CN112998023A

CN112998023A - Weeding composition containing isoxaflutole and diuron

Info

Publication number: CN112998023A
Application number: CN202110267394.7A
Authority: CN
Inventors: 王丽娟
Original assignee: Zibo Xinnongji Crop Science Co ltd
Current assignee: Zibo Xinnongji Crop Science Co ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-06-22

Abstract

The invention provides a weeding composition containing isoxaflutole and diuron, which is characterized in that: comprises the following components in parts by weight, wherein the weight ratio of the isoxaflutole to the diuron is 0.1-10: 1-50; the weeding composition can be used for preventing and controlling weeds in a sugarcane field.

Description

Weeding composition containing isoxaflutole and diuron

Technical Field

The invention belongs to the field of pesticide herbicides, and particularly relates to a weeding composition containing isoxaflutole and diuron and application thereof.

Background

The isoxaflutole belongs to a HPPD inhibitor herbicide, is a novel herbicide capable of treating soil and stem leaves, can be quickly decomposed in plants and soil, can be absorbed and conducted by root systems, sprouts and stem leaves of weeds to play a role, has a good control effect on most of gramineous and broadleaf weeds in corn fields, and has the characteristics of wide weed control spectrum, quick response, safety to crops, environmental friendliness and the like.

The diuron internal absorption conduction type herbicide is absorbed by the roots and leaves of the weeds and then conducts in vivo to inhibit the Hill reaction of photosynthesis, so that the weeds are yellow and withered. Is used for preventing and killing annual weeds.

The invention aims to screen the weeding composition with obvious synergistic effect, provides scientific basis for safely and reasonably using the herbicide in sugarcane production, and provides reference for alternate pesticide for preventing and controlling weeds.

Disclosure of Invention

The invention particularly relates to a composition containing isoxaflutole and diuron. The specific technical scheme is as follows:

a herbicidal composition comprising isoxaflutole and diuron characterized in that: comprises the following components in parts by weight, wherein the weight ratio of the isoxaflutole to the diuron is 0.1-10: 1-50. The preferable weight ratio of the isoxaflutole to the diuron is 0.5-2.5: 10-40. The preferable weight ratio of the isoxaflutole to the diuron is 1.5:10, 1.5:20, 2.5:10, 2.5:20 and 2.5: 40.

The weeding composition also comprises auxiliary materials which can be used in pesticides; the percentage content of the active ingredients is 1-80%.

The formulation of the composition is missible oil, suspending agent, wettable powder, water dispersible granule, granule and dispersible oil suspending agent.

The weeding composition is used for preventing and controlling weeds in a sugarcane field. Preferably the weeds are broadleaf weeds and grassy weeds; particularly preferred weeds are piemarker, chickweed, cocklebur, green bristlegrass, crabgrass.

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

the mass ratio of the isoxaflutole to the diuron is 1.5:10, 1.5:20, 2.5:10, 2.5:20 and 2.5: 40; the E-E0 values are all larger than 10%, and the compound composition has obvious synergistic effect on the green bristlegrass; can effectively reduce the dosage of active ingredients and reduce the generation of drug resistance of weeds. And when the dosage of the compound medicament is 25-40 ga.i./mu, the control effect is more than 88%. And the field observation shows that the fertilizer is safe to sugarcane crops.

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: combined action test of isoxaflutole and diuron compounding on green bristlegrass

1.1 test target

The green bristlegrass herb is used as a test object, and a plurality of mature and full seeds in the last year are taken for standby.

1.2 culture conditions

The test is carried out in an artificial intelligent climate chamber, the temperature in the daytime is 25-30 ℃, the temperature at night is 20-25 ℃, and the relative humidity is 67-80%. Selecting a plurality of plastic pots with the diameter of 30cm, adding a proper amount of moist sterilized loam, completely moistening the soil by adopting a pot bottom infiltrating irrigation mode, uniformly sowing the pretreated weed seeds for testing on the soil surface, covering soil for 0.5cm, supplementing water by adopting a pot bottom infiltrating irrigation mode after sowing, reserving 20 plants per pot of thinning and carrying out spray treatment at the 2-3 leaf stage of green bristlegrass.

1.3 pharmaceutical agent treatment

Carrying out directional stem leaf spraying treatment according to the designed dosage, automatically controlling a spraying tower by using an ASS-4 spraying instrument, correcting the liquid spraying amount before the test, carrying out stem leaf spraying treatment in sequence from low dosage to high dosage according to the test design, repeating the treatment for 4 times, and setting a 0.1% Tween-80 aqueous solution sprayed with a corresponding organic solvent as a blank control.

1.4 investigation and statistics

The growth state of the tested weeds is observed and recorded regularly after the treatment, and the weeds on the overground part are harvested 7 days after the treatment, and the weeds are weighed as fresh weight. And (4) carrying out data statistics according to the standard of the ministry, and testing and judging the compounded herbicide by using a Gowing method.

