阅读说明：本技术 一种包含仲丁灵、苄嘧磺隆和丁草胺的除草组合物 (Weeding composition containing butralin, bensulfuron methyl and butachlor ) 是由 林海亚 于 2020-11-24 设计创作，主要内容包括：本发明提供一种包含仲丁灵、苄嘧磺隆和丁草胺的除草组合物,包含如下重量份的组分,仲丁灵、苄嘧磺隆和丁草胺的重量配比为1-60:1-20:1-60。所述的除草组合物用于防治水稻田杂草。(The invention provides a weeding composition containing butralin, bensulfuron methyl and butachlor, which comprises the following components in parts by weight, wherein the weight ratio of the butralin to the bensulfuron methyl to the butachlor is 1-60:1-20: 1-60. The weeding composition is used for preventing and controlling weeds in paddy fields.)

1. A herbicidal composition comprising butralin, bensulfuron-methyl and butachlor, characterized in that: comprises the following components in parts by weight, wherein the weight ratio of butralin to bensulfuron methyl to butachlor is 1-60:1-20: 1-60.

2. A herbicidal composition according to claim 1, characterized in that: the weight ratio of butralin, bensulfuron methyl and butachlor is 10-50:0.1-1.5: 5-25.

3. A herbicidal composition according to claim 2, characterized in that: the weight ratio of butralin to bensulfuron methyl to butachlor is 10:1.5:5, 25:1.0:15 and 50:1.5: 15.

4. A herbicidal composition according to claim 1 or 2 or 3, characterized in that: also contains auxiliary materials which can be used in pesticides; the percentage content of the active ingredients is 5-85%.

5. A herbicidal composition according to claim 4, characterized in that: the percentage content of the active ingredients is 15-65%.

6. 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 and granule.

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

Technical Field

The invention belongs to the field of pesticides, and particularly relates to a weeding composition containing butralin, bensulfuron methyl and butachlor

Background

Butralin is a dinitroaniline selective preemergence herbicide, is suitable for the pre-emergence soil spray treatment of crops, can prevent and kill annual gramineous weeds and broadleaf weeds with better control effect, and mainly prevents and kills the annual gramineous weeds and small-grain broadleaf weeds such as barnyard grass, crab grass, green bristlegrass, goosegrass, purslane, amaranthus retroflexus, goosegrass and the like. Under the normal use technical condition, the fertilizer is safe to crops.

Bensulfuron methyl is an systemic conduction selective herbicide of the acyl urea class. Can prevent and kill off annual broad leaf weeds such as common burreed rhizome, common bluetongue herb, oriental waterplantain rhizome, short arrowhead, Japanese ardisia herb, felt, Japanese eupatorium herb, common leafflower herb, special sedge, donkey grass, allium fistulosum bunge, pipewort flower, water cabbage and the like, and sedge weeds.

Butachlor is an amide selective preemergence herbicide. The in vivo protein synthesis is inhibited mainly by the absorption of weed sprouts and young secondary roots, so that the weed sprouts are swollen and deformed, are dark green in color and finally die. Only a small amount of butachlor can be absorbed by rice seedlings and can be catabolized in vivo, so that the rice seedlings have larger drug resistance. Has effect of preventing and treating annual gramineous weeds and part of broadleaf weeds in rice transplanting fields and direct seeding fields.

The inventor finds that the combination of butralin, bensulfuron methyl and butachlor has very obvious synergistic effect, the control effect on crop weeds is obviously improved, and the weed control spectrum can be expanded.

Disclosure of Invention

The invention particularly relates to a weeding composition containing butralin, bensulfuron methyl and butachlor. The specific technical scheme is as follows:

a weeding composition containing butralin, bensulfuron methyl and butachlor comprises the following components in parts by weight, wherein the weight ratio of the butralin to the bensulfuron methyl to the butachlor is 1-60:1-20: 1-60. The preferable weight ratio of butralin, bensulfuron methyl and butachlor is 10-50:0.1-1.5: 5-25. More preferably, the weight ratio of butralin to bensulfuron methyl to butachlor is 10:1.5:5, 25:1.0:15 and 50:1.5: 15.

The weeding composition further comprises auxiliary materials which can be used on pesticides; the percentage content of the active ingredients is 5-85%. The preferred percentage of active ingredient is 15-65%.

The dosage form of the weeding composition is missible oil, a suspending agent, wettable powder, water dispersible granules and granules. The preferable dosage forms of the composition are suspending agent, wettable powder and water dispersible granule.

The wettable powder comprises the following components in percentage by weight: 5-85% of active ingredients, 1-10% of dispersing agents, 1-10% of wetting agents and the balance of filling materials.

When the water dispersible granule is prepared, the water dispersible granule comprises the following components: 5-85% of active ingredient, 1-12% of dispersing agent, 1-10% of wetting agent, 1-10% of disintegrating agent, 1-5% of binder and the balance of filler.

The suspending agent comprises the following components in percentage by weight: 5-85% of active ingredients, 1-10% of dispersing agents, 2-10% of wetting agents, 0.1-1% of defoaming agents, 0.1-2% of thickening agents, 0.5-8% of emulsifying agents and deionized water.

