Herbicide for controlling resistant weeds in wheat field

Abstract

The invention relates to a herbicide for controlling resistant weeds in the wheat field, and relates to the technical field of processing and application of pesticide preparations. The weeding activecomponent of the herbicide is tembotrion, and different auxiliary materials are added to prepare a suspension, a suspoemulsion, a dispersible oil suspension, a wettable pulvis, a water dispersible granule, a granule or any pesticide preparation type. The herbicide can effectively control the resistant weeds mainly including bromegrass, Aegilops tauschii, Lolium multiflorum Lamk., Alopecurus myosuroides, bluegrass, Descurainia Sophia, Veronica didyma Tenore, shepherd's purse, Erysimum cheiranthoides and cleavers.

Description

technical field [0001] The invention relates to the technical field of pesticide preparation processing and application, in particular to a wheat field herbicide and the application of the herbicide to control sulfonylurea weeds in wheat fields. Background technique [0002] Tembotrione, molecular formula C 17 h 16 CIF 3 o 6 S, chemical name 2-(2-chloro-4-methanesulfonyl-3-[(2,2,2-trifluoroethoxy)methyl]benzoyl)cyclohexane-1,3dione. The original drug is a beige powder with no special smell. The melting point is 123°C, the cut-off point is about 150°C, the degree of decomposition in water is pKa=3.18, and the solubility in water (20°C): pH=4 solubility 0.22g / L, pH=7 solubility 28.30g / L, pH=9 solubility 29.69g / L; solubility in organic solution (20°C), ethanol 8.2g / L, toluene 75.7g / L, n-hexane 47.6g / L, dimethyl sulfoxide > 600g / L, ethyl acetate 180.2g / L, acetone 300-600g / L, dichloromethane>600g / L. The chemical structural formula is as follows: [0003] [0004]...

AI Technical Summary

Problems solved by technology

[0005] At present, weeding in wheat fields is faced with many problems: 1. Due to the long-term use of the broad-leaved weeds Tribesulfuron-methyl and Bensulfuron-methyl, the resistance of the dominant broad-leaved weeds Artemisia solani and shepherd’s purse in wheat fields is common, and some areas have reached 200- 1500 times the level of resistance, the original medicine can no longer control its harm

2. The succession of weed communities in the field is becoming more and more serious due to cross-regional operations of farming machinery and seed allocation, etc. Some grass weeds and some malignant weeds gradually become dominant weeds, such as knotty wheat, ryegrass multiflora, and large spike Look at wheatgrass, pig vines, etc. The following problems are that the existing conventional wheat field herbicides have unsatisfactory control effects, and difficult-to-control weeds are becoming more and more harmful

3. Herbicide injury occurs from time to time

As is well known to those skilled in the art, isoxadifen has no herbicidal activity and is often used as a herbicide safener, so it does not have a synergistic effect with tembotrione. The addition of isoxadifen in the reference document increases the cost of medication and meaningless

Images