Fresh weight calculation formula: r ═ (X0-X1)/X0 × 100; in the formula: r is growth inhibition rate, X0 is control fresh weight, and X1 is treatment fresh weight.

The gowing method: the theoretical control effect of each mixing treatment on weeds is calculated by a formula E0 ═ X + Y-XY/100, the actual control effect is subtracted from the corresponding theoretical control effect to calculate an E-E0 value, the E-E0 value is synergistic when the E-E0 value is greater than 10%, the E-E0 value is antagonistic when the E-E0 value is less than-10%, and the E-E0 value is additive when the E-E0 value is between-10% and 10%.

1.5 results and analysis

TABLE 1 Combined action of isoxaflutole and diuron on green bristlegrass

As can be seen from Table 1, the combination of isoxaflutole and diuron has additive or synergistic effect on green bristlegrass; when the mass ratio of the isoxaflutole to the diuron is 0.5+10, 0.5+20, 0.5+40 and 1.5+ 40; exhibit an additive effect; when the mass ratio of the isoxaflutole to the diuron is 1.5+10, 1.5+20, 2.5+10, 2.5+20 and 2.5+ 40; the E-E0 values are all larger than 10%, and the synergistic effect is obvious. The synergistic mechanism of the composition is complex, and isoxaflutole and diuron which are the same active ingredients in the table 1 show different synergistic effects under different dosage; the mechanism of which remains to be studied.

Example 2 field control of a combination of isoxaflutole and diuron against weeds in sugarcane fields.

2.1 test site

In the sugarcane test field, main target weeds comprise piemarker, chickweed, cocklebur, green bristlegrass and crab grass.

2.2 test Agents

25% isoxaflutole diuron suspension

5% of isoxaflutole, 20% of diuron, 20% of Morwet D-4254%, 2% of calcium dodecyl benzene sulfonate, 5% of sodium lignosulfonate, 1.5% of magnesium aluminum silicate, 4% of glycerol, 2.5% of an organic silicon defoamer and the balance of deionized water to 100%.

34.5% isoxaflutole diuron suspending agent

4.5% of isoxaflutole, 30% of diuron, Morwet D-4255%, NNO 3%, 3% of sodium lignosulfonate, 2% of magnesium aluminum silicate, 5% of glycerol, 2.5% of an organic silicon defoamer and the balance of deionized water to 100%.

2.3 design of the experiment

The field dosage of the reagent is shown in table 2, the area of each treatment cell is 50m2, the treatment cells are randomly arranged in blocks, and each treatment is repeated for 3 times. In the 3-5 leaf period of weeds, the stem and leaf treatment herbicide is sprayed for 1 time according to the experimental design, the liquid medicine is uniformly sprayed on the surfaces of the stems and leaves of the weeds (directional stem and leaf spraying), and the control 1(CK1) is to spray equivalent clear water; the pesticide applying apparatus is a knapsack electric sprayer and a fan-shaped spray head. Protective rows are arranged around the test field, and conventional measure management is carried out in the sugarcane field except herbicide treatment factors.

2.4 weed control Effect investigation method

And randomly selecting and fixing 6 samples for weed control effect investigation and sampling in each plot, wherein each sample is 2m multiplied by 1m, investigating the fresh weight of weeds at 14d after application, and calculating the fresh weight control effect according to a formula compared with a clear water Control (CK).

2.5 results and analysis

TABLE 2 field control of weeds in sugarcane fields with isoxaflutole and diuron combinations

As can be seen from Table 2, the combination of isoxaflutole and diuron has a good control effect on weeds in sugarcane fields, and when the dosage of the pesticide is 25-40 ga.i./mu, the control effect is more than 88%. And the field observation shows that the fertilizer is safe to sugarcane crops.

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 herbicidal composition comprising isoxaflutole and diuron characterized in that: comprises the following components in parts by weight, wherein the weight ratio of the isoxaflutole to the diuron is 0.1-10: 1-50.

2. A herbicidal composition according to claim 1, characterized in that: the weight ratio of the isoxaflutole to the diuron is 0.5-2.5: 10-40.

3. A herbicidal composition according to claim 1, characterized in that: the weight ratio of the isoxaflutole to the diuron is 1.5:10, 1.5:20, 2.5:10, 2.5:20 and 2.5: 40.

4. A herbicidal composition according to claim 1, characterized in that: the composition also comprises auxiliary materials which can be used in pesticides; the percentage content of the active ingredients is 1-80%.

5. A herbicidal composition according to claim 4, characterized in that: the formulation of the composition is missible oil, suspending agent, wettable powder, water dispersible granule, granule and dispersible oil suspending agent.

6. Use of the herbicidal composition according to any one of claims 1 to 5 for controlling weeds in sugarcane fields.