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22 April 2021 Evaluating the Biological Potential of Prodigiosin from Serratia Marcescens KH-001 Against Asian Citrus Psyllid
Wei Hu, Rongkun Zheng, Yihong Liao, Fan Kuang, Zhaolan Yang, Tingtao Chen, Ning Zhang
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Abstract

The insecticides of microbial origin may be promising biocontrol agents to control pests. In this study, a major metabolite was extracted and purified from Serratia marcescens KH-001 and identified as prodigiosin with a molecule weight of 324.2094, and our primary aim was to evaluate the effects of prodigiosin against Diaphorina citri Kuwayama (Hemiptera: Liviidae) in the laboratory and in the field. Toxicity of purified prodigiosin to nymphs increased with increasing temperature from 25 to 35°C. The laboratory experiment results observed inhibition effects of purified prodigiosin at LC50 on oviposition and egg hatch of D. citri at 30°C. Furthermore, adults that fed on citrus leaves treated with LC20 and LC50 solution of purified prodigiosin at 30°C excreted less honeydew (28–35%) compared with controls, suggesting moderate antifeedant activity of prodigiosin. The results of field experiment showed that 10% prodigiosin emulsifiable concentrate exhibited better control efficacy (70–100%) at three concentrations (100, 200, and 500 mg/liter) in July and August than in October. These data indicate that prodigiosin will be a highly effective compound for the control of D. citri depending on the prevailing temperature conditions and may become a commercially available product to be widely used in citrus orchards.

© The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Wei Hu, Rongkun Zheng, Yihong Liao, Fan Kuang, Zhaolan Yang, Tingtao Chen, and Ning Zhang "Evaluating the Biological Potential of Prodigiosin from Serratia Marcescens KH-001 Against Asian Citrus Psyllid," Journal of Economic Entomology 114(3), 1219-1225, (22 April 2021). https://doi.org/10.1093/jee/toab041
Received: 14 December 2020; Accepted: 11 February 2021; Published: 22 April 2021
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