CN109744252B - Synergistic composition for preventing and treating citrus mites - Google Patents
Synergistic composition for preventing and treating citrus mites Download PDFInfo
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Abstract
The invention belongs to the technical field of pesticide application, and particularly relates to a synergistic composition for preventing and treating citrus mites. The synergistic composition for preventing and treating the citrus mites is prepared by compounding effective components of nitrofos and clofentezine, wherein the mass ratio of the nitrofos to the clofentezine is 1-20:1-15, and the synergistic composition can be prepared into conventional dosage forms in agricultural pharmacy such as wettable powder, water dispersible granules, suspending agents, granules, aqueous agents or emulsion in water. Compared with a single agent, the synergistic composition provided by the invention has an obviously improved control effect on citrus mites. The pesticide composition has obvious synergistic effect, can reduce the pesticide consumption, reduce the prevention and control cost, delay the generation of pest resistance and reduce the pollution to the environment.
Description
Technical Field
The invention belongs to the technical field of pesticide application, and particularly relates to a synergistic composition for preventing and treating citrus mites.
Background
The mites are also called dragon, red spider, yellow spider, etc., and belong to the order of Arachnida. The pest mites are various in species, and serious in garden plants, the pest mites comprise tetranychus viennensis, tetranychus urticae, tetranychus cinnabarinus, panonychus citri, tea mites, psyllid and the like, and belong to tetranychidae and gall mite families. Mainly harms various garden plants such as apples, oranges, cotton, pear trees, tea trees and the like. The pest mites pierce and suck plant branches and leaves, which are main pests damaging leaves, often cause damage to leaves of garden plants, influence photosynthesis, and spread plant virus diseases and fungal diseases.
The problem of pesticide resistance of agricultural pests is a global problem and is always a key topic concerned by agricultural science and technology workers. With the continuous year-to-year chemical prevention and control of pests, the increase of the usage amount of pesticides, the influence of unscientific use of pesticides and other factors, the resistance of pests is increasingly serious, and the types of pests with resistance are continuously increased. Meanwhile, due to the high-strength use of pesticides, a series of problems of overproof pesticide residues of agricultural products, environmental pollution, increase of pesticide cost of farmers and the like are caused, and the sustainable development of agriculture is not facilitated.
Nitrophos, belonging to organophosphorus insecticides, has an action mechanism of acetylcholinesterase inhibitor. Has good control effect on pests such as citrus mites, arrowhead scales, cotton bollworms, vegetable oriental tobacco budworms, diamond back moths, rice planthoppers and the like.
Clofentezine is an organic chlorine acaricide, mainly has contact poisoning effect, has lasting drug effect, is effective on mites on fruit trees, cotton and ornamental plants, and is ineffective on predatory mites and natural enemies.
Compounding the effective components of the pesticide with different action mechanisms is an effective and rapid way for developing new products of the pesticide and preventing and treating resistant plant diseases and insect pests at present. After different pesticide active ingredients are compounded, three action types can be shown: additive action, synergistic action and antagonistic action. Generally, the action types of different pesticide active ingredients after being compounded can be known only through a large number of tests. Screening the compound pesticide with synergistic effect can obviously improve the control effect, reduce the pesticide use amount, reduce the control cost, delay the generation of pest resistance and reduce the pollution to the environment, and is one of the important means of the current comprehensive control of plant diseases and insect pests.
The inventor screens out the insecticidal composition of the nifedipine and clofentezine pesticide through a large number of indoor bioassay tests and field pesticide effect tests, and the composition has an obvious synergistic effect in a certain range.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a synergistic composition for controlling citrus mites, which can reduce the using amount of pesticides, reduce the control cost, delay the generation of pest resistance and reduce the pollution to the environment in use. Compared with single agent, the pesticide has obviously raised preventing and controlling effect, less labor consumption, low cost and less burden on farmer.
The technical scheme of the invention is as follows:
a synergistic composition for preventing and treating citrus mites comprises the effective components of nitrofos and clofentezine in a mass ratio of 1-30: 1-20.
