A kind of cornfield herbicide composition

Abstract

The invention relates to a herbicide composition for a corn field. The composition is prepared from the three active components of Tolpyralate, atrazine and carfentrazone, and the active components show the excellent synergistic effect within the weight ratio range of (0.75-12):(22.5-360):(0.5-8); compared with a single preparation, the mixed composition has the advantages that the weeding effect is significantly improved, the using dosage is decreased, and the adverse influence of pesticide to the ecological environment is reduced while the pesticide using cost of farmers is lowered; the herbicide composition not only is obvious in weeding effect, but also is safe to corn and has no influence on succession crops and meets the safety requirements of pesticide preparations.

Description

【Technical field】 [0001] The invention belongs to the technical field of pesticides, and in particular relates to a herbicide composition containing Tolpyralate, which is used for controlling weeds in cornfields. 【Background technique】 [0002] Corn is one of the main food crops in my country. Weeds in corn fields are very serious, and there are many varieties of corn in my country, and the varieties planted in different regions are quite different. The safety of herbicides on different corn varieties has attracted increasing attention. At present, the herbicides used in post-emergence domestic corn fields mainly include: nicosulfuron, rimsulfuron, mesotrione, dicamba, thiasulfuron, bromoxynil, etc., and the mixed preparations include nicosulfuron and atraz Zin, dicamba and atrazine, nicosulfuron and metrizone, etc., but these herbicides are still not completely effective in controlling some malignant weeds, such as Cyperus cyperi, Commelina, and Abutilon. Studies have show...

AI Technical Summary

Problems solved by technology

The herbicidal effect of Tolpyralate is higher than that of mesotrione, fenflumezone or tembotrione. The disadvantage is that the control effect on some broad-leaved weeds is not ideal, and it is ineffective against Cyperaceae weeds

[0012] It has been reported that Tolpyralate is an excellent tank-mixing partner with the commonly used herbicides glyphosate, glufosinate and dicamba; through searching, it has been found that herbicidal compositions containing Tolpyralate or mefentrazone have been disclosed in patent documents, such as patent CN200980149775. 2. The herbicidal composition containing benzoylpyrazole compounds. It is disclosed that Tolpyralate can be compounded with fentrazone or atrazine respectively, but some weeds cannot be controlled by compounding two by two. The compounding of Tolpyralate and fentrazone can Control most weeds, but ineffective against some broad-leaved weeds, Tolpyralate combined with atrazine can effectively control broad-leaved and gramineous weeds, but ineffective against sedge weeds

[0013] Patent CN201110147719.4 is a herbicidal composition containing mefentrazone and triazines, which discloses that mefentrazone can be compounded with atrazine, but the composition is not ideal for the control of gramineous weeds

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