CN110856489A

CN110856489A - Compound herbicide

Info

Publication number: CN110856489A
Application number: CN201810958933.XA
Authority: CN
Inventors: 杨会营; 刘晓娇
Original assignee: Yanhua Yongle (leting) Biological Technology Co Ltd
Current assignee: Yanhua Yongle (leting) Biological Technology Co Ltd
Priority date: 2018-08-22
Filing date: 2018-08-22
Publication date: 2020-03-03

Abstract

The invention relates to a compound herbicide containing triafamone, which comprises two active ingredients of the triafamone and the bebutamid in a weight ratio of 1:60-60: 1. The invention has wide weeding spectrum, obvious weeding effect and safety to crops.

Description

Compound herbicide

Technical Field

The invention belongs to the field of pesticides, and particularly relates to a compound herbicide containing triafamone and bebutamid.

Background

Triazolam (ipfenbacazone), development code: HOK-201, a triazolinone herbicide for paddy fields, is highly effective on gramineous weeds, annual sedges and some annual broadleaf weeds, particularly on barnyard grass, has long duration and is highly safe even when applied to rice transplantation. The triazolam has strong control effect on barnyard grass weeds by inhibiting cell division and cell growth. It can cause short, little tillering, yellowing, distortion and finally death of barnyard grass weeds. The triazolyl oxamide is applied before or after emergence of weeds, and has excellent control effect on annual weeds such as barnyard grass, cyperus heterophyllus and strangles and perennial weeds such as Chinese iris, cyperus hybridus and the like. The triazolyl oxamide is highly safe to rice in a transplanting period, wide in weed control spectrum and long in lasting period of barnyard grass weeds. The mefenacet is a new tool for preventing and removing weeds in paddy fields, can be flexibly applied, is highly safe to rice, and saves time and labor for rice planters. The structural formula is as follows:

bromobutyric acid (bromobutamide) belongs to anilide herbicides, and can effectively prevent and kill annual weeds such as barnyard grass, monochoria vaginalis, motherwort, arthroncus and perennial weeds such as thin-rod Chinese iris, bodhi feltwort, eleocharis tuberosa, cyperus esculentus and Guapian. Even under the dosage of less than 0.1-0.2 kg/ha, the effect of preventing the thin-rod firefly iris is still high. The product has excellent selectivity between rice and weeds, and in field test, the product is mixed with some herbicides to obtain excellent effect of preventing and killing barnyard grass and palmleaf weeds. The product inhibits cell division and has a slight effect on photosynthesis and respiration. The structural formula is as follows:

at present, the herbicide is often used out of specifications, the problems of drug resistance and phytotoxicity are generated in many places, and great influence is generated on soil. According to the field test, the herbicide mixture can well overcome and reduce the phytotoxicity. Meanwhile, after the two herbicides are compounded, a certain synergistic effect can be achieved, the weeding spectrum is enlarged, and the influence on soil can be reduced. Therefore, the two effective components of the triazolyl oxamide and the bebutamid are compounded to achieve the effect.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the weeding composition with good weeding effect, wide weeding spectrum, high safety performance, obvious yield increasing effect, convenient application and low toxicity. In particular to a compound herbicide of triazolyl oxamide and beflubutamid.

The weight ratio of the compound herbicide to the mefenacet is 1:60-60:1, preferably in a weight ratio of 1: 30-30: 1, more preferably in a weight ratio of 1: 10-10: 1.

the formulation of the invention can be prepared by the compound herbicide and the addition agent known to the technical personnel in the field by the method known to the technical personnel in the field. The dosage forms which can be processed by the composition are suspending agent, dispersible oil suspending agent, wettable powder, water dispersible granule and granule.

① the two herbicides are compounded, not only the weeding effect is good, but also the weed control spectrum is wide, the herbicide is safe to rice, the two active ingredients are compounded, the effect is faster and better, and the herbicide has good control effect ② compared with the existing single agent, the duration is improved, and the synergistic effect is achieved after compounding, so that the use amount is reduced, the pollution to the environment is reduced, no cross resistance exists between the two components ③.

Detailed Description

The applicant firstly carries out weeding tests on the two effective components of the triazolam and the bebutamid under the condition of a room-temperature pot culture so as to evaluate the weeding effect of the two components in a compounded mode. According to the weeding spectrums of the two effective components, the raw objects are barnyard grass and Chinese iris, and the specific implementation conditions are as follows:

test agent solution: accurately weighing a certain weight of technical materials of the triazolyl oxamide and the bromobutyric acid amide, dissolving the technical materials by using a proper amount of dimethylformamide, adding the technical materials into clear water containing 0.1 percent of Tween 80 emulsifier, and stirring the technical materials uniformly to obtain a solution containing a certain effective component. Blank control solution: an equivalent amount of dimethylformamide was added to an equivalent amount of 0.1% tween 80 emulsifier in water.

The test method is as follows: the activity of the mixed medicament on barnyard grass and Chinese iris is detected by a gowing method, the test soil is quantitatively loaded to 4/5 parts of a pot, the soil is completely moistened by adopting a pot bottom infiltrating irrigation mode, the preprocessed mixed grass seeds for testing are uniformly sown on the surface of the soil, and then 0.5 cm-2 cm of soil is covered according to the size of the seeds. And performing soil spraying treatment after seeding for 24 hours. Each treatment was repeated 4 times, using a blank solution as a control. After treatment, the mixture is placed in a greenhouse for conventional culture, and water is supplemented in an infiltrating irrigation mode at the bottom of the pot. And recording dynamic temperature and humidity data in the greenhouse during the test by using a temperature and humidity digital recorder. After 21 days, the herbicidal activity was recorded, the fresh weight of the plant was weighed, and the fresh weight inhibition (%) was calculated.

