Composition containing oxyfluorfen and picloram

Abstract

The invention provides a weeding composition containing oxyfluorfen and picloram. The mass ratio of the oxyfluorfen to the picloram is (5: 1)-(1: 20). The composition can be prepared into an agriculturally suitable preparation for controlling weeds. The weeding composition disclosed by the invention has a remarkable synergistic effect, and can effectively reduce the use dosage of active ingredients, enlarge the weed control spectrum, inhibit the spread of alien invasive weed solidago canadensis, reduce environmental pollution and protect ecological diversity.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, in particular to a composition comprising oxyfluorfen and amloprotin and application thereof. Background Art

[0002] Oxyfluorfen is a contact herbicide that kills weeds in the presence of light. It enters the plant body mainly through the coleoptile and mesocyllinium, is less absorbed by the roots, and is transported upward through the roots into the leaves. It has the best effect when applied before and after the emergence of seeds. It can control broadleaf weeds, sedges and grass weeds, has a good control effect on a variety of seed-propagating weeds, and has an inhibitory effect on perennial weeds.

[0003] Amlodipine is a synthetic hormone herbicide that is rapidly absorbed through the roots and leaves and systemically conducted in the plant. It can be conducted in both directions, toward the top and toward the base, and accumulates at the growing point. It mainly acts on nucleic acid metabolism, and causes malformation of chloroplast structure and other organelles, interferes with protein synthesis, acts on meristem activity, etc., ultimately leading to plant death.

[0004] The prior art CN106550946A discloses a pesticide composition containing amifloprid and oxyfluorfen, and its application in controlling Alternanthera philoxeroides. The active ingredients are amifloprid and oxyfluorfen, and the mass ratio of amifloprid to oxyfluorfen is 50-250:5-30. However, there is no report on formula optimization and effective control of Solidago canadensis. Summary of the invention

[0005] The object of the present invention is to provide a composition comprising oxyfluorfen and amloprotin. The specific scheme is as follows: A herbicidal composition comprising oxyfluorfen and amiloride, comprising active ingredients in the following mass ratio: the mass ratio of oxyfluorfen to amiloride is 5:1-1:20.

[0006] Preferably, the mass ratio of oxyfluorfen to amiloride is 1:1.5-1:7.

[0007] Preferably, the mass ratio of oxyfluorfen to amiloride is 1:5-1:7.

[0008] The herbicidal composition of the present invention also contains auxiliary ingredients that can be used in pesticides. The auxiliary ingredients include solvents, dispersants, wetting agents, emulsifiers, stabilizers, thickeners, binders, disintegrants, pH regulators, antifreeze agents, fillers, and other known substances that are beneficial to the stability of the active ingredients in the preparation and the efficacy of the medicine. Different auxiliary ingredients are selected according to needs to prepare corresponding dosage forms. The above auxiliary ingredients are all commonly used ingredients allowed to be used in pesticide preparations and are not particularly limited.

[0009] The herbicidal composition of the present invention can be in the form of suspension, wettable powder, water-dispersible granules, dispersible liquid, oil suspension, aqueous emulsion, microemulsion, preferably water-dispersible granules or dispersible oil suspension.

[0010] The herbicidal composition of the present invention is used for preventing and controlling weeds in non-cultivated land, forest land, orchards, etc., wherein the weeds are grass weeds and broadleaf weeds, preferably the invasive foreign weeds Solidago canadensis, Eupatorium adenophorum, Fleabane sempervivum, Digitaria sanguinalis, etc.

[0011] Beneficial technical effects When the ratio of oxyfluorfen to amiloride is 1:1.5-1:7, the compound composition exhibits a significant synergistic effect on Canada solidago; when the ratio of oxyfluorfen to amiloride is 1:5-1:7, the compound composition exhibits a significant synergistic effect on crabgrass; when the composition exhibits a synergistic effect, the dosage of the active ingredient can be significantly reduced, the weed control spectrum can be expanded, and the root killing effect on the invasive alien weed Canada solidago can be achieved.

