CN115152785A

CN115152785A - Weeding composition containing cloransulam-methyl for alfalfa field

Info

Publication number: CN115152785A
Application number: CN202210942609.5A
Authority: CN
Inventors: 孙兰兰; 苏旺苍; 杨共强; 徐洪乐; 薛飞; 吴仁海
Original assignee: Institute of Plant Protection of Henan Academy of Agricultural Sciences
Current assignee: Institute of Plant Protection of Henan Academy of Agricultural Sciences
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2022-10-11
Anticipated expiration: 2042-08-08
Also published as: CN115152785B

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to a weeding composition containing cloransulam-methyl for alfalfa fields. The active ingredients of the weeding composition containing the chlorantraniliprole for the alfalfa field are compounded by the chlorantraniliprole and penoxsulam or diclosulam. The compound of the chlorantraniliprole and the penoxsulam or the diclosulam shows synergy in a certain mass ratio range, compared with a single component, the weeding composition can improve the weeding effect on purple alfalfa field weeds, especially the weeding effect on purple alfalfa Tian Lichang, can reduce the application dosage and the application frequency of pesticides on the basis, can avoid the generation of phytotoxicity to a certain degree, and is beneficial to developing novel herbicides.

Description

Weeding composition containing cloransulam-methyl for alfalfa field

Technical Field

The invention belongs to the technical field of pesticides, and particularly relates to a weeding composition containing cloransulam-methyl for alfalfa fields.

Background

Alfalfa (Medicago sativa) is a perennial herb of leguminous plants, has the advantages of high yield, rich protein, excellent grass quality, strong biological nitrogen fixation capacity, good palatability and the like, and plays an irreplaceable role in animal husbandry, particularly in dairy cow industry. The weeds in the alfalfa field are serious, particularly the malignant weeds such as eleusine indica, digitaria sanguinalis, eclipta prostrata and cyperus rotundus grow rapidly, the prevention and control are difficult, and the yield and the quality of the alfalfa are seriously influenced. At present, chemical agents are mainly used for controlling weeds in alfalfa fields, such as quizalofop-p-ethyl, imazethapyr, clethodim and the like, but with the gradual increase of the drug resistance of the weeds, the control effect of the existing chemical agents on the weeds is gradually reduced. Although the effect of preventing and killing weeds can be improved by increasing the pesticide spraying dosage, the pesticide damage to alfalfa is easy to generate, and the growth of alfalfa is influenced, so that the development of a novel herbicide is necessary.

The chloracetyl phosphinothricin (CAS accession number 215655-76-8) belongs to a substituted phenoxyacetyl hydroxyphosphonate compound, is a herbicide which is researched and developed by Master university of China and has independent intellectual property rights, has the action mechanism of a strong inhibitor of a pyruvic acid dehydrogenase system, and has the characteristics of low toxicity, low residue and environmental safety. Chinese patent CN97109095.5 discloses substituted phenoxy acetoxyl hydrocarbyl phosphate with herbicidal activity and preparation thereof, and specifically discloses a specific structure of cloransulam-methyl for use as a herbicide to prevent and kill various agricultural weeds.

Chinese patent CN201811217426.7 discloses a herbicide composition containing clofenphos and application thereof, and particularly discloses that the combination has higher activity after the clofenphos and a plurality of active components are compounded, and the weed control effect is improved. China CN2012100112699.4 discloses a binary compound wheat field herbicide and a use method thereof, and particularly discloses that when clofenphos and tribenuron-methyl are compounded, the herbicide has a remarkable synergistic effect and improves the weed control effect of descurainia sophia and the like in a wheat field.

At present, no report related to the compounding of the chlorantraniliprole and the penoxsulam or the diclosulone is found.

Disclosure of Invention

The invention aims to provide a weeding composition containing cloransulam-methyl for alfalfa fields, wherein 2 effective components of the weeding composition show a synergistic effect when compounded, and the weeding effect on alfalfa fields can be improved.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention aims to provide a weeding composition containing cloransulam-methyl for alfalfa fields, which is prepared by compounding the cloransulam-methyl and penoxsulam or diclosulam.

Preferably, the mass ratio of the chlorantraniliprole to the penoxsulam is 1-10:60-1.

Preferably, the mass ratio of the chlorantraniliprole to the diclosulam is 1-40:15-1.

The invention also provides a herbicide containing the chloracetyl glufosinate for the alfalfa field, which comprises the weeding composition containing the chloracetyl glufosinate for the alfalfa field and an agriculturally and pharmaceutically acceptable auxiliary agent.

Preferably, the herbicide is in the form of emulsifiable concentrate, ultra-low volume liquid, wettable powder or suspending agent.

Preferably, the herbicide further comprises a safener selected from one or more of benoxacor, fenclorim, clomazone, fenchlorazole, mefenpyr-diethyl, furilazole and other safeners known in the art.

Compared with the prior art, the invention has the following beneficial effects:

(1) The compound of the chlorantraniliprole and the penoxsulam or the diclosulam shows synergy in a certain mass ratio range, compared with a single component, the weeding composition can improve the weeding effect on purple alfalfa field weeds, especially the weeding effect on purple alfalfa Tian Lichang, can reduce the application dosage and the application frequency of pesticides on the basis, can avoid the generation of phytotoxicity to a certain degree, and is beneficial to developing novel herbicides.