Preferably, the mass ratio of the nifedipine to the clofentezine is 5: 1.
The invention also provides a pesticide preparation of the synergistic composition for preventing and treating the citrus mites, wherein the mass of active ingredients of the pesticide preparation, namely the nitenpyram and the clofentezine, accounts for 1-90% of the total mass of the pesticide preparation, and the balance is an auxiliary agent acceptable in the pesticide pharmacy.
Preferably, the mass of the effective component of the synergistic composition for controlling citrus mites accounts for 31-70% of the total mass of the pesticide preparation, and the balance is an adjuvant acceptable in pesticide pharmacy.
Preferably, the pesticide preparation is in the form of emulsion in water, microemulsion, suspending agent, wettable powder or water dispersible granules.
Compared with the prior art, the invention has the following beneficial effects:
1. after the two effective components are compounded, the synergistic composition has an obvious synergistic effect and improves the control effect.
2. The synergistic composition has no cross resistance between two effective components, and can delay the generation of pest resistance after being compounded.
3. The synergistic composition of the invention can reduce the usage amount of pesticides, reduce the prevention and treatment cost and reduce the environmental pollution.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
First, pesticide preparation example
Example 1: 1% aqueous emulsion of nifedipine and clofentezine
Example 2: 21% aqueous emulsion of nitrapyrin and clofentezine
Example 3: 31% aqueous emulsion of nifedipine and clofentezine
The preparation method of the aqueous emulsion described in the above examples 1-3 is: dissolving the effective components of niclosamide and spirodiclofen with a solvent and a cosolvent fully, adding an emulsifier, a dispersant and a wetting agent, and stirring fully to form an oil phase; adding an antifreezing agent into water to dissolve to form a water phase; slowly adding the water phase into the oil phase, and shearing by using a high-speed shearing machine to obtain the aqueous emulsion.
Example 4: 5% Nitrophos-clofentezine microemulsion
Example 5: 8% Nitrophos-clofentezine microemulsion
Example 6: microemulsion of 15% nitro insect sulfur phosphorus and clofentezine
The preparation method of the microemulsion described in the above embodiments 4 to 6 is: dissolving the active ingredients of niclosamide and spirodiclofen with a solvent and a cosolvent fully, adding an emulsifier, and stirring fully to form an oil phase; adding an antifreezing agent into water to obtain a water phase; slowly adding the water phase into the oil phase, and shearing with a high-speed shearing machine to obtain transparent microemulsion.
Example 7: 20% suspending agent of nitre sulfur phosphorus and clofentezine
Example 8: 30% suspending agent of nitre sulfur phosphorus and clofentezine
Example 9: 50% suspending agent of nitre-insect sulfur-phosphor-clofentezine
The preparation method of the suspending agent described in the above examples 7 to 9 is: crushing the active ingredients of the niclosamide and the spirodiclofen by using a jet mill, putting the crushed active ingredients into a stirring kettle, simultaneously adding a dispersing agent, a wetting agent, an antifreezing agent and water, fully stirring, pumping the materials into a sand mill for fully grinding, pumping the materials into a high-speed shearing machine after grinding, adding a thickening agent, carrying out high-speed shearing, and obtaining the suspending agent after shearing.
Example 10: wettable powder of 50% nitrafenthion and clofentezine
Example 11: 60% wettable powder of nifedipine and clofentezine
Example 12: 80% wettable powder of nitrafenthion and clofentezine
The preparation method of the wettable powder described in the above examples 10 to 12 is: according to the formula proportion, the effective components and the preparation auxiliary components are uniformly mixed, crushed by a jet mill and uniformly mixed, and the wettable powder is prepared.
Example 13: 25% aqueous dispersion granule of nifedipine and clofentezine
Example 14: water dispersible granule of 50% nitrofos-clofentezine
Example 15: 70% nitrobenfop-clofentezine water dispersible granule
The preparation method of the water dispersible granule in the above examples 13-15 comprises the following steps: according to the formula proportion, the effective components and the preparation auxiliary components are uniformly mixed, crushed by a jet mill and uniformly mixed again, then a certain amount of water is added to knead the mixture, and the mixture is extruded and granulated, dried and screened to obtain the water dispersible granule.
