2-4D butyl ester herbicide has strong systemic conductivity, good herbicidal spectrum and good herbicidal effect, and low price. It is mainly used to control a variety of annual broadleaf weeds in wheat and corn fields. 2,4-D butyl fat is safe for cereal crops, and has a great killing effect on cotton and other broad-leaved crops. At very low doses, cotton can cause phytotoxicity. The Chinese pesticide net Xiaobian said " How to remedy the phytotoxicity of 2,4D butyl ester herbicide ":
There are three major steps in the remedy for the phytotoxicity of 2,4-D butyl herbicides. Chemical control The phytotoxicity caused by some herbicides and plant growth regulators can be targeted to plant growth regulation after phytotoxicity. The agent is reverse regulated. 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, Relieve phytotoxicity.
2. Irrigation and soil washing, the residual chemicals are drenched into the deep soil. Most chemical agents are not resistant to water scour. If the drug is found to be improper, the spray can be filled with clean water and sprayed repeatedly on the stems and leaves to wash away the residues remaining on the surface of the cotton plant. To reduce the phytotoxicity; when rinsing, the pressure of the sprayer should be sufficient, and the amount of water sprayed should be 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.
Third, the application of fertilizers to remedy the phytotoxicity generally on the production of leaf plaques, leaf edge scorch, plant yellowing and other symptoms of phytotoxicity, increased application of fertilizer or foliar application of green wind 95, Gao Mei Shi, plant power 2003, days Up to 2116, etc., can reduce the degree of phytotoxicity. 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.
Chinese pesticide Xiaobian Tips: remind farmers to choose a windless sunny day should be sprayed with the herbicide 2,4-D butyl; while paying attention to coordination and surrounding farmland, the appropriate selection of the type of herbicide spraying and adjust the time, missed the plants as much as possible Germination period; when spraying herbicides on nearby farmland, use a directional method to select better drugs to spray pesticides .
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