(2) The action mechanisms of the cloransulam-methyl and the penoxsulam or diclosulam-methyl for preventing and killing weeds are different, so that the generation of drug resistance of the weeds can be delayed, and the drug resistance risk caused by single use of a single active ingredient is reduced.

Detailed Description

The invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the description of the embodiments is only for illustrating the present invention and should not be taken as limiting the invention as detailed in the claims.

Example 1: screening of weed control medicament for alfalfa field

1. The tested weeds: snakehead gut (Eclipta prostrata) seeds are collected in alfalfa bases of He Bo Cao Shi Limited company of estuary river 5363 of the garden of Heji district of Zheng city.

2. Reagent to be tested: 93 percent of cloransulam-chorifolium technical, 98 percent of penoxsulam technical and 95 percent of diclosulam-chorifolium technical, which are all sold in the market.

Dissolving the test agent with dimethyl sulfoxide solvent, diluting with 0.1% Tween-80 water solution to obtain single mother liquid, setting multiple groups of mixture ratios, and setting 6 mass concentration gradients for use.

3. The test method comprises the following steps: reference to part 4 of the pesticide indoor bioassay test guidelines herbicides of NY/T1155.4-2006: activity measurement test Stem and leaf spray method

Soaking weed seeds to be tested for germination acceleration until the weed seeds are exposed to white, uniformly sowing the weed seeds in plastic pots (15 cm multiplied by 11cm multiplied by 7cm, the bottoms of the plastic pots are perforated) with 30 seeds per pot, covering fine soil with 0.5-1cm after sowing, transferring the weed seeds into a greenhouse for conventional culture, and keeping the soil moist; after the seedlings of the weeds emerge regularly, the seedlings are fixed to 20 plants in each pot, when the seedlings of the weeds grow to the 3-leaf stage, a walking spray tower is used for spraying a test solution to stems and leaves of the seedlings of the weeds, each treatment is repeated for 5 times, 0.1% Tween-80 aqueous solution is used as a blank control for treatment, and the treated seedlings are moved into a greenhouse for continuous culture. Weighing the fresh weight of the overground part of the weed 14 days after the application of the herbicide, and calculating the fresh weight control effect.

4. And (3) data analysis: DPS software is adopted to carry out data statistical analysis on the liquid medicine concentration logarithm value and the control effect probability value to obtain a toxicity regression equation and ED of the medicament on the target ₅₀ Values, and the co-toxicity coefficient (CTC) was calculated according to the grandsinope method.

5. Measurement results

And evaluating the synergism of the medicament according to the calculated co-toxicity coefficient (CTC), wherein the antagonism is the CTC of less than or equal to 80, the additivity is the CTC of more than 80 and less than 120, and the synergism is the CTC of more than or equal to 120, and the results are shown in tables 1-3.

TABLE 1 toxicity assay results of cloransulam-chlorophenoxylate and penoxsulam in ecliptic

As can be seen from Table 1, in the range of 1-10: within the mass ratio range of 60-1, the co-toxicity coefficient to snakehead intestine after the cloransulam-cloransulam and the penoxsulam are compounded is 132.01-752.68, which is more than 120, so that the cloransulam-cloransulam and the penoxsulam show a synergistic effect to snakehead intestine after being compounded, and particularly when the mass ratio is 1:5, the co-toxicity coefficient reaches 752.68, and the synergistic effect is particularly remarkable.

TABLE 2 toxicity test results of the combination of cloransulam and diclosulam on snakehead intestine

As can be seen from Table 2, the ratio of 1-40:15-1, the co-toxicity coefficient to snakehead intestine after the clofenphos and the diclosulam is between 146.69-545.34 and is all larger than 120, which shows that the clofenphos and the diclosulam show synergistic effect to snakehead intestine after being compounded.

In conclusion, the cloransulam-methyl and the penoxsulam or the diclosulam-methyl are compounded to have synergism on the eclipta prostrata within a certain mass ratio range, and compared with a single component, the control effect on the purple alfalfa Tian Lichang can be improved, so that the application amount of pesticide can be reduced, and the generation of pesticide injury can be avoided to a certain extent.

The foregoing is only a preferred embodiment of the invention and modifications, which are within the scope of the invention, will be apparent to those skilled in the art without departing from the principles of the invention.

Claims

1. A weeding composition containing penoxsulam for alfalfa fields is characterized in that the effective components of the weeding composition are compounded by penoxsulam and penoxsulam or diclosulam.

2. The weeding composition containing penoxsulam for alfalfa field according to claim 1, wherein the mass ratio of the penoxsulam to the penoxsulam is 1-10:60-1.

3. The weeding composition containing the chlorantraniliprole for the alfalfa field as claimed in claim 1, wherein the mass ratio of the chlorantraniliprole to the diclosulam is 1-40:15-1.

4. A herbicide containing cloransulam-methyl for alfalfa fields, which comprises the cloransulam-methyl containing herbicidal composition for alfalfa fields as claimed in any of claims 1 to 3 and an agriculturally pharmaceutically acceptable adjuvant.

5. The herbicide containing the chlorophenoxyacetic acid phosphine for the alfalfa field as claimed in claim 4, characterized in that the formulation of the herbicide is missible oil, ultra-low volume liquid, wettable powder or suspending agent.

6. The herbicide containing cloransulam-methyl for use in alfalfa fields as claimed in claim 4, characterized in that the herbicide further comprises a safener.