| Autor: |
Hu, Wei, Zheng, Rongkun, Liao, Yihong, Kuang, Fan, Yang, Zhaolan, Chen, Tingtao, Zhang, Ning |
| Zdroj: |
Journal of Economic Entomology; June 2021, Vol. 114 Issue: 3 p1219-1225, 7p |
| Abstrakt: |
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 marcescensKH-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 citriKuwayama (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 LC50on oviposition and egg hatch of D. citriat 30°C. Furthermore, adults that fed on citrus leaves treated with LC20and LC50solution 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. citridepending on the prevailing temperature conditions and may become a commercially available product to be widely used in citrus orchards. |
| Databáze: |
Supplemental Index |
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