimefon, tebuconazole, flusilazole, propiconazole, etc., must be strictly controlled when used, can not increase the dosage, otherwise it will inhibit Crop growth or phytotoxicity.

Acaricide

Acaricides such as alkyne and other acaricides should be strictly controlled when used in citrus shoots, and should not be used less than 3000 times. It is especially easy to produce phytotoxicity on southern honey pomelo.

In addition, it should be noted that acidic pesticides cannot be mixed with alkaline pesticides. Most pesticides are weakly acidic, and only a few pesticides are alkaline. Alkaline pesticides include inorganic coppers, such as copper hydroxide (which can be killed), copper sulfate, and stone sulphur. These pesticides generally cannot be mixed with other pesticides. Because the base and the acid are neutralized, the effect is affected after mixing, or it is likely to cause phytotoxicity. In addition to the high temperature or in the greenhouse, or during the flowering and young fruit season, pay attention to the concentration of the drug, so as not to occur.

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