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Method for increasing effect activity of chemical agent on brown planthopper by using insecticidal bacteria

A technology of chemical agents and brown planthoppers, applied in the direction of insecticides, botanical equipment and methods, biocides, etc., can solve the problems of few research reports, achieve obvious synergies, slow down the development of resistance, and improve the effect of control

Inactive Publication Date: 2017-04-26
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Can insecticidal bacteria enhance the activity of chemical insecticides against pests? There are few research reports on this

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The effect of Serratia marcescens on the activity of thiamethoxam treated by Nilaparvata lugens was compared. It can be seen that the mortality rate of brown planthopper was 67.5% after treatment with clear water and then with 6mg / L thiamethoxam, while 3×10 8 After cfu / ml Serratia marcescens is processed, survival nymph is processed with 6mg / L thiamethoxam again, and the mortality rate of pest is 86.2%, is significantly higher than contrast (F 1，9 =7.337, P=0.027), indicating that Serratia marcescens increased the sensitivity of N. lugens to thiamethoxam.

Embodiment 2

[0027] Compared the effect of Serratia marcescens on the activity of pymetrozine in N. lugens planthopper, it was found that 10 9 cfu / ml, 3×10 8 cfu / ml, 10 8 Cfu / ml 3 concentrations of insecticidal bacteria significantly increased the activity of 7mg / L pymetrozine on planthoppers, 10 9 cfu / ml of Serratia marcescens treated with pymetrozine, the death rate of brown planthoppers was 40.7%, and treated with clean water and then treated with pymetrozine, the mortality rate of pests was 17.2%. Significant difference (F 2，15 =24.811, P=0.004); 3×10 8 After cfu / ml Serratia marcescens was treated, the lethality rate of pymetrozine to BPH was 39.7%, while the control mortality rate was only 11.3%, significantly lower than the former (F 2，13 =7.954, P=0.037); 10 8 cfu / ml Serratia marcescens also increased the activity of pymetrozine on pests, and the mortality rate of brown planthopper was 34.1%, which was still significantly higher than that of the clean water control group 17.2% ...

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PUM

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Abstract

The invention discloses a method for increasing effect activity of chemical agent on brown planthopper by using insecticidal bacteria. The insecticidal microbe and a chemical pesticide are combined for usage to generate synergistic, neutral or antagonistic effects. By aiming at large insects on production, the effective insecticidal microbe is screened for synergistic combination with a chemical agent, and the safe and efficient control level of the insects can be obviously increased. and the control of large brown planthopper in paddy rice is mainly dependent on the chemical agent. The method uses sub-lethal dosage for killing bacterial serratia marcescens, can obviously increase the effect activity of the chemical agent thiamethoxam and on brown planthopper, and reduces the usage amount of the chemical agent. Reasonable utilization of the combined synergy effect of the insecticidal bacteria and the chemical agent can effectively increased the control effect on the insects, reduces the usage amount of the chemical pesticide, alleviates insect resistance process, and increases the protection effect on environment.

Description

[0001] 1. Technical field [0002] The invention belongs to the technical field of pest prevention and control, and in particular relates to a method for improving the action activity of chemical drugs on brown planthopper agents by using the insecticidal bacterium Serratia marcescens. [0003] 2. Technical background [0004] At present, chemical pesticide control is still the main emergency control method for pests. Long-term use of a large number of single chemical agents has made pests resistant to many agents. Insecticidal microorganisms are an important class of pest biological control resources, and some pathogenic microorganisms can regulate the population of pests in the natural environment. The combination of insecticidal microorganisms and chemical pesticides can produce synergistic, neutral or antagonistic effects. Reasonable use of the synergistic effect of insecticidal microorganisms and chemical agents can not only effectively improve the control effect on pest...

Claims

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Application Information

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IPC IPC(8): A01N63/00A01N51/00A01N43/707A01P7/04
CPCA01N43/707A01N51/00A01N63/00A01N2300/00
Inventor 郭慧芳万秀秀牛洪涛刘宝生
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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