Remediation of crop phytotoxicity After the phytotoxicity of crops, remedial measures should be taken according to the specific circumstances, and the losses can be reduced to a minimum.
First, the focal spot. One or two days after the fight, the leaf surface soon appeared chlorotic or chloasma, and in severe cases, the leaves withered and died. Remediation method: If the powder is uneven, use a twig to swipe the plant, or use a sprayer to clarify the water, remove the powder on the plant; fill the field with “horse waterâ€, and pour the other head out to reduce the residual amount in the field. After that, add quick-acting nitrogen fertilizer to promote the growth of new leaves and make up for the damage caused by poison.
Second, deformity. Misuse of metformin or 2,4-D in rice seedlings, misuse of 2,4-D vinegar on cotton, will cause the rice leaves to be "onion-shaped" and the cotton leaves are "chicken-claw", resulting in deformity. Remedy: Apply plant ash or dilute alkali water as soon as possible to reduce phytotoxicity. At the same time, strengthen the management of cultivating, apply nitrogen fertilizer, and restore plant growth as soon as possible.
Third, green plants. Improper pesticides such as rice foot green (zinc arsenate) or rice lin (calcium methyl arsenate) often cause the growth of rice plants to be blocked, and the leaves are dark green and even dry. Remedy: Field irrigation "horse water", clean the leaves with water, appropriate application of ammonia or lime, grass ash and other alkaline substances to reduce phytotoxicity.
Fourth, brown ear. At the heading stage of rice, pesticides such as chlorpyrifos were applied. The amount of the drug was too large or the spray was uneven. The panicles were sticky with excessive pesticides, and the brown rice ears were produced. The cobs, branches and grains showed brown spots. Remedy: Spray water, reduce the amount of drug in the plant, strengthen post management, and reduce losses.
Five, yellowing. The application of pesticides such as chlorinated acaricide powder is too large or unevenly sprayed, causing the leaves to turn yellow or even die. Remediation method: rinse with water to remove excessive adhesion, and apply 3-5 kg ​​of urea per acre to enhance the growth of the plant.
Plant phytotoxicity is often irreversible and remedies are relatively passive. Therefore, it is extremely important to select the pesticide variety in advance and strictly control the method of use and concentration.
First, the focal spot. One or two days after the fight, the leaf surface soon appeared chlorotic or chloasma, and in severe cases, the leaves withered and died. Remediation method: If the powder is uneven, use a twig to swipe the plant, or use a sprayer to clarify the water, remove the powder on the plant; fill the field with “horse waterâ€, and pour the other head out to reduce the residual amount in the field. After that, add quick-acting nitrogen fertilizer to promote the growth of new leaves and make up for the damage caused by poison.
Second, deformity. Misuse of metformin or 2,4-D in rice seedlings, misuse of 2,4-D vinegar on cotton, will cause the rice leaves to be "onion-shaped" and the cotton leaves are "chicken-claw", resulting in deformity. Remedy: Apply plant ash or dilute alkali water as soon as possible to reduce phytotoxicity. At the same time, strengthen the management of cultivating, apply nitrogen fertilizer, and restore plant growth as soon as possible.
Third, green plants. Improper pesticides such as rice foot green (zinc arsenate) or rice lin (calcium methyl arsenate) often cause the growth of rice plants to be blocked, and the leaves are dark green and even dry. Remedy: Field irrigation "horse water", clean the leaves with water, appropriate application of ammonia or lime, grass ash and other alkaline substances to reduce phytotoxicity.
Fourth, brown ear. At the heading stage of rice, pesticides such as chlorpyrifos were applied. The amount of the drug was too large or the spray was uneven. The panicles were sticky with excessive pesticides, and the brown rice ears were produced. The cobs, branches and grains showed brown spots. Remedy: Spray water, reduce the amount of drug in the plant, strengthen post management, and reduce losses.
Five, yellowing. The application of pesticides such as chlorinated acaricide powder is too large or unevenly sprayed, causing the leaves to turn yellow or even die. Remediation method: rinse with water to remove excessive adhesion, and apply 3-5 kg ​​of urea per acre to enhance the growth of the plant.
Plant phytotoxicity is often irreversible and remedies are relatively passive. Therefore, it is extremely important to select the pesticide variety in advance and strictly control the method of use and concentration.
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