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Graphene nanomaterial-containing tree trunk injection liquid for preventing and treating citrus psylla

A technology of injecting dry liquid and nanomaterials, which is applied in the directions of pesticides, biocides, disinfectants, etc., can solve the problems of affecting the efficacy of drugs, over-frequent drug use, and narrow scope, so as to save the cost of prevention and control and reduce the number of spraying times. , a wide range of effects

Inactive Publication Date: 2019-03-08
杭州敦和科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems exist in the control of citrus psyllids by spraying pesticides: uneven spraying of pesticides, difficult to control psyllids in hidden places; difficult to control the time and frequency of spraying; excessive frequent use of pesticides with poor results, serious drug resistance and environmental pollution, etc.
This tree desiccant has several disadvantages. First, because it is an emulsifiable oil system, the pesticide active ingredient in the preparation is in a molecular state, but when it is injected into the tree, it is emulsified into particles with a particle size of 0.5-2 μm. Even larger, and will continue to grow over time, which directly affects the transport of pesticide active ingredients in the plant; secondly, because solvents are needed to dissolve pesticide active ingredients, on the one hand, solvents are often harmful to plants, and will dissolve plant cells. On the other hand, the solvent used is generally a polar solvent. After the solvent is absorbed, the active ingredients of the pesticide are easily crystallized and precipitated, thus affecting the efficacy of the drug.
In addition, solvents are generally weakly acidic or weakly alkaline, which often lead to degradation of active ingredients and solvent dissolution of packaging materials during long-term storage. Without solvents, the range of active ingredients for pesticides is extremely narrow, limited to water-soluble pesticides. Active ingredients, but cannot achieve the prevention and control of forest pests and diseases, and achieve the purpose of forest plant protection

Method used

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  • Graphene nanomaterial-containing tree trunk injection liquid for preventing and treating citrus psylla
  • Graphene nanomaterial-containing tree trunk injection liquid for preventing and treating citrus psylla

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides the preparation steps and performance testing method of the tree injection dry solution containing graphene nanomaterials for the prevention and treatment of citrus psyllids. The prepared tree injection dry solution includes the following raw materials in weight percentage:

[0032] Active ingredients: 0.2-20.0, graphene nanomaterials 0.1-30. Take a certain amount of active ingredients such as thiamethoxam, clothianidin, dinotefuran, imidacloprid, acetamiprid, etc., dissolve them in organic solvents (such as acetone, ethyl acetate, sec-butyl acetate, DMF, DMSO, etc.), and prepare Active ingredient solution.

[0033] Graphene aqueous solution or graphene oxide aqueous solution (10mg / mL), the weight ratio of reference active ingredient and graphene nanomaterial is 100: (10-500) ratio, prepares mixed solution. Place the mixed solution in a fume hood, stir for 24 hours to completely volatilize the organic solvent, or distill off the organic ...

Embodiment 2

[0036] 10% acetamiprid streptomycin tree injection dry solution (the weight ratio of active ingredient to graphene nanomaterial is 1:1)

[0037] Weigh 20 g of acetamiprid, slowly add 200 ml of ethyl acetate, and stir at room temperature for 0.5 hour to obtain acetamiprid transparent solution.

[0038] Add 20 g of streptomycin to 100 g of water to obtain a streptomycin solution.

[0039] Pour the above-mentioned acetamiprid transparent solution into 1000mL aqueous solution containing 40g nano-graphene oxide, then add streptomycin solution, distill the organic solvent under reduced pressure in a fume hood, weigh the weight of the remaining solution, add water to make the active ingredient The concentration is 10%, that is, a 10% acetamiprid-streptomycin dry injection liquid for trees is prepared.

[0040] The results showed that 10% acetamiprid·streptomycin dry injection solution for trees can be stably dispersed in aqueous solution and has good thermal stability.

Embodiment 3

[0042] 10% imidacloprid Jinggangmycin dry injection solution for trees (the weight ratio of active ingredient to graphene oxide nanomaterial is 1:0.8) weighed 8g of imidacloprid, slowly added 20m1 of DMF, stirred at room temperature for 5 minutes, and obtained a transparent imidacloprid solution.

[0043] Add 2 g of Jinggangmycin to 20 g of water to obtain Jinggangmycin solution.

[0044] Pour the above-mentioned imidacloprid transparent solution into 200mL aqueous solution containing 8g nanometer graphene oxide, then add Jinggangmycin solution, distill methanol under reduced pressure in a fume hood, weigh the weight of the remaining solution, and then add 10 grams of fatty alcohol polymer Oxyethylene ether and 20 grams of polyether, finally add water so that the concentration of the active ingredient is 10%, that is, a 10% imidacloprid·jinggangmycin dry injection liquid for trees is prepared.

[0045] The results showed that 10% imidacloprid·Jinggangmycin dry injection solution...

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PUM

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Abstract

The invention discloses graphene nanomaterial-containing tree trunk injection liquid for preventing and treating citrus psylla. The graphene nanomaterial-containing tree trunk injection liquid is prepared from the following raw materials in percentage by mass: 0.2 to 20.0 percent of an active component and 0.1 to 30 percent of a graphene nanomaterial, wherein a weight ratio of the active componentto the graphene nanomaterial is (100:10) to (100:500); the pesticide active component comprises a nicotine insecticide. The graphene nanomaterial-containing tree trunk injection liquid prepared by the invention is used for injecting medicine into tree trunks, the active component has very good vertical conductivity on a citrus wood layer after the graphene nanomaterial-containing tree trunk injection liquid is injected to the citrus wood layer, and the active component can also be easily conducted to a citrus phloem part in aspect of horizontal conduction so as to be conducted to tender tipsand roots, so that the effect of preventing and treating the citrus psylla can be achieved; the graphene nanomaterial-containing tree trunk injection liquid prepared by the invention is used for preventing and treating the citrus psylla, and the corrective control effect can be up to 93.4 percent after 40 days, so that the purpose of preventing and treating citrus huanglongbing can be achieved.

Description

technical field [0001] The invention belongs to the technical field of plant protection and is a tree desiccating agent containing graphene nanomaterials for preventing and treating citrus psyllids. Background technique [0002] Adults and nymphs of citrus psyllids directly suck the phloem juice of shoots, which not only affects the normal growth of citrus plants, but also spreads citrus Huanglongbing during the feeding process. The tree vigor of the infected tree declines, gradually loses the fruiting ability, and finally the tree body dies. Citrus psyllid and Huanglongbing have become a major problem restricting the sustainable development of citrus industries around the world. At present, chemical control of citrus psyllid is an important measure to control citrus huanglongbing. [0003] The occurrence of citrus psyllid is closely related to the new shoots of citrus trees, and the leaves of citrus are relatively dense. Only by comprehensive, efficient and long-term cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N43/90A01N51/00A01N47/40A01N47/44A01N43/707A01N43/653A01P7/04A01P1/00
CPCA01N25/04A01N43/653A01N43/707A01N43/90A01N47/40A01N47/44A01N51/00
Inventor 肖琳赵鲜梅
Owner 杭州敦和科技有限公司
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