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CN-121986791-A - Bactericidal composition for preventing and treating asparagus stem blight and preparation method thereof

CN121986791ACN 121986791 ACN121986791 ACN 121986791ACN-121986791-A

Abstract

The invention relates to the technical field of agricultural biological control, in particular to a bactericidal composition for controlling asparagus stem blight and a preparation method thereof. The composition comprises, by mass, 1-20 parts of fluopyram, 1-20 parts of shenqimycin, 0.1-1 part of an organosilicon surfactant, 5-30 parts of an auxiliary agent and 29-92.9 parts of water. The fluopyram and the shenqinmycin are compounded according to a specific proportion, the action mechanisms of the fluopyram and the shenqinmycin are complementary, the control effect on the stem blight of asparagus is obviously improved, meanwhile, the introduced organic silicon surfactant can reduce the surface tension of liquid medicine, enhance the adhesion and spreading capability of thick wax layers of asparagus, improve the utilization rate of active ingredients, solve the problem of drug resistance enhancement caused by long-term use of a single chemical agent by compounding the biological source shenqinmycin and the chemical agent fluopyram, reduce the number of times and the dosage of the drug, reduce the environmental residue risk by introducing biological source components, and take the control effect and ecological safety into account.

Inventors

  • Duan Lingtao
  • YANG YINGQING
  • WANG XI
  • ZHANG XU
  • WANG ZHENGYANG
  • LIU ZHEHUI
  • SHU CANWEI
  • YIN CHANGFA
  • LAN BO
  • LIANG YUYONG

Assignees

  • 江西省农业科学院植物保护研究所

Dates

Publication Date
20260508
Application Date
20260202

Claims (10)

  1. 1. The sterilizing composition for preventing and treating the stem blight of asparagus is characterized by comprising the following components in parts by mass: 1-20 parts of fluopyram, 1-20 parts of shenqimycin, 0.1-1 part of organic silicon surfactant, 5-30 parts of auxiliary agent and 29-92.9 parts of water.
  2. 2. The bactericidal composition for preventing and treating stem blight of asparagus as claimed in claim 1, wherein the mass ratio of fluopyram to shenzinomycin is 5:1.
  3. 3. A fungicidal composition for the control of stem blight of asparagus as claimed in claim 1 or claim 2, wherein the silicone surfactant comprises polyether modified trisiloxane.
  4. 4. The fungicidal composition for the control of stem blight of asparagus as claimed in claim 1 or 2, wherein the auxiliary agent comprises at least one of a dispersant, a wetting agent, a thickener and an antifreezing agent.
  5. 5. The bactericidal composition for controlling stem blight of asparagus of claim 4, wherein the dispersant comprises at least one of sodium lignosulfonate and polycarboxylate.
  6. 6. A fungicidal composition for controlling the blight of asparagus as claimed in claim 4, wherein the wetting agent comprises an alkyl naphthalene sulfonate.
  7. 7. The fungicidal composition for the control of asparagus stalk blight according to claim 4, wherein the thickener comprises xanthan gum.
  8. 8. The fungicidal composition for controlling the stem blight of asparagus of claim 4, wherein the cryoprotectant comprises propylene glycol.
  9. 9. A method for preparing the bactericidal composition for preventing and treating stem blight of asparagus as claimed in any one of claims 1 to 8, comprising the steps of: The components are mixed to obtain the bactericidal composition for preventing and treating the stem blight of asparagus.
  10. 10. The method for preparing a bactericidal composition for controlling stem blight of asparagus as recited in claim 9, wherein the step of adding a pH adjustor to adjust pH to 6.5-7.0 is further included after mixing the components.

Description

Bactericidal composition for preventing and treating asparagus stem blight and preparation method thereof Technical Field The invention relates to the technical field of agricultural biological control, in particular to a bactericidal composition for controlling asparagus stem blight and a preparation method thereof. Background As an economic crop which is called as the king of vegetables in the international market, the asparagus is rich in amino acid, protein, vitamin, microelements such as selenium and molybdenum, is rich in nutrition, and has pharmacological effects of regulating organism metabolism, improving immunity and the like. However, the development of the asparagus industry is severely restricted by the stem blight of asparagus as a destructive disease caused by phomopsis. The disease is widely distributed and deeply endangered, is called as 'cancer of asparagus', and the stem part appears milky white small spots at the initial stage of the disease, then expands into spindle-shaped or oval brown spots, the center is sunken and forms conidium devices, and finally the stem base and the stem leaves of plants are restrained, and the whole plant dies rapidly. When the disease is slight, the plants are died sporadically, the yield is reduced, and when the disease is severe, the whole field can be destroyed, the plants are dead, and huge losses are caused for the growers. At present, the prevention and treatment of asparagus stem blight still takes chemical bactericides as main materials, and common medicaments comprise difenoconazole, pyraclostrobin and the like. However, the long-term single use of these chemical agents leads to sustained enhancement of pathogenic bacterial resistance and gradual decline of the drug effect. In addition, the use of chemical agents in large quantities also brings environmental residue risks, and affects ecological balance and agricultural product safety. Although the biological source bactericide and part of the compound composition are tried to be used for prevention and treatment, the single biological source medicament has unstable prevention effect and is difficult to cope with severe morbidity, and the existing compound composition has the problems of large fluctuation of prevention effect, short duration and the like due to insufficient cooperativity of components or lack of optimization of drug effect durability. Disclosure of Invention Aiming at the problems of insufficient and unstable drug effect in the prevention and treatment of asparagus stem blight in the prior art, the invention provides a sterilizing composition for preventing and treating the asparagus stem blight and a preparation method thereof. The invention provides a sterilizing composition for preventing and treating asparagus stem blight, which comprises the following components in parts by mass: 1-20 parts of fluopyram, 1-20 parts of shenqimycin, 0.1-1 part of organic silicon surfactant, 5-30 parts of auxiliary agent and 29-92.9 parts of water. Preferably, the mass ratio of fluopyram to shenqinmycin is 5:1. Preferably, the silicone surfactant comprises a polyether modified trisiloxane. Preferably, the auxiliary agent includes at least one of a dispersant, a wetting agent, a thickener, and an antifreezing agent. Preferably, the dispersing agent comprises at least one of sodium lignin sulfonate and polycarboxylate. Preferably, the wetting agent comprises an alkyl naphthalene sulfonate. Preferably, the thickener comprises xanthan gum. Preferably, the antifreeze agent comprises propylene glycol. The invention also provides a preparation method of the bactericidal composition for preventing and treating the stem blight of asparagus, which comprises the following steps: The components are mixed to obtain the bactericidal composition for preventing and treating the stem blight of asparagus. Preferably, the steps of adding a pH regulator to adjust the pH value to 6.5-7.0 are also included after the components are mixed. The beneficial effects of the invention are as follows: 1. The invention provides a bactericidal composition for preventing and treating asparagus stem blight, which comprises the following components, by mass, 1-20 parts of fluopyram, 1-20 parts of shenqimycin, 0.1-1 part of an organosilicon surfactant, 5-30 parts of an auxiliary agent and 29-92.9 parts of water. The invention combines fluopyram and shenqinmycin according to a specific proportion, the action mechanisms of the fluopyram and the shenqinmycin are complementary (the former inhibits germ mitochondrial respiration, the latter induces plants to produce disease resistance), thereby obviously improving the control effect on asparagus stem blight, simultaneously, the introduced organic silicon surfactant can reduce the surface tension of liquid medicine, enhance the attaching and spreading capability of thick wax layer of asparagus, improve the utilization rate of active ingredients, and the combination of biological source she