CN103098803B - Penoxsuam is with clomazone composition pesticide - Google Patents

Abstract

The invention discloses a pesticide composition of penoxsulam and clomazone, which comprises common auxiliary agents, penoxsulam and clomazone, and the mass parts of penoxsulam and clomazone The ratio is 20:1 to 1:30, preferably the ratio is 10:1 to 1:20. The combination of penoxsulam and clomazone has obvious synergistic effect, and the dosage of the active ingredients of the compound agent is significantly less than that used alone, which is suitable for controlling annual weeds in rice dry seedling fields.

Description

Penoxsulam and clomazone pesticide composition

technical field

The pesticide composition of the present invention uses penoxsulam and clomazone as active ingredients, and is used for preventing and controlling farmland weeds, especially for controlling annual weeds and the like in rice dry-raised seedling fields.

Background technique

Chemical weeding is one of the main means of controlling weeds in agriculture. In recent years, due to the large-scale single use of some herbicide varieties, many weeds have developed resistance. At the same time, when weeds occur, the grass phase is complex, not only annual and perennial weeds are mixed, herbs, vines and shrubs are mixed, but also the emergence of weeds is uneven, and the seeds, young and old weeds are staggered, so the herbicide species alone When used, all will show some defects and limitations.

Penoxsulam is a broad-spectrum herbicide for post-emergence paddy fields. It can effectively control barnyard grass, stephae and annual Cyperaceae weeds, and is effective against many broad-leaved weeds with a long-lasting effect. At the same time, it can also control bensulfuron-methyl-resistant weeds in rice fields, and has residual activity against many broad-leaved and Cyperaceae weeds and barnyard grass. However, penoxsulam is a strong inhibitor of acetolactate synthase, and the drug is slow to appear, and it takes a certain period of time for the weeds to gradually die.

The control objects of cloma pine are barnyardgrass, foxtail, crabgrass, golden foxtail, goosegrass, black nightshade, fenugreek, water spiny needles, purslane, velvetleaf, wild watermelon seedlings, quinoa, small quinoa, and bluegrass Annual grass and broad-leaved weeds such as Chinese cabbage, willow-leaved Polygonum, sorrel leaf, commelina, torch, wolfberry, ghost needle grass, cocklebur, ragweed and so on. It has a strong inhibitory effect on perennial spinach, big thistle, lettuce, and thorn.

When penoxsulam and clomazone are used alone, there are certain defects and limitations.

The present inventor has carried out in-depth research on the mixing of penoxsulam and clomazone, and on the basis of a large number of indoor formula screening tests and field efficacy tests, it has been found that penoxsulam and clomazone Mixing shows obvious synergistic effect on paddy field weeds within a certain range of mixing ratio. After further research, the present invention has been completed.

The mixing and application of penoxsulam and clomazone have not been reported yet.

Contents of the invention

The purpose of the present invention is to solve the problem of drug resistance to farmland weeds in the prior art and the actual control effect is poor, to provide a kind of high-efficiency, low toxicity, good quick-acting and long-lasting effect, which is beneficial to the comprehensive management of farmland weeds Pesticide composition.

Another object of the present invention is to provide the pesticide composition for controlling farmland weeds, especially for controlling annual weeds in dry rice seedling fields and the like.

The technical solution of the present invention: a pesticide composition, with penoxsulam and clomazone as active ingredients, and the mass-number ratio of penoxsulam and clomazone is 20:1-1:30 , the preferred ratio is 10:1 to 1:20, and the rest are auxiliary components that are allowed and acceptable in pesticides.

The herbicidal composition of the present invention is prepared into any dosage form suitable for agricultural use by known methods, and the preferred dosage form is wettable powder, microemulsion, water emulsion, suspending agent, oil suspension or water dispersible granule dosage form. The total content of active ingredients in the preparation is 1.0% to 80%.

The adjuvants used in the composition of the present invention include solvents, dispersants, stabilizers, emulsifiers, antifreeze agents, thickeners, etc. and other known substances that are beneficial to the stability and efficacy of active ingredients in the formulation, all of which are pesticides. There are no special restrictions on the various ingredients that are commonly used or allowed to be used in the preparation, and the specific ingredients and dosage are determined through simple tests according to the formulation requirements.

The products described in the present invention can be provided in the form of finished preparations, that is, the substances in the composition have been mixed, and the components of the composition can also be provided in the form of single doses, which are mixed directly in the tank or barrel before use, and then diluted to the required dosage. concentration. The application frequency and application amount of the composition of the present invention vary with weather conditions and crop conditions, and the purpose of control can be achieved by using appropriate dosage forms.

The composition of the invention is suitable for preventing and controlling annual weeds, especially annual weeds in rice dry seedling fields.

Compared with the prior art, the beneficial effect of the present invention is that the compounding has obvious synergistic effect, which improves the control effect; expands the control spectrum; the compounding of the two active ingredients reduces the amount of pesticides used, thereby reducing the cost and reduce environmental pollution.

detailed description

In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific examples, but the present invention is by no means limited to these examples. The following descriptions are only preferred embodiments of the present invention, and are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Example 1: Determination of the joint action type of annual weeds in paddy fields.

