Pesticide composition for preventing and treating traditional Chinese medicine semen cuscutae

Abstract

The invention belongs to the technical field of agricultural weed control, and relates to a pesticide composition for controlling traditional Chinese medicine semen cuscutae, the composition contains clomazone and triclopyr, and the mass ratio of the triclopyr to the clomazone is 3: (20-40). When the composition is used for preventing and treating semen cuscutae in the traditional Chinese medicine cynanchum paniculatum, the use dosage of clomazone is 72-144g a.i. / hm < 2 >, and the use dosage of triclopyr is 10.8 g a.i. / hm < 2 >. The screened medicament composition has good safety to the Chinese herbal medicine cynanchum paniculatum, and has an excellent effect of preventing and removing semen cuscutae.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural weed control and prevention, and relates to a pesticide composition for controlling dodder seeds. Background Art

[0002] The disclosure of this background information is intended to enhance understanding of the general background of the invention and should not necessarily be taken as an acknowledgment or any form of suggestion that this information constitutes the prior art already known to a person skilled in the art.

[0003] Cuscuta is a plant of the genus Cuscuta in the family Convolvulaceae. Cuscuta sp. ) is a common name for plants that are a type of malignant parasitic weeds that cause serious damage. Cuscuta absorbs nutrients from the host through a special organ called a "haustorium". Cuscuta cannot survive without the host plant. Therefore, after a long period of evolution and rapid spread, Cuscuta can now parasitize more than a thousand plants. Cuscuta is widely distributed in Heilongjiang, Gansu, Shandong, Jiangsu, Hunan, Hubei, Jiangxi, Guangdong and other provinces in my country, posing a serious threat to the growth of many crops and Chinese herbal medicines.

[0004] On the other hand, as a traditional Chinese medicine, Cuscuta has rich medicinal value and its medicinal history can be traced back to ancient times. It was first recorded in "Shennong's Herbal Classic". In the history of its use, Cuscuta also has other names such as Cuscuta, Cuscuta, Cuscuta, and Cuscuta. my country has a long record of planting and using Cuscuta as medicine. In recent years, with the development of my country's traditional Chinese medicine industry, the artificial planting area of ​​Cuscuta and other Chinese herbal medicines has gradually increased, which has gradually caused the damage of Cuscuta in farmland to become more serious year by year. In Chinese herbal medicine planting bases such as Gansu, Shandong and Shaanxi, Cuscuta seriously endangers the planting safety of other Chinese herbal medicines.

[0005] Chemical herbicides have made important contributions to preventing and controlling weeds in farmland, increasing crop yields, and ensuring food security. However, dodder is very resilient and can easily form a close parasitic relationship with its host. The incorrect application of chemical herbicides can easily cause phytotoxicity to the host plant. Currently, there is a lack of chemical agents that can effectively and safely control dodder. Summary of the invention

[0006] In view of the problem of lack of dodder control agents, the present invention provides a pesticide composition for controlling dodder, which can effectively control dodder and has high safety to traditional Chinese medicine.

[0007] To achieve the above purpose, the present invention adopts the following technical solution.

[0008] A pesticide composition for preventing and controlling dodder comprises clomazone and triclopyrazone.

[0009] The mass ratio of clomazone to triclopyrazone is (20-40):3.

[0010] The application crop of the pesticide composition is Cynanchum paniculate.

[0011] The above composition may also contain other inert ingredients for stabilizing the active ingredients and facilitating their application to crops or attachment to targets, such as fillers, wetting agents, dispersants, defoamers, antifreeze agents, solvents, emulsifiers, preservatives, disintegrants, etc.

[0012] The above composition can be processed by the common methods in the prior art, and the preferred dosage forms include suspensions, oil suspensions, microcapsule suspensions, wettable powders, water-dispersible granules, emulsifiable concentrates, and microemulsions.

[0013] A method for preventing and controlling dodder in a Chinese medicinal field comprises the following steps: Mix clomazone and triclopyr and spray the stems and leaves of Cuscuta australis; The mass ratio of clomazone to triclopyraclostrobin is (20-40):3; The Chinese medicinal field crop is Cynanchum wilfordii.

[0014] The dosage of clomazone is 72 g / hm 2 -144g / hm 2 The dosage of triclopyr is 10.8 g / hm 2 .

[0015] The endpoints and any values ​​of the ranges disclosed in this application are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in this application.

[0016] The present invention has the following advantages: At present, the market lacks highly effective dodder control agents. The combination of agents provided by the present invention can effectively control dodder while ensuring the safety of Chinese herbal medicines, thereby effectively reducing the harm of dodder in Chinese herbal medicine fields. At the same time, the combination of the two agents produces significant synergy and safety assurance, showing that the combination of agents has great potential to be developed into a commercial pesticide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The picture of the harm of Cuscuta australis to Chinese herbal medicine Xu Changqing; Figure 2 This is a picture of the control of Cuscuta australis in the field of Cynanchum wilfordii using clomazone and triclopyr. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with examples, but the present invention is not limited by the following examples.