Secondly, indoor toxicity test determination: indoor toxicity test of combination of nitrothion and clofentezine on citrus mites
1. Experimental materials: the test medicament comprises 90 percent of a nitrafenthion technical material and 98 percent of a clofentezine technical material; the test insects are the citrus leaf mites collected from an orchard and are the first generation nymphs after indoor feeding, breeding and hatching.
2. The test method comprises the following steps: a butterfly spraying method is adopted (refer to NY/T1154.13-2008 indoor bioassay pesticide standard part 13: butterfly spraying method).
3. The method comprises the following operation steps: 5 different concentration gradients are set for each single agent and mixed agent.
Selecting citrus leaves with consistent growth, making into butterfly by using a puncher, placing a wet sponge block in a culture dish, placing filter paper on the wet sponge block, placing 2 butterfly blocks on the filter paper, and selecting healthy citrus leaf mites with consistent age fed indoors to inoculate 20 citrus leaf mites on the butterfly.
Placing the culture dish connected with the butterfly under a potter spray tower, spraying under the pressure of 50PSI, wherein the spraying amount is 1ml, taking out the culture dish after settling for 1min, then placing the treated culture dish into a 12H/12H illumination incubator for culturing, checking the number of dead insects for 48H, and calculating the death rate. Repeat for 4 times and clear water blank control treatment.
4. The calculation method comprises the following steps: the test data were analyzed by the DPS statistical analysis software, and LC50 was calculated for each agent to evaluate the acaricidal activity of each agent. And calculating the co-toxicity coefficient (CTC value) of the mixture according to the Sun Tapei method.
The virulence index (ATI) was measured as (standard agent LC 50/test agent LC50) × 100.
Theoretical virulence index (TTI) ═ a agent virulence index x percent of a in the mixture + B agent virulence index x percent of B in the mixture.
Co-toxicity coefficient (CTC) × 100 [ measured toxicity index (ATI) of the mixture)/Theoretical Toxicity Index (TTI) of the mixture ].
According to the combined action division standard of NY/T1154.13-2008 acaricide: the co-toxicity coefficient (CTC) is more than or equal to 120 and shows a synergistic effect; the co-toxicity coefficient (CTC) is less than or equal to 80, and the antagonism is shown; 80< co-toxicity coefficient (CTC) <120 showed additive effect. The results are shown in Table 1.
TABLE 1 indoor Joint virulence determination of Nitrophos and Tetramite towards Tetranychus citrinae
As can be seen from the table 1, the mass ratio of the synergistic composition for controlling citrus mites is in the range of 1-30:1-20, and the co-toxicity coefficients are all more than 120, namely, the synergistic composition shows synergistic effect on the biological activity of the citrus mites; particularly, when the mass ratio is 5:1, the co-toxicity coefficient reaches 411.40, and the synergistic effect is more obvious.
Thirdly, field test: referring to GB/T17980.59-2004 field efficacy test guidelines (second) part 59: acaricide for preventing and controlling citrus rust mite
Test subjects: mandarin orange mite
And (3) test crops: maogu orange
Reagent to be tested: examples 1-6, 30% Nitrophos emulsifiable concentrate (commercially available), 20% clofentezine suspoemulsion (commercially available)
Medicament treatment:
setting a cell: 3 trees are fixed in each cell, the repetition is carried out for 4 times, and the cells are arranged according to random block groups. The conditions of tree species, tree age, growth vigor, water and fertilizer management and the like of all the districts are consistent.
The application time and method are as follows: the insecticide is applied once in the morning of the peak period of the citrus mites, and the spraying of wet leaves is taken as the standard.
Survey time and method: and respectively carrying out insect population density investigation at 1d, 7d and 14d before and after pesticide application, investigating 2 trees in each plot, marking the damaged leaves at the same tip stage in east, west, south, north and middle parts of the trees, investigating 2 visual fields, recording the number of live mites on the leaves, and calculating the mite population reduction rate and the control effect. And analyzing the experimental data by a Duncan's new complex range method (DMRT).
