Entomogenous fungus strain SP433 with high pathogenic capability to bemisia tabaci and application thereof

Abstract

The invention relates to the field of biological control, in particular to an excellent strain which is pathogenic to bemisia tabaci, a beauveria bassiana strain SP433 preserved in Guangdong culture collection center (GDMCC) with the preservation number of GDMCC NO: 60589. By means of the reasonable experimental scheme, excellent strain screening indicators are comprehensively considered to obtainthe strain with excellent pathogenic capability to the bemisia tabaci, and the pathogenic capability is more stable than other tested strains. The strain has great potential for biological control ofthe bemisia tabaci.

Description

technical field [0001] The invention relates to the field of plant protection, in particular to the field of biological control, in particular to the biological control of Bemisia tabaci. Background technique [0002] Chemical pesticides play a huge role in pest control, and the use and output of pesticides in my country rank first in the world for a long time. However, according to statistics, the effective utilization rate of pesticides in the world is less than 30%, and the annual chemical pesticide use area in my country is 280 million hm 2 More than 500,000 to 600,000 tons of application amount, about 80% of chemical pesticides directly enter the environment (Li Liang, Zhang Zhanying, Sun Huiying, etc. Discussion on pesticide hazards and green plant protection technology [J]. Hubei Plant Protection, 2018, (4): 63-64). With the long-term and large-scale use of chemical pesticides, the "3R" problems, namely pest resistance (Resistance), pesticide residue (Residue) and p...

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Problems solved by technology

However, according to statistics, the effective utilization rate of pesticides in the world is less than 30%, and the annual chemical pesticide use area in my country is 280 million hm 2 More than 500,000 to 600,000 tons of application amount, about 80% of chemical pesticides directly enter the environment (Li Liang, Zhang Zhanying, Sun Huiying, etc. Discussion on pesticide hazards and green plant protection technology [J]. Hubei Plant Protection, 2018, (4): 63-64)

[0006] Whitefly nymphs have a waxy shell, are often fixed and adsorbed on the crop surface, and only use piercing-sucking mouthparts to harm crops, thus increasing the difficulty of control (Liu Zhao, Lei Zhongren. Insects with high pathogenicity to whitefly Screening of fungi [J]. Chinese Vegetables, 2014, 1(3): 37-40); since 2000, there has been a major outbreak in my country and the distribution range has been continuously expanding, resulting in disasters, causing heavy losses to important economic crops (Chu D, Wan F H, Zhang Y J, et al. Change in the biotype composition of Bemisia tabaci in Shandong Province of China from 2005 to 2008[J].Environmental Entomology,2010,39(3):1028-1036)

The chemical insecticides commonly used to control Bemisia tabaci are difficult to penetrate into the body, and often in order to achieve the control effect, the dosage must be increased, which not only increases the cost but also pollutes the environment, and even produces resistance to the pests

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