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Second, make up the fertilizer. Generally, the phytotoxicity of the symptoms such as leaf spot, leaf edge scorch, and plant yellowing can be alleviated by applying fertilizer or foliar application of Green Wind 95, Gaomei Shi, Plant Power 2003, Tianda 2116, etc. Degree of harm. For example, when 2,4-D butyl ester phytotoxicity occurs in cotton seedlings, appropriate amount of available nitrogen fertilizer can be applied to promote hair growth and hair growth, so that cotton plants can resume normal growth and development as soon as possible.
Third, chemical control. For the phytotoxicity caused by some herbicides and plant growth regulators, the plant growth regulator can be sprayed in a targeted manner for reverse adjustment after the phytotoxicity. If cotton seedlings are affected by 2,4-D phytotoxicity, foliar application with 30~50ppm gibberellin solution can obviously promote the growth of plants; when cotton produces chlormequat, spray "920" solution or solution. Harmful, can alleviate phytotoxicity.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
Remedial measures for cotton phytotoxicity
First, rinse. Most chemical agents are not resistant to water scouring. If the drug is found to be improperly used, it can be sprayed with water on the sprayer and sprayed repeatedly to wash away the residue on the surface of the cotton plant to reduce the phytotoxicity. When flushing, the pressure of the sprayer should be The amount of water sprayed is large. For the phytotoxicity caused by the cotton field applied by soil and some herbicides, the soil can be immediately washed and the residual agent can be drenched into the deep layer of the soil.
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