How to prevent the damage of Maize herbicides

In order to prevent herbicides from causing drug damage, we must strictly follow the use technology and standardize the operation.

First, according to the corn crop and the control object, select the herbicide, according to the description on the label, find out the name, dosage form, active ingredient content and usage. When using herbicides, the liquid should be sprayed evenly, the walking speed, the width and speed of the spray range should be controlled manually, and the working time is not easy to be too long.

Second, master the technical operation points of herbicide use. It is necessary to achieve "three criteria", "four looks" and "five noes". "three criteria": the time, amount and area of pesticide application are accurate. The herbicide should be sprayed with 2n3 sprayer solution per mu, preferably before 8:30 in the morning and after 5:00 in the afternoon, otherwise it will cause drug damage. "four look": look at the situation of seedlings, grass, weather and soil. It is not easy to apply pesticides to unrooted or thin seedlings: according to the species and growth of weeds; the dosage is in the upper limit when the temperature is low; the dosage is higher in clayey soil and less in sandy soil; no medicine is used in dry soil. "five nots": weak seedlings do not apply pesticides; paddy fields with shallow water less than 3 cm or water deep over heart leaves do not apply pesticides; the soil is too dry to apply pesticides; do not apply pesticides when there is dew on the leaves or in heavy rain; and do not apply pesticides in paddy fields that leak from paddy fields.

Third, the appropriate period of medication. Generally, the safe period of herbicides used after seedling in corn field is 3Mel 5-leaf stage, less than 2-leaf stage or more than 6 leaves, which is not only easy to produce drug damage, but also uneven weeds and poor weeding effect when it is too early, and herbicides with long residual period are also easy to cause drug damage to the next crop.