[0019] Example 1 Screening of highly effective dodder control agents 1. Single-dose screening Test plots: Select the Xu Changqing Chinese medicinal field where the previous crop of Cuscuta australis was planted.

[0020] There were 21 herbicides in total, including quizalofop-p-ethyl, fluazifop-butyl, sethoxydim, pendimethalin, 2,4-D isooctyl, promethazine, triclopyracloacetic acid, fomesafen, fluazifop-butyl, butachlor, metolachlor, imazapic, trifluorfen, butalin, s-isopropylamine, trifluralin, dicamba, imazapic, isothiocarb, metolachlor, and quinclorac; all the herbicides were commercially purchased preparations.

[0021] Dosage and method of use: The lowest recommended field dose as indicated on the pesticide formulation label; Use ASS-4 automatic control spraying system, fan-shaped nozzle, spray pressure 0.4MPa, nozzle flow 800mL / min, adjust the operating speed according to the actual spraying area, and spray evenly.

[0022] Results survey: On the 15th day after the application of the drug, three points were randomly surveyed in each plot, and the conditions of 20 dodder stem tips were randomly surveyed in the selected area, the survival rate was recorded, and the control effect was calculated. The calculation formula is as follows: Control effect (%) = (surviving dodder shoot tips in the control area - surviving dodder shoot tips in the treatment area) / surviving dodder shoot tips in the control area × 100.

[0023] Randomly investigate the growth status of 100 crops and record the damage to Cynanchum cyrtonema according to the following standards: No impact on growth is recorded as "Level I"; impact on growth but no death of plants is recorded as "Level II"; severe impact on growth and death of more than 50% of plants is recorded as "Level III"; and all plant death is recorded as "Level IV".

[0024] Table 1 The control effect of different pesticides on Cuscuta australis and their safety on Cynanchum chinense Note: “-” is invalid and “ / ” is not counted.

[0025] As can be seen from Table 1, the 22 selected herbicides had quite different effects on dodder control, but 100% effective acetochlor, triclopyr, metribuzin, 2,4-D isooctyl and butralin all had devastating effects on the host Chinese herbal medicine (Cynanchum indica). In subsequent experiments, reducing the herbicide concentration (diluting 5 times) still failed to effectively reduce the occurrence of phytotoxicity.

[0026] The comprehensive factors of safety, efficacy, comprehensive prevention and mechanism of action were used to select clomazone for further research. Cuscuta germination speed is fast, and the combination with hormone agents that effectively inhibit apical growth may have a better effect. The apical inhibition effect test of this type of agent showed that triclopyr still had a good apical inhibition effect on Cuscuta at 0.1 times the field concentration. Therefore, clomazone and triclopyr were selected as the next research objects.

[0027] 2. Screening of effective control agents for Chinese herbal medicine Cuscuta The same operation method as in step 1 was used to compound 480 g / L of commercially available triclopyr emulsifiable concentrate and 480 g / L of isoflurane emulsifiable concentrate for formulation screening.

[0028] Table 2 The control effect of different doses of clomazone and triclopyrazone on Cuscuta australis and their safety on Cynanchum chinense As can be seen from Table 2, the combination of clomazone and triclopyr has a good effect on the Chinese herbal medicine field dodder, and the combination effect is a significant synergistic effect. On the basis of ensuring safety, clomazone 72-144 g.i. / hm is recommended. 2 and triclopyrazone 10.8 g ai / hm 2 The compound is triclopyrazone:isothiazolin is 3:(20-40).

[0029] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A pesticide composition for controlling dodder, characterized in that: These include clomazone and triclopyr.

2. The pesticide composition according to claim 1, characterized in that The mass ratio of clomazone to triclopyrazone is (20-40):

3.

3. The pesticide composition according to claim 1, characterized in that The application crop of the pesticide composition is Cynanchum paniculate.

4. The pesticide composition according to claim 1, characterized in that The invention also contains other inert ingredients, which are selected from at least one of fillers, wetting agents, dispersants, defoamers, antifreeze agents, solvents, emulsifiers, preservatives and disintegrants.

5. The pesticide composition according to claim 1, characterized in that The dosage form is selected from suspension, oil suspension, microcapsule suspension, wettable powder, water dispersible granules, emulsifiable concentrate or microemulsion.

6. A method for controlling dodder in a Chinese medicinal field, characterized in that: The following steps are involved: Mix clomazone and triclopyr and spray the stems and leaves of Cuscuta australis; The mass ratio of clomazone to triclopyraclostrobin is (20-40):3; The Chinese medicinal field crop is Cynanchum wilfordii.

7. The method according to claim 6, characterized in that The dosage of clomazone is 72 g / hm 2 -144g / hm 2 The dosage of triclopyr is 10.8 g / hm 2 .

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