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Evaluating the Biological Potential of Prodigiosin from Serratia Marcescens KH-001 Against Asian Citrus Psyllid.
Journal of Economic Entomology ( IF 2.2 ) Pub Date : 2021-04-22 , DOI: 10.1093/jee/toab041
Wei Hu 1 , Rongkun Zheng 1 , Yihong Liao 1 , Fan Kuang 1 , Zhaolan Yang 1 , Tingtao Chen 2 , Ning Zhang 1
Affiliation  

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.

中文翻译:

评估粘质沙雷氏菌KH-001中的Prodigiosin对亚洲柑橘木虱的生物潜力。

微生物来源的杀虫剂可能是有前途的生物控制剂来控制害虫。在这项研究中,主要代谢物是从粘质沙雷氏菌KH-001中提取和纯化的,并被鉴定为分子量为324.2094的prodigiosin,我们的主要目的是评估prodigiosin对苹果黄褐藻(Hemiptera:Liviidae)的作用。实验室和现场。纯化的prodigiosin对若虫的毒性随着温度从25升高到35°C而增加。实验室实验结果观察到在30°C下纯化的prodigiosin对柠檬酸D.citri的产卵和卵孵化的抑制作用。此外,与对照组相比,在30°C下以纯净的prodigiosin的LC20和LC50溶液处理的柑橘叶上觅食的成虫排泄的蜜露较少(28-35%),提示prodigiosin具有中等的拒食活性。田间实验的结果表明,在三种浓度(100、200和500 mg / L)下,10%的prodigiosin乳油在10月和7月的三个浓度(100、200和500 mg / L)表现出更好的防治效果(70-100%)。这些数据表明,视主要的温度条件而定,prodigiosin将是一种用于控制柑桔D. citri的高效化合物,并可能成为广泛用于柑桔园的市售产品。
更新日期:2021-04-22
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