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Phototoxicity of Ultraviolet-A against the Whitefly Bemisia tabaci and Its Compatibility with an Entomopathogenic Fungus and Whitefly Parasitoid

文献类型： 外文期刊

作者： Khan, Muhammad Musa 1 ; Fan, Ze-Yun 1 ; O'Neill Rothenberg, Dylan 4 ; Peng, Jing 1 ; Hafeez, Muhammad 5 ; Chen, Xin 1 ;

作者机构： 1.South China Agr Univ, Key Lab Biopesticide Innovat & Applicat Guangdong, Guangzhou 510642, Peoples R China

2.Minist Educ Guangdong Prov, Engn Res Ctr Biocontrol, Guangzhou 510640, Peoples R China

3.Guangdong Lab Lingnan Modern Agr, Guangzhou 510640, Peoples R China

4.South China Agr Univ, Coll Hort, Guangzhou 510642, Peoples R China

5.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou 310021, Peoples R China

期刊名称：OXIDATIVE MEDICINE AND CELLULAR LONGEVITY （ 影响因子：6.543； 五年影响因子：7.454 ）

ISSN： 1942-0900

年卷期： 2021 年 2021 卷

页码：

收录情况： SCI

摘要： Ultraviolet (UV) radiation significantly affects insect life and, as a result, has been widely used to control different invertebrate pests. The current results demonstrate that when Bemisia tabaci first instar nymphs are exposed to UV-A light for 12, 24, 48, and 72 h, their developmental and biological parameters are negatively affected by UV-A exposure; the effect increased with an increase in exposure time. We hypothesized that UV-A light is compatible with other biological control agents. Results showed that when the entomopathogenic fungus Cordyceps fumosorosea was applied to third instar nymphs of B. tabaci previously exposed to UV-A light, the LC50 was 3.4% lower after 72 h of exposure to UV-A light compared to the control. However, when the fungus was exposed to UV-A light, its virulence decreased with an increase in UV-A exposure time. The parasitism rate of Encarsia formosa against 24 h UV-A-exposed third instar nymphs of B. tabaci increased while the adult emergence from parasitized nymphs was not affected after UV-A light exposure. Parasitism rate was significantly reduced however following E. formosa exposure to UV-A light; but again, adult emergence was not affected from parasitized nymphs. The percentage mortality of E. formosa increased with increasing exposure time to UV-A light. The enzyme activity of SOD, CAT, GST, and AChE and the energy reserve contents were negatively affected due to UV-A exposure. Collectively, this study has demonstrated that UV-A light significantly suppresses the immune system of B. tabaci and that UV-A light is compatible with other biological control agents if it is applied separately from the biological agent.

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