CN111296455A

CN111296455A - Compound herbicide

Info

Publication number: CN111296455A
Application number: CN202010251191.4A
Authority: CN
Inventors: 梅凤月
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-06-19

Abstract

The invention discloses a compound herbicide which is characterized by comprising active ingredients, wherein the active ingredients consist of haloxyfop-R-methyl and bromoxynil octanoate, and the weight ratio of the haloxyfop-R-methyl to the bromoxynil octanoate is 1: 100-100: 1. The compound herbicide is used for preventing and controlling annual weeds in garlic fields, has obvious weeding effect, is safe and friendly to environment, and has obvious synergistic effect. The herbicide is a herbicide for the first double hoe of the seedling of garlic field, and the formula is simultaneously suitable for the liliaceous crops and medicinal materials such as Chinese chives, onions and the like. The compound herbicide has the characteristics of good weeding effect, wide weed control spectrum, long lasting period and small dosage, so that the pesticide application cost of farmers is reduced, and the economic benefit is improved.

Description

Compound herbicide

Technical Field

The invention relates to the technical field of herbicides, in particular to a compound herbicide.

Background

Haloxyfop-P-methyl belongs to aryloxy phenoxy propionate herbicides, can be quickly absorbed by leaves of gramineous weeds after being treated by stems and leaves, is conducted to the whole plants, is accumulated in plant meristems, inhibits acetyl coenzyme A carboxylase in plants, and leads to the inhibition of fatty acid synthesis to kill the weeds. Such as: and (4) self-growing corn seedlings.

Bromoxynil octanoate is known by the chemical name (2, 6-dibromo-4-cyanophenyl) -octanoate and the generic name bromoxynoliconoate. The contact-type herbicide is selectively absorbed by leaves, conducts extremely limited conduction in plant bodies, and rapidly necroses plant tissues by inhibiting various processes of photosynthesis, including inhibition of photosynthetic phosphorylation reaction and electron transfer, especially Hill reaction of photosynthesis, so as to achieve the purpose of weed control and accelerate withering of leaves at high temperature. Has better control effect on descurainia sophia, chenopodium album, shepherd's purse and chickweed.

The field tests show that the combination of certain herbicides can reduce the damage to crops. Meanwhile, due to different action principles of different herbicides, the occurrence of weed resistance can be delayed and the weed control spectrum can be expanded; the herbicide can enhance the pesticide effect to a certain extent, reduce the dosage and reduce the residue, and is more friendly to soil and environment.

Disclosure of Invention

In view of the above, the present invention aims to provide a compound herbicide with good weeding effect, wide weed control spectrum, long persistent period and small dosage for the weeds in garlic fields lack of post-emergence herbicides, especially for the weeds in the gramineae and broadleaf holly leaf weeds, so as to reduce pesticide application cost of farmers, improve economic benefits and solve the problem of current inconvenience of the farmers. In particular to a compound herbicide prepared from haloxyfop-R-methyl and bromoxynil octanoate.

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

the compound herbicide is characterized by comprising active ingredients, wherein the active ingredients consist of haloxyfop-methyl and bromoxynil octanoate, and the weight ratio of the haloxyfop-methyl to the bromoxynil octanoate is 1: 100-100: 1.

Preferably, in the compound herbicide, the compound herbicide is prepared into dispersible oil suspending agents, water dispersible granules, suspoemulsions, powders, missible oils and aqueous emulsions by active ingredients and auxiliary materials.

Preferably, in the compound herbicide, the auxiliary materials are an emulsifier and xylene.

Preferably, in the compound herbicide, the compound herbicide comprises a compound of the two components and a compound preparation containing the two components.

Preferably, in the compound herbicide, the invention is mainly used for preventing and controlling annual gramineous weeds and broadleaf weeds in garlic fields.