The weeding composition is used for preventing and controlling weeds in paddy fields. In particular to the prevention and treatment of barnyard grass, abnormal sedge, monochoria vaginalis, herba jielensis and rhizoma alismatis.

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

1) the herbicide controlling spectrum is expanded, and the preventing and removing effect is improved; 2) the period of application is prolonged, the phytotoxicity is reduced, the residual activity is reduced, and the occurrence and development of the drug resistance of the herbicide are delayed; 3) the weeding composition has obvious synergistic effect, excellent field control effect and safety to 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 indoor biological testing of a Compound composition on profiled Cyperus rotundus

The tested weeds: special-shaped sedge, field collection and laboratory preservation.

Reagent to be tested: butralin technical, bensulfuron methyl technical and butachlor technical; and (4) market purchase.

The test method comprises the following steps: greenhouse pot experiments were used. The soil for test is special soil for test collected from land without medicine, flower pot with aperture of 11cm and depth of 8cm is taken, and 3/4 of the flower pot is filled with soil. Adopting a pot bottom infiltrating irrigation mode to completely wet soil, respectively sowing the weed seeds to be tested into the flowerpots, covering with mixed sand fine soil with the thickness of about 0.5-1cm, sowing for 24h, and then applying the pesticide. The pesticide application device is an ASS-3 type herbicide indoor spraying system, a DG8003 spray head, the spraying pressure of 2.75MPA and the liquid spraying amount of 450L/hm 2. After the application, the plants are placed in a greenhouse for continuous culture and observation, the culture temperature is 25-30 ℃, the relative humidity (65 +/-15)%, natural illumination is carried out, water is supplemented in a mode of infiltrating irrigation from the bottom of the pot in daily life, and the soil humidity is kept.

The investigation and analysis method comprises the following steps: the fresh weight of the overground part of the weed is measured 45d after the application of the herbicide, and the fresh weight inhibition ratio (%) of each treated weed is calculated. Calculating the formula:in the formula: r is growth inhibition rate, X0 is control fresh weight, and X1 is treatment fresh weight.

Evaluation of the combination of the effects: 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%.

Results and analysis:

TABLE 1 Combined action of the Compound compositions on the heterotypic Cyperus rotundus

As can be seen from Table 1, the combination of butralin, bensulfuron methyl and butachlor has different combined effects on the special-shaped sedge; when the ratio of butralin, bensulfuron methyl and butachlor is 10+0.5+25, 25+1.5+25 and 50+0.5+15, the additive effect is shown, and the E-E0 values are all less than 10 percent; when the ratio of butralin, bensulfuron methyl and butachlor is 10+1.5+5, 25+1.0+15 and 50+1.5+15, the synergistic effect is obvious; the E-E0 values are all greater than 10%.

Example 2 field control of the Compound composition against weeds in Rice transplanting fields

Weeds in a test field: barnyard grass, cyperus rotundus, monochoria vaginalis, herba jiesensis, and rhizoma alismatis;

test agents:

test agent 1: 33% sec-benzyl butyl wettable powder

20% of butralin, 3% of bensulfuron methyl, 10% of butachlor, 3% of sodium dodecyl sulfate, 7% of calcium lignosulfonate, 5% of nekal BX, 3% of white carbon black and 100% of kaolin.

Test agent 2: 41% sec-benzyl butyl wettable powder

25% of butralin, 1% of bensulfuron methyl, 15% of butachlor, 5% of sodium dodecyl sulfate, 8% of calcium lignosulfonate, 4% of nekal BX, 4% of white carbon black and 100% of kaolin.

Test agent 3: 66.5 percent sec-benzyl butyl water dispersible granule

50% of butralin, 1.5% of bensulfuron methyl, 15% of butachlor, 6% of sodium dodecyl sulfate, 4% of calcium lignosulfonate, 2% of nekal BX, 4% of xanthan gum, 3% of urea and the balance of attapulgite to 100%.

Comparative agent 1: butralin 20%, butachlor 10%, sodium dodecyl sulfate 3%, calcium lignosulfonate 7%, nekal BX 5%, white carbon black 3% and kaolin for 100%.

Comparative agent 2: 3% of bensulfuron methyl, 3% of sodium dodecyl sulfate, 7% of calcium lignosulfonate, 5% of nekal BX, 3% of white carbon black and 100% of kaolin.

And (3) experimental design: setting a treatment group and a blank control; each treatment was repeated 4 times. The application is only carried out 1 time during the test period, and the application method is a toxic soil method. Spraying 15kg of toxic soil per mu, keeping the water depth of the field to be 3-5cm and the water layer to be 8-10d when the toxic soil is applied, and allowing the toxic soil to naturally dry after the toxic soil is only irrigated. After investigation of the fresh weight control effect of the weeds at 60d, 4 representative points are taken in each plot, and each point is 0.25m 2. I.e. 1m2 for each region.

Table 2 field control of the Compound composition against weeds in Rice transplanting fields

As can be seen from Table 2, the herbicidal composition of the present invention has a good control effect on the weeds barnyard grass, sedge and monochoria vaginalis in the rice transplanting field; the control effect is about 90 percent. And field observation shows that the rice is safe to rice 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.