阅读说明：本技术 一种烯酰吗啉和福美双杀菌剂及其制备方法和用途 (Dimethomorph and thiram bactericide, and preparation method and application thereof ) 是由 罗会 刘琴 韦昆 王晓宇 李兴忠 于 2019-12-02 设计创作，主要内容包括：本发明涉及一种烯酰吗啉和福美双杀菌剂及其制备方法和用途。所述杀菌剂超低容量喷雾油剂包括：烯酰吗啉、福美双、溶剂、油性溶剂、填料、表面活性剂。本发明喷雾油剂具有加工简便、功效高,安全环保、无药害,对真菌性病害均具有很好的防治效果。在植保无人机飞防作业中,其配方对防控荔枝霜疫霉病效果7天高达92.6％。(The invention relates to a dimethomorph and thiram bactericide, a preparation method and application thereof. The bactericide ultra-low volume spray oil agent comprises: dimethomorph, thiram, a solvent, an oily solvent, a filler and a surfactant. The spray oil agent has the advantages of simple and convenient processing, high efficiency, safety, environmental protection, no phytotoxicity and good control effect on fungal diseases. In the flying prevention operation of the plant protection unmanned aerial vehicle, the formula has the effect of preventing and controlling the downy mildew of litchi for 7 days, and the effect is as high as 92.6 percent.)

1. A pesticide compound spray oil agent is characterized in that: the dimethomorph and the thiram are used as active ingredients, wherein the weight percentages of the components are as follows: 0.1-1% of dimethomorph, 0.1-1% of thiram, 8-15% of organic solvent, 2-8% of anionic surfactant, 2-8% of nonionic surfactant, 50-60% of oily solvent and 20-30% of filler.

2. The pesticide compound spray oil agent of claim 1, which is characterized in that: the weight ratio of the active ingredients of the dimethomorph and the thiram is 1: 1-1: 20.

3. The pesticide compound spray oil agent of claim 1, which is characterized in that: the organic solvent is a mixture of dimethyl sulfoxide and cyclohexanone in a weight ratio of 1: 1-1: 10.

4. The pesticide compound spray oil agent of claim 1, which is characterized in that: the anionic surfactant is a sulfonate anionic auxiliary agent, and the nonionic surfactant is polyether and block polyether auxiliary agent; the oily solvent is methyl oleate; the filler is chlorinated paraffin.

5. The pesticide compound spray oil agent of claim 1, which is characterized by comprising the following components in percentage by weight:

or

Or

6. The preparation method of the pesticide compound spray oil agent of any one of claims 1 to 5 is characterized by comprising the following steps: weighing the raw pesticide according to the formula amount at normal temperature and normal pressure, adding the solvent according to the formula amount into the raw pesticide so as to completely dissolve the raw pesticide, then adding the surfactant according to the formula amount into the raw pesticide, uniformly stirring the mixture, sequentially adding the oily solvent and the filler into the mixture, and stirring the mixture for 10 to 20 minutes to obtain the single transparent homogeneous yellowish ultralow-volume spray oil agent containing dimethomorph and thiram.

7. The application of the pesticide compound spray oil agent of any one of claims 1 to 5 in the aspect of controlling agricultural mycoses, which is characterized in that the agricultural mycoses are as follows: downy blight, phytophthora blight, saprolegniasis, seedling yellow blight, phytophthora parasitica, cereal smut, anthracnose, epidemic rot and late blight.

8. A method of controlling agricultural fungal diseases, characterized by: compounding a pesticide according to any one of claims 1 to 5 with a spray oil.

9. A method of controlling agricultural mycoses according to claim 8, characterized in that: the application method is ultra-low volume spraying, and the ultra-low volume is 1-3 wt% of the pesticide compound spray oil agent described in any one of claims 1-5.

Technical Field

The invention belongs to the field of pesticide preparations, and particularly relates to a preparation method and application of an ultralow-volume spray oil agent containing dimethomorph and thiram.

Background

The dimethomorph belongs to a morpholine broad-spectrum and low-toxicity bactericide, has systemic property, has strong inhibition effect on the growth of phytophthora capsici hyphae, the generation of sporangia and the release of zoospores, has a biochemical action target which does not act on the synthetic pathways of DNA, RNA, protein and lipid and the respiration process, does not affect the glycometabolism of cells and the generation of cell wall polymers, but affects the rearrangement of cell wall molecular structures and the assembly of pathogenic cell wall polymers, thereby interfering the formation of cell walls, destroying the formation of fungal cells and finally leading the fungal cells to die. The dimethomorph has the activity of protecting, treating and resisting the generation of spores, and is mainly used for preventing and treating oomycete diseases caused by peronospora, late blight, phytophthora and the like.

Thiram is a dithiocarbamate broad-spectrum bactericide (DTCs), belongs to a broad-spectrum protective bactericide, has the characteristics of high efficiency, broad spectrum and low toxicity, can be used for spraying and controlling diseases of fruit trees and vegetables, is simultaneously used for treating seeds and soil in large quantity, and has better control on various crop downy blight, late blight, phytophthora blight, rot, saprolegniasis, phytophthora parasitica, anthracnose, cereal smut and seedling yellow blight.