Test material: Chickweed [Stellariamedia (L.) Cyrillus] (seeds collected and preserved in the field). Barnyardgrass [Echinochloacrusgalli (L.) BeawSetaria] (seeds collected in the field to save).

Test equipment: controllable light incubator; POTTER precision laboratory spray tower; electronic balance (sensitivity 0.1mg); micropipette gun, etc.

Test method: First weigh a certain quality of 96% penoxsulam technical and 95% clomazone technical, add acetone to fully dissolve, then dilute with 0.1% Tween 80 aqueous solution, and prepare single-dose mother solutions respectively. Set a series of proportions for the purpose of mixing, and set 5 to 7 concentration gradients for each proportion. Select representative sensitive weed seeds according to the single-dose herbicidal spectrum for future use. After the treatment of the selected number is treated with soil, it is placed in a light incubator and incubated at room temperature for 10 days, and the control effect (fresh weight) is calculated, and then the least square method is used to calculate the inhibitory concentration EC ₅₀ (95% confidence limit), and then Sun Yunpei The co-toxicity coefficient (CTC) was calculated by the method.

Co-toxicity coefficient (CTC) ≥ 120 represents synergistic effect; co-toxicity coefficient (CTC) ≤ 80 represents antagonism; 80 < co-toxicity coefficient (CTC) < 120 represents additive effect.

Actual toxicity index (ATI) = (standard drug EC ₅₀ /test drug EC ₅₀ )×100.

Theoretical toxicity index (TTI) = (toxicity index of A × percentage of A in the mixture) + (toxicity index of B × percentage of B in the mixture).

Co-toxicity coefficient (CTC) = [measured toxicity index (ATI) of the mixture/theoretical toxicity index (TTI) of the mixture] × 100.

The test results show that the ratio of penoxsulam and clomazone has obvious synergistic effect between 20:1 and 1:30, especially between 10:1 and 1:20, the synergistic effect is even stronger. Obviously, the co-toxicity coefficient is above 140.

Table 1. Determination of the combined effect of different ratios of penoxsulam and clomazone on barnyardgrass.

Table 2. Determination of the combined effect of different proportions of penoxsulam and clomazone on chickweed.

Embodiment two:

Penoxsulam 3%,

Clomazone 15%,

Wetting agent pull apart powder 7%,

Dispersant NNO12%,

Talc powder 4%,

Kaolin makes up to 100%.

The above formula is coarsely pulverized in proportion, put into a mixer and mixed evenly, and then jet pulverized to obtain 18% penoxsulam·clomazone wettable powder.

This embodiment is used for preventing and eliminating the annual weeds in the dry paddy seedling field, 18% penoxsulam · clomazone wettable powder dosage 135ga.i./ha soil treatment, 10 days after the medicine, the control effect is 97.4%; 3 % Penoxsulam wettable powder dosage 200ga.i./ha soil treatment, the control effect was 64.6% 10 days after application; 15% clomazone EC dosage 180ga.i./ha soil treatment, 10 days after application 85.7%. The compounding of penoxsulam and clomazone has obvious synergistic effects, and the efficacy of 18% penoxsulam·clomazone wettable powder in controlling annual weeds in rice dry seedling fields is significantly better than 3% penoxazone Grass Ammonium WP and 15% Clomazone EC. Due to the improvement of the control effect of the medicament, the dosage of the active ingredients of the compound medicament is reduced, the cost of the medicine is reduced, the generation of disease resistance is delayed, and the environmental pollution is reduced.

Embodiment three:

Penoxsulam 5%,

Clomazone 15%,

Emulsifier 1601#15%,

Wetting agent LS8%,

Dispersant SOPA-27010%,

Bentonite 2%,

Xanthan gum 0.3%,

Silicone defoamer 0.7%,

Glycerol 9%,

Make up to 100% with deionized water.

The above formula was pre-crushed according to the proportion, then added to a sand mill for grinding, and then mixed by high shear to prepare 20% penoxsulam·clomazone suspension concentrate.

This embodiment is used to prevent and eliminate annual weeds in rice dry seedling field, 20% penoxsulam · clomazone suspending agent dosage 100ga.i./ha soil treatment, 10 days after the medicine, the control effect is 97.2%; 5% The dosage of penoxsulam suspending agent is 200ga.i./ha for soil treatment, and the control effect is 65.9% after 10 days; the dosage of 15% clomazone EC is 150ga.i./ha for soil treatment, and the control effect is 10 days after application was 88.7%. The compounding of penoxsulam and clomazone acid has obvious synergies, and the efficacy of 20% penoxsulam·clomazone suspoemulsion in controlling annual weeds in rice dry seedling fields is significantly better than that of 5% penoxsulam Grass Ammonium Suspension Concentrate and 15% Clomazone EC. Due to the improvement of the control effect of the medicament, the dosage of the active ingredients of the compound medicament is reduced, the herbicidal spectrum is expanded, the cost of the drug is reduced, the emergence of disease resistance is delayed, and the environmental pollution is reduced.

