Wheat field weeding composition containing metazosulfuron and florasulam

Abstract

The invention discloses a wheat field weeding composition containing metazosulfuron and florasulam. The weeding composition comprises effective components including the metazosulfuron and the florasulam, and the mass ratio of the metazosulfuron to the florasulam is (1-50):(1-50). The weeding composition has synergistic effects, expands a weed control spectrum and is mainly used for wheat field annual weeds including grassy weeds such as amur foxtail, alopecurus japonicus, bromegrass, bluegrass, hard grasses, polypogon fugax and Chinese silvergrass and broadleaf weeds such as crickweeds, cleavers, sun euphorbia herbs, shepherdspurse herbs and lapsana apogonoides. Average decrease rate reaches up to 94.66% 30 days after dosage, and average control rate is 98.89%.

Description

technical field [0001] The invention belongs to the technical field of pesticide herbicides, in particular to a wheat field herbicide composition containing pyrazosulfuron-methyl and florasulam. Background technique [0002] According to the national weed census data report, there are more than 200 kinds of weeds in my country's wheat field, the area of ​​weed damage accounts for more than 30% of the wheat planting area, and the loss accounts for about 15% of the total wheat output. Among them, ox chickweed, swine scorpion, Artemisia persicae, and Dachao are serious hazards. However, with the long-term and large-scale application of herbicides, the problems of weed resistance, population succession and phytotoxicity in chemical weed control in farmland are becoming more and more serious, seriously affecting the high yield of wheat and the safety of subsequent crops. At present, there are some disadvantages in commonly used pesticides in wheat fields: for example, if the sul...

AI Technical Summary

Problems solved by technology

However, with the long-term and large-scale application of herbicides, the problems of weed resistance, population succession and phytotoxicity in chemical weed control in farmland are becoming more and more serious, seriously affecting the high yield of wheat and the safety of subsequent crops

At present, there are some disadvantages in commonly used pesticides in wheat fields: for example, if the sulfonylurea herbicides tribenuron-methyl and bensulfuron-methyl are used too high or too late, they will cause phytotoxicity to subsequent crops such as peanuts and soybeans; phenoxycarboxylic acid herbicides Excessive dosage and improper application of 2,4-D-butyl ester and sodium tetrachloride can easily cause crop damage and drift, which can cause damage to nearby dicotyledonous crops

In addition, if a single herbicide is used for long-term control, although the number of sensitive weeds has decreased, the number of insensitive or malignant weeds has increased, causing changes in the weed community

In the winter wheat producing areas where herbicides are used alone, the weed community in the wheat field has undergone serious changes. The number of malignant weeds that are difficult to control with various herbicides, such as pigtails, lacquer, mother-in-law, and shepherd's purse, has increased year by year, and has seriously affected the Harvest of wheat crop yield

Images