In order to increase the application effect of chemical herbicides and reduce the damage to crops and pollution to the environment, farmers should pay attention to the following issues when choosing herbicides.
There are many types of herbicide herbicides on the road, including stem and leaf treatments, soil treatment agents, contact herbicides, and natural herbicides. Some are suitable for pre-emergence weeding and some are suitable for weeding stems and leaves. Therefore, according to different crops, different periods of weeds were selected.
Select the correct method of use such as trifluralin soil treatment (closed) agent see light volatile decomposition, must be sprayed on the surface of the soil, and then cover the soil with cerium in time. The cable can be applied after sowing and before emergence. Dole, fine stable kill can be applied in the weed seedling stage, as long as the appropriate concentration ratio, the crop will be more secure.
Protecting crops from damaging large fields with monocotyledonous weeds should be selected to kill monocotyledonous herbicides (such as Fagodium horrida); for fields with more dicotyledonous weeds, they should be selected to kill Herbicides based on dicotyledons (such as Dupont superstars); if monocotyledons and dicotyledonous weeds are mixed in the field, weed herbicides (such as Maidao, Isoproturon, etc. It should only be applied before winter and early spring.
According to different eco-environment applications, dimethyl tetrachlorine and herbicidal ether are all effective under strong light, but trifluralin is easy to volatilize and reduces the efficacy. In high temperature conditions, due to the strong herbicide activity, the dosage should be reduced. Soil treatment agents have good application effects when soil moisture is high. Soils with a high content of organic matter should have a strong adsorption capacity for herbicides and should be increased in dosage. The sandy soil has a good effect of killing grasses, but it also has heavy phytotoxicity and should reduce the dosage.
Adopt comprehensive measures to improve the effect of weed killing, as soon as possible, except for small ones; secondly, to eradicate the weeds around Tianbian; third, to deep-root tillage and perennial deep-rooted weeds; and fourth, to diligently cultivate and annihilate an annual Weeds.
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