The action evaluation method is used for evaluating the combined action mode of the herbicides according to the gowing method, and the formula is as follows:

E₀(％)＝X+Y×(100-X)/100

C＝E-E₀

in the formula E₀The herbicide composition is a theoretical control effect on weed inhibition after two effective components are mixed, E is an actual measurement control effect on weed inhibition after the two effective components are mixed, X is the control effect on target weeds under the dosage of the triazamide, Y is the control effect on the target weeds under the dosage of the bromobutylachlor, C is a combined action coefficient of a mixed preparation and is used for evaluating the synergistic action of the two effective components, when C is more than 10 percent, the synergistic action is realized, when C is less than 10 percent, the antagonistic action is realized, and when C is +/-10 percent, the additive action is realized.

TABLE 1 raw test results of herbicidal activity against barnyard grass with different proportions of triazolam and bebutamid

As can be seen from the table 1, after the triazolyl oxamide and the bebutamid are compounded, the effect of preventing barnyard grass is good, the combined action coefficient (C) is greater than 12, and the synergistic effect of the two effective components after being compounded is obvious.

TABLE 2 crude test results of herbicidal activity of triazolyl oxamide and beflubutamid on Fluoritan in different proportions

As can be seen from the table 2, after the triazolyl oxamide and the bebutamid, the compounded composition has good control effect on the firefly iris, the combined action coefficient (C) is greater than 12, and the synergistic effect of the two effective components after the two effective components are compounded is obvious.

The two bioassay tests show that compared with the action of a single agent, the compound of the triazolyl oxamide and the bromobutachlor has a good synergistic effect on the control effects of the barnyard grass and the Chinese iris, and the compound of the two agents solves the problem of poor control effect of the single agent on certain weeds, and has a good control effect on common weeds in paddy fields.

The present invention will be described in further detail below with reference to specific examples, but the present invention is by no means limited to these examples. The percentages in the formula are weight percentages, and the used raw medicines and the auxiliary agents are purchased by other manufacturers. Examples of formulations are as follows:

the first embodiment is as follows: 30.5% triazolyl oxamide-bebutamid wettable powder

Example two: 31% triazolyl oxamide-bebutamid water dispersible granule

Example three: 22% triazolyl oxamide-bebutamid dispersible oil suspension

Example four: 14% triazolyl oxamide-bebutamid suspension

Example five: 20% triazolyl oxamide-bebutamid dispersible oil suspension

Example six: 30% triazolyl oxamide-bebutamid water dispersible granule

Example seven: 30% triazolyl oxamide-bebutamid suspension

Example eight: 15% triazolyl oxamide-bebutamid suspension

Example nine: 24% triazolyl oxamide-bebutamid dispersible oil suspension

Example ten: 28% triazolyl oxamide-bebutamid suspension

Example eleven: 22% triazolyl oxamide-bebutamid wettable powder

Example twelve: 31% triazolyl oxamide-bebutamid suspension

Example thirteen: 30.5% triazolyl oxamide-bebutamid suspension

The above examples were selected to perform field efficacy tests for controlling paddy field weeds for verifying the effect of controlling paddy field weeds, and the control effects of the examples were determined by comparing the results with a single dose of mefenacet and a single dose of beflubutamid. The specific implementation is as follows:

herbicide tests for preventing barnyard grass and Chinese iris with preparations such as 15% triazolyl oxamide-bromobutachlor suspending agent and the like. And (4) performing field drug effect test and drug effect evaluation according to 'field drug effect test criteria'. The control effect is calculated according to the following formula:

TABLE 3 Medicinal effect test of triazamide and bebutamid in different proportions for preventing and treating paddy field weeds

The data clearly show that the compound preparation of the triazolyl oxamide and the bromobutylachlor has the control effect of more than 90% on two common weeds of barnyard grass and Chinese iris in 15 days and 30 days, and has very obvious synergistic effect compared with single agents of the triazolyl oxamide and the bromobutylachlor. Meanwhile, after the two components are compounded, compared with a single agent, the weeding composition enlarges the weeding spectrum, improves the synergistic effect, and is safe to rice in the dosage range used in the experiment.

According to field test data, the weeding effect of the compound of the two components of the triazolam and the bebutamid on field weeds is much higher than that of two single agents, the synergistic effect is obvious after the compound, the weeding spectrum is expanded, the pesticide application frequency of farmers is reduced, the labor capacity of the farmers is reduced, and the economic benefit is improved. The present invention can be implemented without significantly departing from the present invention, and the technical features described in the different technical aspects can be combined in any form to form other technical aspects. The above embodiments and examples are illustrative of the present invention, but are not intended to limit the scope of the present invention, and modifications and substitutions may be made without departing from the spirit of the claims.

Claims

1. A compound herbicide is characterized in that: the active ingredients consist of triazolyl oxamide and bromobutyric acid amide, and the weight ratio of the triazolyl oxamide to the bromobutyric acid amide is 1:60-60: 1.

2. the compound herbicide as claimed in claim 1, wherein: the preferable weight ratio of the triazolyl oxamide to the beflubutamid is 1: 30-30: 1.

3. the compound herbicide as claimed in claim 1, wherein: the preferable weight ratio of the triazolyl oxamide to the beflubutamid is 1: 10-10: 1.

4. the compound herbicide as claimed in claim 1, wherein: the active ingredients and the auxiliary materials are prepared into suspending agents, dispersible oil suspending agents, water dispersible granules, wettable powder and granules.