Through the technical scheme, compared with the prior art, the invention has the beneficial effects that:

① the weeding range is wide, and annual gramineous and broadleaf weeds in the garlic field can be well controlled;

② solving the current situation that the garlic field is short of post-emergence herbicide;

③ the compound preparation is safe to Bulbus Allii;

④ the two effective components have synergistic effect compared with the two single preparations.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to verify that the two effective components of haloxyfop-methyl and bromoxynil octanoate are compounded to have good synergistic effect, the applicant

Firstly, experiments are carried out under the condition of potted plants at room temperature, the weeding effect of the two effective components after mixing in different proportions is measured, and the combined action is evaluated.

In the experiment, grass weeds such as brome and broadleaf weeds such as descurainia sophia are selected as target weeds.

Highly effective haloxyfop solution: 11.13g of 97 percent high-efficiency haloxyfop original medicine, 10g of emulsifier and the balance of dimethylbenzene are accurately weighed and evenly stirred to obtain 10.8 percent high-efficiency haloxyfop emulsifiable solution which is diluted to a certain concentration for later use.

Bromoxynil octanoate solution: 25.77g of 97% bromoxynil octanoate is accurately weighed, 10g of emulsifier is added, the rest is supplemented by dimethylbenzene, and the mixture is stirred uniformly to obtain 25% bromoxynil octanoate emulsifiable solution which is diluted to a certain concentration for later use.

Blank control solution: 10g of emulsifier and 100g of xylene.

The test method is as follows: the activity of the mixed pesticide on sparrow wheat and descurainia sophia is tested by a gowing method, quantitative soil is filled in a plastic pot with the height of 7cm and the diameter of 10cm, 20 seeds of the tested weed are uniformly sown in the plastic pot, fine sandy soil with the thickness of 0.5-1cm is covered, the plastic pot is placed at room temperature (about 7 ℃) for sunlight culture, the prepared raw pesticide solution is compounded and diluted into pesticide liquid with a certain concentration gradient, the spraying treatment of stems and leaves is carried out when the weed grows to the 3-5 leaf stage, 1ml of pesticide liquid is sprayed in each pot, each treatment is repeated for 4 times, and a blank solution is used as a control. After the treatment, the test material is placed in room temperature for culture, the growth condition of weeds is observed regularly, the damage symptom and the growth inhibition condition of target weeds are observed visually after 30 days, the fresh weight of the plant is weighed, and the fresh weight inhibition rate (%) is 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 prevention effect on weed inhibition after two effective components are mixed, E is an actual measurement prevention effect on weed inhibition after the two effective components are mixed, X is the prevention effect on target weeds under the dosage of haloxyfop-R-methyl, Y is the prevention effect on the target weeds under the dosage of bromoxynil octanoate, C is a combined action coefficient of a mixed preparation and is used for evaluating the synergistic action of the two effective components, the synergistic action is realized when the C is more than 5 percent, the antagonistic action is realized when the C is less than 5 percent, and the addition action is realized when the C is +/-5 percent.

Table 1 results of the raw test of herbicidal activity against brome with different ratios of haloxyfop-R-methyl and bromoxynil octanoate:

as can be seen from the table above, the two effective components are compounded, the combined action coefficient (C) is more than 5, and the compound pesticide has good synergistic effect on the control effect of brome.

Table 2 results of the bioassay of herbicidal activity of haloxyfop-R-methyl and bromoxynil octanoate for descurainia sophia, in different ratios:

as can be seen from the table above, the two effective components are compounded, the combined action coefficient (C) is more than 5, and the pesticide composition has good synergistic effect on the control effect of the descurainia sophia.

