Measures to improve the control effect of wheat straw star and isoproturon

Wheat straw star and isoproturon are ideal herbicides to control weeds in wheat fields, but some farmers report that they are not effective in weeding. The main reasons are as follows:

First, isoproturon can only control Gramineae weeds such as Niangmai and hard grasses in wheat fields, but it has no effect on broad-leaved miscellaneous workers such as big nest vegetables and pig calamities in wheat fields. If isoproturon is used alone, the residual density of broad-leaved weeds in wheat field must be very high, which shows that the weeding effect is not good, but the control effect of Maicaoxin on weeds in wheat field is obviously different.

Second, when the medication period was not appropriate, the best short-term control of weeds in wheat field was from one-leaf to two-leaf stage of Gramineae weeds, and the weed control effect decreased significantly when used too early or too late.

Third, the herbicidal effect of wheat grass star and isoproturon is closely related to soil moisture. After treatment, the soil is moist or moist, and the efficacy is brought into full play. The weeding effect of isoproturon is significant. After drought, the weeding effect of isoproturon will be greatly reduced, and the weeding effect is poor.

The fourth is the influence of the quality of medication and soil preparation on the efficacy. The amount of water sprayed by wheat straw star and isoproturon must be sufficient, and the application must be uniform and thoughtful, so as to ensure the effect of weeding. At the same time, the quality of land preparation is also very important. If the soil is extensive, the soil mass is large, and spraying can not touch these places. It is conceivable that there must be more weeds in the field, and the weed control effect is poor.

Fifth, the weed density in the field is too high, it should be said that the weed control effect of isoproturon is obviously better than that of green Malone, but when the weed density in the wheat field is too high, even if the weed control effect reaches 90%, there are still 1000 weeds in the wheat field after treatment, which shows that the weed control effect of isoproturon is not complete.

Sixth, isoproturon has no obvious effect on weeds in wheat field dominated by Kentucky bluegrass, because Kentucky bluegrass has strong drug resistance, most soil treatment agents are ineffective to it, but after rotation with broad bean, tea treatment or sterilizing herbicide treatment is used.