CN112244035A

CN112244035A - Weeding composition containing halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro

Info

Publication number: CN112244035A
Application number: CN202011152497.0A
Authority: CN
Inventors: 陈琦
Original assignee: Anhui Runnongtenghui Biotechnology Co ltd
Current assignee: Anhui Runnongtenghui Biotechnology Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-01-22

Abstract

The invention provides a weeding composition containing halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro, wherein the active ingredients comprise halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro, and the mass ratio of the halosulfuron-methyl, the fluroxypyr and the 2-methyl-4-chloro is 1-20:1-30: 1-75. The fluroxypyr can be fluroxypyr meptyl ester; the 2-methyl-4-chloro can be sodium salt, potassium salt, dimethylamine salt or isooctyl ester thereof. The weeding composition can be used for preventing and removing annual weeds in the paddy field and has obvious synergistic effect.

Description

Weeding composition containing halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro

Technical Field

The invention belongs to the field of herbicides, and particularly relates to a weeding composition containing halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro and application thereof.

Background

Halosulfuron-methyl is a sulfonylurea herbicide, is an inhibitor of acetolactate synthase (ALS enzyme), and the effective components can diffuse rapidly in water, and are absorbed and transferred to the root and leaf of weeds, so as to hinder the biosynthesis of amino acid, lysine and isoleucine and prevent the division and growth of cells. The growth function of the sensitive weeds is hindered, young tissues are yellowed early to inhibit the growth of leaves, and the growth and necrosis of roots are hindered, so that the sensitive weeds are mainly used for preventing and killing broad leaf weeds and cyperaceae weeds. Fluroxypyr is a pyridyloxyacetic acid systemic-conductive post-emergence selective herbicide. The herbicide can be absorbed by plants quickly, so that sensitive plants have typical hormone herbicide response, and the plants are deformed, twisted and dead. Can prevent and kill off annual broad-leaved weeds such as cleavers, descurainia sophia and capsella bursa-pastoris. The 2-methyl-4-chloro herbicide is a phenoxy carboxylic acid selective hormone type systemic herbicide and is mainly used for preventing and treating broadleaf weeds and cyperaceae weeds in paddy fields.

The pesticide registration number PD20152431 discloses 40% 2-methyl fluroxypyr missible oil, and the pesticide registration number PD20110671 discloses 42% 2-methyl fluroxypyr missible oil, which has a good control effect on annual broadleaf weeds.

CN201510119197 discloses a weeding composition containing halosulfuron-methyl and fluroxypyr, the effective components of the weeding composition consist of halosulfuron-methyl and fluroxypyr or ester compounds thereof, wherein the amount of the fluroxypyr ester compounds is 1: 10-5: 1 by weight of the halosulfuron-methyl and the fluroxypyr in terms of the amount of the fluroxypyr.

According to the previous investigation of the prior art, no related literature report of compounding halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro exists in the prior art. In addition, as known in the art, the single use of the composition for a long time easily causes the drug resistance of weeds, pollutes the environment, and the research and development of a 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.

Disclosure of Invention

The weeding composition containing halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro and the application thereof have a remarkable synergistic effect. The specific technical scheme is as follows:

a weeding composition containing halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro is prepared from the components of 1-20:1-30:1-75 by mass. The preferable mass ratio of the halosulfuron-methyl, the fluroxypyr and the 2-methyl-4-chloro is 1-10:10: 30-40; preferably 1-10:10: 30-40.

The weeding composition disclosed by the invention comprises 1-85% of active ingredients in percentage by mass. The preferable mass percentage of the active ingredients is 20-60%.

The weeding composition is mixed with common auxiliary materials on pesticides to prepare any preparation suitable for agriculture. The preferable preparation is dispersible oil suspending agent, missible oil, water dispersible granule, wettable powder and suspending agent.

In the weeding composition, fluroxypyr can be fluroxypyr-meptyl; the 2-methyl-4-chloro can be sodium salt, potassium salt, dimethylamine salt or isooctyl ester thereof.

The weeding composition provided by the invention is used for preventing and removing weeds in paddy fields. Preferably the weeds are annual broadleaf and sedge weeds.

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

the compound composition of the halosulfuron-methyl, the fluroxypyr and the 2-methyl-4-chloro compound has synergistic combined effect on cleavers.

The combination of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro shows different combined effects on the special-shaped sedge. When the mass ratio of the halosulfuron-methyl, the fluroxypyr and the 2-methyl-4-chloro is 0.1-0.5:1:3-4, the synergistic effect is shown.

The compound composition of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro has good control effect on weeds in paddy fields, namely, monochoria vaginalis, cleavers, descurainia sophia and cyperus heterophyllus.

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

Example 1: indoor determination of cleavers by compounding halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro

The tested weeds: cleavers are collected in the field, mature seeds are collected, cultured in a laboratory, desensitized and then stored.

Reagent to be tested: a halosulfuron-methyl technical, a fluroxypyr technical and a 2-methyl-4-chloro technical; is commercially available.