[0012] The composite herbicidal composition of the present invention has an excellent control effect on non-cultivated weeds, especially 24% ethoxychlor·ammonia chloride water dispersible granules with an active ingredient dosage of 12-18g / mu have an excellent control effect on non-cultivated weeds such as Canada thistle, annual sedge, and crabgrass. DETAILED DESCRIPTION

[0013] Example 1 Determination of the combined effects of compound herbicides on Solidago canadensis Test weeds: Solidago canadensis, seeds were collected from the field and stored in the laboratory for future use.

[0014] Test method: Put the sieved fine soil into a plastic pot with holes, and use the bottom of the pot to make the soil completely moist. Soak the selected weed seeds for 24 hours, evenly sow them on the soil surface, sow 30 seeds per pot, and then cover them with 1 cm thick fine soil. Use the bottom of the pot to make the soil moist, and place it in a greenhouse for heat preservation. After a certain period of cultivation, remove the large and weak seedlings, and leave 20 weeds with the same leaf age and growth in the pot for treatment. Refer to the "Guidelines for Indoor Bioassay Tests of Pesticides", adopt the stem and leaf treatment method, and the spray volume is 45mL / m 2 , take the medicine once.

[0015] Survey method: Survey once every 21 days after treatment. Use the absolute value survey method, cut the surviving weeds along the soil surface with a blade, weigh the fresh weight of the weeds with an analytical balance, and calculate the fresh weight control effect. Weed fresh weight control effect = (fresh weight of weeds in the control area - fresh weight of weeds in the treatment area) / fresh weight of weeds in the control area.

[0016] Combination effect: Gowing was used to evaluate the combination effect.

[0017] E0=X+Y(100-Y) / 100; when E-E0>10%, it is a synergistic effect; when E-E0<-10%, it is an antagonistic effect; when the E-E0 value is between the theoretical value ±10%, it is an additive effect.

[0018] Test results: The combination of oxyfluorfen and amiloride showed different combined effects on Solidago canadensis. When the ratio of oxyfluorfen to amiloride was 1:1.5-1:7, the composite composition showed a significant synergistic effect on Solidago canadensis, and other ratios showed an additive effect. When the composition showed a synergistic effect, the dosage of the active ingredient could be significantly reduced to improve the control effect.

[0019] Table 1 Determination of the combined effects of compound herbicides on Solidago canadensis ; Example 2 Determination of the combined effects of compound herbicides on crabgrass Test weeds: Crabgrass, seeds were collected in the field and stored in the laboratory for future use.

[0020] Test method: Put the sieved fine soil into a plastic pot with holes, and use the bottom of the pot to make the soil completely moist. Soak the selected weed seeds for 24 hours, evenly sow them on the soil surface, sow 40 seeds in each pot, and then cover them with 1 cm thick fine soil. Use the bottom of the pot to make the soil moist, and place it in a greenhouse for heat preservation. After a certain period of cultivation, remove the large and weak seedlings, and leave 30 weeds of the same leaf age and growth in the pot for treatment. Refer to the "Guidelines for Indoor Bioassay Tests of Pesticides", adopt the stem and leaf treatment method, and the spray volume is 45mL / m 2 , take the medicine once.

[0021] Survey method: Survey once 14 days after treatment. Use the absolute value survey method, cut the surviving weeds along the soil surface with a blade, weigh the fresh weight of the weeds with an analytical balance, and calculate the fresh weight control effect. Weed fresh weight control effect = (fresh weight of weeds in the control area - fresh weight of weeds in the treatment area) / fresh weight of weeds in the control area.

[0022] Combination effect: Gowing was used to evaluate the combination effect.

[0023] E0=X+Y(100-Y) / 100; when E-E0>10%, it is a synergistic effect; when E-E0<-10%, it is an antagonistic effect; when the E-E0 value is between the theoretical value ±10%, it is an additive effect.

[0024] Test results: The combination of oxyfluorfen and amiloride showed different combined effects on crabgrass. When the ratio of oxyfluorfen to amiloride was 1:5-1:7, the composite composition showed a significant synergistic effect on crabgrass, and other ratios showed an additive effect. When the composition showed a synergistic effect, the dosage of the active ingredient could be significantly reduced, slowing down the development of weed resistance.