The above results show that the combination of haloxyfop-R-methyl and bromoxynil octanoate has a good synergistic effect compared with the use of a single medicament, and has a good control effect on common gramineous and broadleaf weeds in garlic 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:

example 1: 8% high-efficiency haloxyfop-methyl-bromoxynil octanoate missible oil

Example 2: 20.5% high-efficiency haloxyfop-methyl bromoxynil octanoate missible oil

Example 3: 20.25% high-efficiency haloxyfop-methyl bromoxynil octanoate missible oil

Example 4: 10.5% high-efficiency haloxyfop-methyl bromoxynil octanoate missible oil

Example 5: 23% high-efficiency haloxyfop-methyl-bromoxynil octanoate missible oil

Example 6: 21.5% high-efficiency haloxyfop-methyl bromoxynil octanoate missible oil

Example 7: 13.5% high-efficiency haloxyfop-methyl bromoxynil octanoate missible oil

Example 8: 26% high-efficiency haloxyfop-methyl-bromoxynil octanoate missible oil

Example 9: 11.5% high-efficiency haloxyfop-methyl bromoxynil octanoate missible oil

The above examples were selected to perform a field efficacy experiment for controlling weeds in garlic fields to verify the effect of the formulation for controlling annual grassy weeds and broadleaf weeds in garlic fields, and simultaneously, the synergistic effect after compounding was determined by comparing with the single agents of haloxyfop-R-methyl and bromoxynil octanoate, and the specific implementation was as follows:

experiment: 23% high-efficiency haloxyfop-methyl-bromoxynil octanoate missible oil (English formulation abbreviation: EC) and different agents for controlling weeds in garlic fields. The test site is Shandong province, Xinghua county, the time is 3, 2019, 15, the field garlic is in the 5-leaf stage, the weeds are in the 5-6-leaf stage, the test agents are prepared according to the above examples, 10.8% efficient haloxyfop emulsifiable concentrate (English formulation abbreviation: EC) and 25% bromoxynil octanoate emulsifiable concentrate (English formulation abbreviation: EC) are used for comparison, and the test is carried out for eleven treatments, wherein each treatment is three times, the cells are randomly arranged, and the area of each cell is 60m & lt 2 & gt. Spraying stem and leaf once, and observing the plant control effect of each medicament 15 days and 30 days after the medicament is applied. Recording weather data of a week, which is as follows:

weather data during the test

The investigation objects are field descurainia sophia and brome, and the visual test shows that the pesticide has no phytotoxicity on field wheat.

The control effect is calculated according to the following formula:

the test results are given in the following table:

the pesticide effect test of 23 percent high-efficiency haloxyfop-methyl-bromoxynil octanoate EC and different medicaments for preventing and controlling weeds in wheat fields comprises the following steps:

from the data, it is obvious that after the high-efficiency haloxyfop and bromoxynil octanoate are compounded, the control effect of all the embodiments on brome and descurainia sophia exceeds 50%, when the active ingredient of bromoxynil octanoate reaches 20 g/mu, and the use amount of the active ingredient of the high-efficiency haloxynil reaches 3 g/mu, the control effect exceeds 85%, compared with two single agents of the high-efficiency haloxynil and the bromoxynil octanoate, the compound preparation has much higher control effect on two weeds, the synergistic effect is obvious, and meanwhile, the control effect of the compounded preparation in 30 days is improved to a certain extent compared with the control effect in 15 days, so that the lasting period of the compounded preparation is prolonged.

In conclusion, after the high-efficiency haloxyfop-methyl and the bromoxynil octanoate are compounded, the composition has very obvious synergistic effect, has obvious control effect on gramineous weeds and broadleaf weeds, prolongs the duration while expanding the weeding spectrum, reduces the medication cost of farmers and improves the economic benefit.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The compound herbicide is characterized by comprising active ingredients, wherein the active ingredients consist of haloxyfop-methyl and bromoxynil octanoate, and the weight ratio of the haloxyfop-methyl to the bromoxynil octanoate is 1: 100-100: 1.

2. The compound herbicide as claimed in claim 1, wherein the compound herbicide is prepared from active ingredients and adjuvants and is in the form of dispersible oil suspension, water dispersible granule, suspoemulsion, powder, emulsifiable concentrate, or aqueous emulsion.

3. The compound herbicide as claimed in claim 2, wherein the adjuvants are emulsifier and xylene.

4. The compound herbicide as claimed in claim 1, which comprises a compound of the two components and a compound preparation containing the two components.