Summer corn should be used reasonably in herbicides . It should not be used too much or too little. Excessive use will have a negative impact on corn seedlings. Too little use will not result in herbicidal effect, while the dosage is incorrect, high in drought and high temperature. Wet areas can cause phytotoxicity, so strictly follow the dosage instructions in the instruction manual.
The amount of the soil treatment type before the seedling is 150-250g per mu of land, and the amount of the herbicide type after corn seedling is 80-150g per acre; to avoid the use of medicine at noon or high temperature glare, at this time the volatilization of the agent Strong sex, severe waste, this is the time when the stomata of the weeds are also closed, the absorption of the drug is limited, the drug can not play a good control effect.
If it is sprayed on a sunny day, it should be stopped at 8-10 am in the morning or after 5 pm without dew before sunset. When the wind is strong, the spraying should be stopped. The wind assembly will cause uneven spraying, and it is easy to cause drugs. In addition, do not increase the concentration of the drug, increase the amount of herbicide and reduce the dilution factor of the herbicide will cause damage to the plant leaves.
The phytotoxicity has been rescued in time. The method is to remove the residual herbicide from the corn leaf surface by using water spray to reduce the concentration of herbicide in the corn, reduce the phytotoxicity, and spray some foliar fertilizer when the phytotoxicity is light. Or adjust the agent to alleviate the phytotoxicity. In the later stage, it is necessary to strengthen the management of corn fertilizer and water, and timely replenish the water-saving fertilizer, so as not to cause large-scale losses.
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