Guo-Feng Mao,Xiao-Chang Mo,Hatem Fouad,Ghulam Abbas,Jian-Chu Mo
Utilisation of Anagrus nilaparvatae is a promising and effective method for planthoppers manipulation. Twenty-seven components of remote lemongrass (Cymbopogon distans) oil were identified by GC/MS and nine volatiles were selected for behavioural experiments. In this study, we noted that the remote lemongrass oil was attractive to female A. nilaparvatae at concentrations of 0.1 and 1 mg/L. α-Pinene, β-pinene, eucalyptol, carveol and D-carvone attracted female wasps in the dose-dependent bioassays. Blend 1 (a mixture of eucalyptol, D-carvone, carveol, α-pinene, and β-pinene with ratios of remote lemongrass oil volatiles of 625:80:11:5:3) attracted female wasps at 10 mg/L, while blend 2 (a mixture of the same five volatiles at the same loading ratio) attracted them at 0.1 and 1 mg/L. These results suggested that plant essential oils could be attractants for natural enemies to control pests. The ratios of volatiles in the mixtures affect the attractiveness of the synthetic mixtures.
Guofeng Mao,Jiaxin Tian,Ting Li,Hatem Fouad,Hassan Ga'al,Jianchu Mo
The attraction of parasitoids to their hosts is a key issue in efforts to enhance biological control efficiency. This study was conducted to identify which rice plant volatiles are attractive to females of the rice planthopper egg parasitoid Anagrus nilaparvatae Pang et Wang (Hymenoptera: Mymaridae) by using Y-tube olfactometer behavior assays. Our results demonstrated that 10 of 17 selected volatiles – that is, 3-carene, linalool oxide, linalool, benzyl alcohol, benzaldehyde, methyl salicylate, ( E )-2-hexenal, ( E )-2-hexen-1-ol, ( E )-3-hexen-1-ol, and hexanal – from three major groups of rice plant volatiles – terpenoids, aromatic compounds, fatty acid derivatives – attracted female A. nilaparvatae at various doses. Two full-component mixtures of 10 behaviorally active compounds at different ratios were more attractive to wasps compared with individual volatiles. Blends composed of the 10 behaviorally active compounds in their optimally attractive doses (i.e., each in the dose that elicited the strongest response in the wasps) or at equal mass ratio may be considered as attractants for A. nilaparvatae and thus help to control rice planthoppers.
危险品化学品经营许可证（带存储）