The test method comprises the following steps: accurately weighing the test medicament, and dissolving a small amount of acetone to prepare high-concentration mother liquor. When in application, Tween-80 aqueous solution with mass fraction of 0.1% is respectively diluted into the required dosage for test, and Tween-80 aqueous solution with mass fraction of 0.1% without medicament is used as blank control.

A greenhouse potting method is adopted. The soil for the test is special soil for the test collected from the land without medicine. Filling soil special for the test into a flowerpot; the flowerpot is placed in a basin for containing water, and soil is kept moist by adopting an infiltrating irrigation mode at the bottom of the basin. Sowing a certain amount of cleavers seeds in a flowerpot, and covering the flowerpot with 1cm of soil. And (3) seedling and plant fixing are carried out in the 2-leaf period, 25 cleavers with consistent growth potential are kept in each pot, and the cleavers are treated when the cleavers grow to the 3-4 leaf period. Preparing a series of single agents with different concentrations and mixtures with different proportions. The stem and leaf spray treatment was carried out using a potter spray apparatus (liquid spray amount: 45mL/m2), and the treatment was repeated 4 times. After treatment, the mixture is placed in a greenhouse for normal management, the growth condition of the cleavers is regularly observed, after 14 days, the fresh weight of the overground part of the cleavers is weighed, the fresh weight inhibition rate is calculated, a linear regression equation and ED50 with different combinations are solved according to the relationship between the fresh weight inhibition rate and the medicament concentration, and the combined action type of the three on the cleavers is evaluated.

And (4) analyzing results: the compound composition of the halosulfuron-methyl, the fluroxypyr and the 2-methyl-4-chloro compound has synergistic combined effect on cleavers.

TABLE 1 indoor determination results of compound composition of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro for cleavers

Example 2: indoor determination of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro compounded special-shaped sedge

The tested weeds: collecting mature seeds in the field, carrying out laboratory culture, and preserving after desensitization treatment.

Test agents and test methods: reference is made to example 1.

And (4) analyzing results: the combination of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro shows different combined effects on the special-shaped sedge. When the mass ratio of the halosulfuron-methyl, the fluroxypyr and the 2-methyl-4-chloro is 0.1-0.5:1:3-4, the synergistic effect is shown.

TABLE 2 indoor determination results of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro compounded composition on special-shaped sedge

EXAMPLE 3 formulation

45% halosulfuron-methyl fluroxypyr-2-methyl-4-chloro missible oil

3% of halosulfuron-methyl, 8.5% of fluroxypyr, 33.5% of 2-methyl-4-chloro, 1601# 5% of agricultural milk, 500# 8% of agricultural milk and methyl oleate, wherein the total amount is 100%.

42% halosulfuron-methyl fluroxypyr-2-methyl-4-chloro wettable powder

2% of halosulfuron-methyl, 10% of fluroxypyr, 30% of 2 methyl 4 chloride, 3% of polycarboxylate, 4% of calcium lignosulfonate, NN 06%, 2% of white carbon black and 100% of kaolin.

Example 4 determination of the field efficacy of the combination of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro

And (3) test crops: weeds in rice fields: herba Monochoriae, herba Galii Teneri, herba Euphorbiae Humifusae, and herba Cymbopogonis Citrari.

The application method comprises the following steps: setting 2 medicament treatments, 1 blank control and repeating for 3 times; the area per cell was 20m2, and the random arrangement was made. And (4) carrying out soil spraying treatment by adopting a sprayer. And 7d after the application of the herbicide, investigating the weed fresh weight control effect.

And (4) analyzing results: the compound composition of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro has good control effect on weeds in paddy fields, namely, monochoria vaginalis, cleavers, descurainia sophia and cyperus heterophyllus.

Table 3 herbicidal Effect of the compounded preparations on paddy fields

The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that modifications may be made without departing from the invention as claimed in the invention and these modifications are within the scope of the invention.

Claims

1. A weeding composition containing halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro is characterized in that the mass ratio of the halosulfuron-methyl, the fluroxypyr and the 2-methyl-4-chloro is 1-20:1-30: 1-75.

2. The weeding composition according to claim 1, wherein the mass ratio of halosulfuron-methyl, fluroxypyr and 2-methyl-4-chloro is 1-10:10: 30-40; preferably 1-10:10: 30-40.

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 1 to 85% by weight.

4. A herbicidal composition according to claim 3, characterized in that the active ingredient is present in an amount of 20-60% 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 a dispersible oil suspension, emulsifiable concentrate, water dispersible granules, wettable powder, suspension concentrate.

7. A herbicidal composition according to any one of claims 1 to 66, wherein fluroxypyr is fluroxypyr meptyl; the 2-methyl-4-chloro is sodium salt, potassium salt, dimethylamine salt or isooctyl ester thereof.

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

9. Use of a herbicidal composition according to claim 8, characterized in that the weeds are annual broadleaf and sedge weeds.