Oral cavity decline rate (%) [ (number of insects before application-number of insects after application)/number of insects before application ] × 100
The control effect (%) is [ (the oral cavity decline rate of the application region-the oral cavity decline rate of the control region)/(the oral cavity decline rate of the control region 100) ] × 100. The test results are shown in Table 2
Table 2 results of field experiments on the control of citrus mites after treatment with test agents
As can be seen from table 2, the control effect on citrus mites 1d, 7d, and 14d after application is significantly higher in the examples 1-6 than in the comparative agents, and the long duration of the traditional Chinese medicines in examples 1-6 indicates that the synergistic composition of the present invention has significant synergistic effect on citrus mites.
In conclusion, the synergistic composition for controlling citrus mites has an obvious synergistic effect, can reduce the using amount of pesticides, reduce the control cost, delay the generation of pest resistance and reduce the pollution to the environment, and has important significance.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (5)
1. The synergistic composition for controlling citrus mites is characterized in that: the active ingredients are compounded by the nitenpyram and the clofentezine, and the mass ratio of the nitenpyram to the clofentezine is 1-30: 1-20.
2. The synergistic citrus mite control composition according to claim 1, wherein: the mass ratio of the nitrafenthion to the clofentezine is 5: 1.
3. a pesticidal formulation comprising the synergistic composition for controlling citrus mites of claims 1 or 2, characterized by: the mass of the effective components of the pesticide preparation, namely the nifedipine and the clofentezine, accounts for 1-90% of the total mass of the pesticide preparation, and the balance is an auxiliary agent acceptable in the pesticide pharmacy.
4. The pesticide formulation according to claim 3, characterized in that: the mass of the effective component of the synergistic composition for preventing and treating the citrus mites accounts for 31-70% of the total mass of the pesticide preparation, and the balance is an adjuvant acceptable in pesticide pharmacy.
5. The pesticide formulation according to claim 4, characterized in that: the pesticide preparation is in the form of emulsion in water, microemulsion, suspending agent, wettable powder or water dispersible granules.
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| CN1056032C (en) * | 1995-08-02 | 2000-09-06 | 化工部农药剂型工程技术中心 | High-effective oil suspended mixture for killing mites and pests |
| CN100337546C (en) * | 2005-09-23 | 2007-09-19 | 四川省化学工业研究设计院 | Sulfur-phosphor built insext-killing mite-killing agent |
| CN107873726A (en) * | 2017-11-25 | 2018-04-06 | 惠州市无龄康态健康科技有限公司 | A kind of composition pesticide containing sulfur-phosphor and flufenzine |
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Application publication date: 20190514 Assignee: Yangshuo Qixianfeng Tea Industry Development Co.,Ltd. Assignor: GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRICULTURAL SCIENCES Contract record no.: X2023980046031 Denomination of invention: A synergistic composition for controlling citrus mites Granted publication date: 20210312 License type: Common License Record date: 20231108 Application publication date: 20190514 Assignee: Yangshuo Yulong River Ecological Agriculture Development Co.,Ltd. Assignor: GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRICULTURAL SCIENCES Contract record no.: X2023980046028 Denomination of invention: A synergistic composition for controlling citrus mites Granted publication date: 20210312 License type: Common License Record date: 20231108 Application publication date: 20190514 Assignee: Guizhu Jinju Professional Cooperative in Baisha Town, Yangshuo County Assignor: GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRICULTURAL SCIENCES Contract record no.: X2023980046026 Denomination of invention: A synergistic composition for controlling citrus mites Granted publication date: 20210312 License type: Common License Record date: 20231108 Application publication date: 20190514 Assignee: Guangxi Nanning Yuancheng Modern Agriculture Co.,Ltd. Assignor: GUANGXI ZHUANG AUTONOMOUS REGION ACADEMY OF AGRICULTURAL SCIENCES Contract record no.: X2023980046024 Denomination of invention: A synergistic composition for controlling citrus mites Granted publication date: 20210312 License type: Common License Record date: 20231108 |