Embodiment four:

Penoxsulam 5%,

Clomazone 15%,

Sodium Lauryl Sulfate 10%,

Polycarboxylate 5%,

Sodium chloride 6%,

Polyethylene glycol 4%,

Kaolin makes up to 100%.

Dry pulverize, granulate, dry, and sieve the above formula in proportion to prepare 20% penoxsulam·clomazone water-dispersible granules.

This embodiment is used to prevent and eliminate annual weeds in rice dry seedling field, 20% penoxsulam · clomazone WDG dosage 100ga.i./ha soil treatment, 10 days after the drug control effect is 93.6%; 5% five The dosage of florasulam wettable powder is 200ga.i./ha for soil treatment, and the control effect is 68.3% after 10 days; the dosage of 15% clomazone EC is 150ga.i./ha for soil treatment, and the control effect is 10 days after application It was 86.3%. After compounding penoxsulam and clomazone, the synergistic effect is obvious, and the efficacy of 20% penoxsulam·clomazone water-dispersible granules in controlling annual weeds in rice dry seedling fields is significantly better than that of 5% five Flusulam wettable powder and 15% clomazone EC. Due to the improvement of the control effect of the medicament, the dosage of the active ingredients of the compound medicament is reduced, the herbicidal spectrum is expanded, the cost of the drug is reduced, the emergence of disease resistance is delayed, and the environmental pollution is reduced.

Embodiment five:

Penoxsulam 3%,

Clomazone 12%,

N-Methylpyrrolidone 12%,

Sodium dodecylbenzenesulfonate 8%,

4% of polyvinyl alcohol,

Emulsifier 500#7%,

Silicone defoamer 0.9%,

Make up to 100% with deionized water.

Dissolve the original drug, solvent, and emulsifier in the above formula into a uniform oil phase; mix the water-soluble components in the above formula with deionized water to obtain a water phase; under high-speed stirring, mix the oil phase and water phase to obtain a 15% Penoxsulam·clomazone aqueous emulsion.

This embodiment is used to prevent and eliminate annual weeds in rice dry seedling field, 15% penoxsulam · clomazone water emulsion dosage 100ga.i./ha soil treatment, 10 days after the medicine, the control effect is 97.2%; 3% The dosage of penoxsulam wettable powder was 200ga.i./ha for soil treatment, and the control effect was 57.8% 10 days after application; the dosage of 15% clomazone EC was 150ga.i./ha for soil treatment, and 84.3 %. The compounding of penoxsulam and clomazone has obvious synergistic effects, and the efficacy of 15% penoxsulam·clomazone water emulsion in controlling annual weeds in dry rice seedling fields is significantly better than 3% penoxsulam Amine wettable powder and 15% clomazone EC. Due to the improvement of the control effect of the medicament, the dosage of the active ingredients of the compound medicament is reduced, the herbicidal spectrum is expanded, the cost of the drug is reduced, the emergence of disease resistance is delayed, and the environmental pollution is reduced.

Embodiment six:

Penoxsulam 5%,

Clomazone 10%,

Vegetable oil emulsifier 30%,

Organic bentonite 3%,

Methylated vegetable oils make up to 100%.

Dissolve the original drug, solvent and emulsifier in the above formula into a uniform oil phase; mix under high-speed stirring to prepare 15% penoxsulam·clomazone oil suspension concentrate.

This embodiment is used for preventing and eliminating the annual weeds in the paddy rice dry seedling field, 15% penoxsulam · clomazone oil suspending agent dosage 100ga.i./ha soil treatment, 10 days after the medicine control effect is 93.4%; 5 % Penoxsulam wettable powder dosage 200ga.i./ha soil treatment, the control effect is 70.1% 10 days after application; 10% clomazone EC application dosage 150ga.i./ha soil treatment, 10 days after application The control effect is 85.2%. The compounding of penoxsulam and clomazone has obvious synergistic effects, and the efficacy of 15% penoxsulam·clomazone oil suspension concentrate in controlling annual weeds in dry rice seedling fields is significantly better than that of 5% penoxazone Grass Ammonium WP and 10% Clomazone EC. Due to the improvement of the control effect of the medicament, the dosage of the active ingredients of the compound medicament is reduced, the herbicidal spectrum is expanded, the cost of the drug is reduced, the emergence of disease resistance is delayed, and the environmental pollution is reduced.

Claims (1)

1. penoxsuam and a clomazone composition pesticide, is characterized in that: weight fraction percentage: penoxsuam5% ， clomazone 10%, vegetable oil emulsifier 30%, organobentonite 3%, methylated vegetable oil complements to 100%; By above-mentioned five fluorineSulphur grass amine, clomazone, vegetable oil emulsifier, organobentonite, methylated vegetable oil are dissolved into even oil phase; In high-speed stirredUnder, mix and make 15% penoxsuam clomazone oil-suspending agent.