Postemergence weedicidal composition for crops

Abstract

The invention relates to a postemergence weedicidal composition for crops. The postemergence weedicidal composition for the crops has the active components of mesotrione and atrazine in a weight ratio of 15:38. The postemergence weedicidal composition for the crops has the advantages as follows: 1) high weedicidal activity: the postemergence weedicidal composition can kill weeds by two different mechanisms and reduce the resistance generating speed of the weeds, and the two components are synergistic, thus greatly improving the weedicidal activity of the weedicide; 2) broad weedicidal spectrum and long duration: the two weedicides have different weedicidal spectra, the postemergence weedicidal composition prepared by mixing the two weedicides in a specific mixing ratio combines the weedicidal spectra and activities of the two weedicides, so that the postemergence weedicidal composition has a wider weedicidal spectrum and longer duration; 3) delaying of weed resistance: the postemergence weedicidal composition can significantly improve the effect of controlling various resistant weeds, delay the generation of drug resistance of the weeds and prolong the service life of the weedicide; and 4) high safety: the postemergence weedicidal composition is applied to postemergence weeding in a corn field, can control various grassy or broadleaf weeds in the corn field, and is safe to corns and afterreap crops on the premise of improving the weedicidal effect.

Description

technical field

[0001] The invention relates to a herbicide, in particular to a post-emergence herbicide composition containing mesotrione and atrazine. Background technique

[0002] At present, herbicides in cornfields are limited by the safety of crops, and their herbicidal spectrum is also limited. Using a single herbicide alone cannot completely and effectively control the occurrence of weeds in cornfields. If the effective period is too long, the dosage is too large or the application is uneven, it will easily cause residual toxicity to the crops of the current season or the subsequent crops.

[0003] Mesotrione is a preemergence and postemergence broad-spectrum selective herbicide capable of inhibiting hydroxyphenylpyruvate dioxygenase (HPPD), which can effectively control major broadleaf grasses and some grass weeds, but The control effect on grass weeds such as crabgrass is limited, and the price is expensive, and the cost per unit area is high, which limits its po...