阅读说明：本技术 一种包含氟乐灵和丙草胺的除草组合物 (Herbicidal composition containing trifluralin and pretilachlor ) 是由 郭晓刚 汪顺生 廖意凤 于 2020-06-22 设计创作，主要内容包括：本发明提供一种包含氟乐灵和丙草胺的除草组合物,活性成分包含氟乐灵和丙草胺,并且氟乐灵与丙草胺的质量配比为5-30:1-15。本发明的除草组合可用于作物田一年生杂草的防除,具有显著的增效作用。(The invention provides a herbicidal composition containing trifluralin and pretilachlor, wherein the active ingredients comprise trifluralin and pretilachlor, and the mass ratio of the trifluralin to the pretilachlor is 5-30: 1-15. The weeding composition can be used for preventing and removing annual weeds in crop fields and has obvious synergistic effect.)

1. A weeding composition containing trifluralin and pretilachlor is characterized in that active ingredients comprise the trifluralin and the pretilachlor, and the mass ratio of the trifluralin to the pretilachlor is 1-50: 1-50.

2. A herbicidal composition according to claim 1, wherein the mass ratio of trifluralin to pretilachlor is 5-30: 4-15.

3. A herbicidal composition according to any one of claims 1 to 2, characterized in that the active ingredient is present in an amount of 5 to 85% by weight.

4. A herbicidal composition according to claim 3, characterized in that the active ingredient is present in an amount of 25-65% by weight.

5. A herbicidal composition according to claim 3, characterized in that it is mixed with agrochemically customary auxiliaries and is prepared in any formulation suitable for agricultural use.

6. A herbicidal composition according to claim 5, wherein said formulation is selected from the group consisting of emulsifiable concentrate, water dispersible granules, wettable powder, and granules.

7. Use of the herbicidal composition according to any one of claims 1 to 6 for controlling weeds in crop fields.

8. Use of a herbicidal composition according to claim 7, wherein the crop is preferably cotton or rice.

9. Use of a herbicidal composition according to claim 7, characterized in that the weeds are annual weeds.

Technical Field

The invention belongs to the field of herbicides, and particularly relates to a herbicidal composition containing trifluralin and pretilachlor and application thereof.

Background

Trifluralin is a selective aniline pre-emergence soil treatment agent, is mainly absorbed by coleoptile and hypocotyl of weeds, influences the generation and transmission of hormones, and inhibits cell division to kill the weeds. Trifluralin is not effective on emerged weeds, and can be killed only by absorbing the pesticide in the unearthing process after the weed seeds germinate. The trifluralin can effectively prevent and kill annual gramineous weeds and part of broadleaf weeds with small-grain seeds, and has longer lasting period.

Pretilachlor is a selective bud pretreatment agent, is mainly absorbed by hypocotyl, mesocotyl and coleoptile of plants, is slightly absorbed by roots, directly interferes with protein synthesis in weeds, and indirectly influences photosynthesis and respiration to cause weed death. The damaged weed seedlings are twisted, the primary leaves are difficult to stretch out, the color of the leaves turns dark green, and the growth stops until the death. Rice has strong decomposition capability on pretilachlor, so that the rice has certain selectivity. Can effectively prevent and kill annual gramineous weeds and partial broadleaf weeds.

The chemical agent is easy to cause the drug resistance of weeds after being singly used for a long time, causes pollution to the environment, and the research and development of the synergistic composition which can improve the weeding effect and reduce the application dosage of active ingredients is the key point of the research and development of a plurality of pesticide companies in China. In the prior art, no report is provided about the compound use of trifluralin and pretilachlor.

Disclosure of Invention

The invention relates to a herbicidal composition containing trifluralin and pretilachlor and application thereof. The specific technical scheme is as follows:

the active ingredients of the weeding composition comprise trifluralin and pretilachlor, and the mass ratio of the trifluralin to the pretilachlor is 1-50: 1-50.

In the weeding composition, the preferable mass ratio of the trifluralin to the pretilachlor is 5-30: 4-15. More preferably, the mass ratio of the trifluralin to the pretilachlor is 5:1 and 1: 3.

The weeding composition comprises 5-85% of active ingredients in percentage by mass. The preferable mass percentage of the active ingredients is 25-65%; more preferably, the content of the active ingredients is 30-60% by mass

The weeding composition is mixed with common auxiliary materials on pesticides to prepare any preparation suitable for agriculture. Suitable preparations comprise missible oil, water dispersible granules, wettable powder, granules, suspending agents, micro-emulsions, emulsion in water and the like.

The weeding composition provided by the invention is used for preventing and removing weeds in crop fields.

The crops of the invention are preferably cotton or rice. The weeds are annual weeds.

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

the trifluralin and the pretilachlor are compounded to have an obvious synergistic effect, so that the application dosage of active ingredients can be effectively reduced, the generation of drug resistance is slowed down, and the environmental pollution is reduced.

The trifluralin and pretilachlor are compounded to be used for preventing and removing weeds in cotton fields, and when the using dose of the trifluralin and pretilachlor is 45-55g a.i./mu, the effect of preventing and removing the weeds in the cotton fields is more than 90%.

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 illustrative only and should not be taken as limiting the invention as described in detail in the claims