The dimethomorph has higher resistance risk when being used alone, and can delay the generation of resistance, improve the compound drug effect and enhance the effect on fungal diseases by being compounded with the protective bactericide thiram

The prevention and control effect of pests. The registered dimethomorph-thiram compound preparation only contains wettable powder, and an ultra-low-capacity spray preparation compounded by the dimethomorph-thiram is not available.

The ultra-low volume spray is a special preparation for ultra-low volume spray application, wherein the liquid medicine sprayed on target crops is sprayed in extremely fine droplets with extremely low dosage. Fine fog drop, high coverage rate, good permeability and high medicinal effect. And the ultra-low volume spray takes high-boiling point oily solvent as a carrier, is more resistant to rain wash and has long drug action period. The ultra-low volume sprayer is adopted for flying prevention operation, so that the targeting property of spraying can be effectively improved, the drift loss is reduced, and the utilization rate of pesticides is improved.

Disclosure of Invention

The invention develops the ultra-low volume spraying oil agent containing dimethomorph-thiram, which is suitable for being sprayed by a plant protection unmanned aerial vehicle, has excellent solubility and stability, small fog drops, large coverage area, good evaporation resistance and long lasting period, improves the control effect of dimethomorph and thiram, reduces the usage amount of pesticides, overcomes the defects of long time consumption, large usage amount, poor control effect and the like of conventional spraying, and has no obvious phytotoxicity in the flying control operation of the plant protection unmanned aerial vehicle.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

an ultra-low volume spray oil agent containing dimethomorph and thiram is an ultra-low volume spray oil agent prepared by taking dimethomorph and thiram synergistic compound as active ingredients and adding a solvent, an anionic surfactant, a nonionic surfactant, an oily solvent and a filler, and the weight percentages of the components are as follows:

0.1-1% of dimethomorph, 0.1-1% of thiram, 8-15% of solvent, 50-60% of oily solvent, 20-30% of filler, 2-8% of anionic surfactant and 2-8% of nonionic surfactant.

The weight ratio of the dimethomorph to the thiram is 1: 1-1: 20, and the preferable ratio is 1: 1-1: 2.

The solvent comprises dimethyl sulfoxide and cyclohexanone in a weight ratio of 1: 1-1: 10.

The anionic surfactant is sulfonate anionic auxiliary agent, and the nonionic surfactant is polyether and block polyether auxiliary agent.

The oily solvent is methyl oleate, and the weight percentage of the oily solvent is 50-60%.

The filler is chlorinated paraffin with the weight percentage of 20-30%.

On the other hand, the invention provides a preparation method of the dimethomorph-thiram-containing ultralow-volume spray oil agent, which is characterized by comprising the following steps of: the components and the content of the ultra-low volume spray oil agent containing the dimethomorph-thiram are prepared by weighing raw medicines with the formula amount at normal temperature and normal pressure, adding a solvent with the formula amount into the raw medicines to completely dissolve the raw medicines, adding a surfactant with the formula amount into the raw medicines, stirring the raw medicines uniformly, sequentially adding an oily solvent and a filler into the mixture, and stirring the mixture for 10 to 20 minutes to obtain a single transparent homogeneous yellowish ultra-low volume spray oil agent containing the dimethomorph-thiram.

The alkene of the inventionThe spray oil preparation with ultra-low volume of dimorpholinyl thiram is suitable for preventing and treating Peronophythora, Phytophthora, pythium and cerealSmut disease(Utiliagorgopyrum), yellow blight (Fusarium moniliforme Shell), black shank (Phytopthoraparasitica var nicotianae),AnthracnoseThe application of the compound in fungal diseases such as (collerttrichum), Phytophthora rot (Phytophthora parasitica Datt), late blight (Phytophthora) and the like.

The invention relates to application of an ultralow-volume spray oil agent containing dimethomorph and thiram in flying prevention operation of a plant protection unmanned aerial vehicle.

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

1. the invention has simple operation in the spraying process, does not need to be blended by adding water, can be directly used for ultra-low volume spraying, effectively improves the targeting property of the spraying, improves the pesticide effect of the bactericide, reduces the using amount of the pesticide, and is suitable for being applied in areas far away from water sources and drought and water shortage areas.

2. The ultra-low volume spray oil agent containing dimethomorph-thiram has relatively lower active ingredient content than the traditional preparation formulation, but the unit active ingredient concentration of the spray liquid agent is high, which is beneficial to improving the drug effect. In addition, the ultralow volume adopts low-volatility oil as a solvent, and active ingredients penetrate into the deep layer of the leaf, so that the rain wash resistance is realized, and the lasting period is prolonged, thereby reducing the use of pesticides, reducing the environmental pollution and lowering the agricultural cost.

3. And (3) synergistic interaction: the dimethomorph used alone has higher resistance risk, and is compounded with the protective bactericide thiram to delay the generation of the resistance, and the compounding has the synergistic effect, thereby improving the drug effect of the medicament and enhancing the control effect of the medicament on fungal diseases.

4. The dimethomorph-thiram ultra-low-volume spray oil agent disclosed by the invention is good in solubility, stable in dosage form, small in droplet, large in coverage area and good in evaporation resistance, and the field control effect is improved.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to specific embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. The following examples refer to "%" as "percent by weight" unless otherwise indicated.