[0025] Table 2 Determination of the combined effects of compound herbicides on Digitaria tangutica ; Example 3 Field control effect of compound herbicides on non-cultivated weeds Weed types: Canada goldenrod, annual grass, crabgrass; Pharmacy: Agent 1: 24% oxyfluorfen·ammonia chloride water dispersible granules, the specific formula contains the following ingredients in weight percentage: 4% oxyfluorfen, 20% amiloride, 4% sodium lauryl sulfate, 4% calcium lignin sulfonate, 2% lauryl powder, 2% urea, 1% polyvinyl alcohol, 4% white carbon black, and 100% kaolin.

[0026] Agent 2: 24% oxyfluorfen·ammonia chloride water dispersible granules, the specific formula contains the following ingredients in weight percentage: 4% oxyfluorfen, 20% amiloride, Dispersogen 1494 3%, Atplus1209 3%, Rhodasurf 860 / P 3%, urea 2%, polyvinyl alcohol 1%, white carbon black 4%, and kaolin makes up 100%.

[0027] Agent 3: 24% oxyfluorfen·ammonia chloride water dispersible granules, the specific formula contains the following ingredients in weight percentage: 4% oxyfluorfen, 20% amiloride, Dispersogen 1494 5%, Atplus1209 4%, urea 2%, polyvinyl alcohol 1%, white carbon black 4%, kaolin makes up 100%.

[0028] Agent 4: 24% oxyfluorfen·ammonia chloride water dispersible granules, the specific formula contains the following ingredients in weight percentage: 4% oxyfluorfen, 20% amiloride, Atplus1209 4%, Rhodasurf 860 / P 5%, urea 2%, polyvinyl alcohol 1%, white carbon black 4%, kaolin makes up 100%.

[0029] The dosage of the drug is shown in Table 3.

[0030] Test method: cell area 30m 2, the plots were spaced 1m apart, arranged in random blocks, with a clean water control, and 4 replicates per treatment. Conventional compressed manual spray was used, and the liquid bucket was rinsed before changing the medicine. The water spraying volume per mu was 50kg; the weeds in each treatment were relatively consistent in age and size; 3 points were set in each plot, each point was 0.11m 2 30 days after application, investigate the number of weeds and weigh the fresh weight of the aboveground parts to calculate the fresh weight control effect.

[0031] Fresh weight control effect = (fresh weight of weeds in the control area - fresh weight of weeds in the treatment area) / fresh weight of weeds in the control area × 100%.

[0032] Test results: 24% ethoxy-ammonia chloride water dispersible granules have excellent control effects on non-arable weeds such as Canada thistle, annual ragweed, and crabgrass. The recommended dosage is: 12-18g / mu of active ingredient.

[0033] Table 3 Field control effect of mixed herbicides on weeds in non-arable land ; Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it.

Claims

1. A herbicidal composition comprising oxyfluorfen and amiloride, characterized in that: The active ingredients are contained in the following mass ratio: the mass ratio of oxyfluorfen to amloprotinol is 5:1-1:

20.

2. The herbicidal composition according to claim 1, characterized in that The mass ratio of oxyfluorfen to amiloride is 1:1.5-1:

7.

3. The herbicidal composition according to claim 2, characterized in that The mass ratio of oxyfluorfen to amiloride is 1:5-1:

7.

4. The herbicidal composition according to any one of claims 1 to 3, characterized in that It also contains excipient ingredients that can be used on pesticides.

5. The herbicidal composition according to claim 4, characterized in that The auxiliary material components include one or more of solvents, dispersants, wetting agents, emulsifiers, stabilizers, thickeners, binders, disintegrants, pH regulators, antifreeze agents, and fillers.

6. The herbicidal composition according to claim 5, characterized in that The herbicidal composition can be in the form of a suspension, wettable powder, water-dispersible granules, dispersible liquid, oil suspension, aqueous emulsion, or microemulsion.

7. Use of the herbicidal composition according to any one of claims 1 to 6 for controlling weeds in non-cultivated land, woodland, orchards, etc., characterized in that: The weeds are annual or perennial grass and broad-leaved weeds.