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Volatiles from Sophora japonica flowers attract Harmonia axyridis adults (Coleoptera: Coccinellidae)

文献类型： 外文期刊

作者： Xiu Chun-li 1 ; Xu Bin 1 ; Pan Hong-sheng 4 ; Zhang Wei 1 ; Yang Yi-zhong 2 ; Lu Yan-hui 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

2.Yangzhou Univ, Coll Hort & Plant Protect, Yangzhou 225007, Jiangsu, Peoples R China

3.Lixiahe Reg Inst Agr Sci Jiangsu, Yangzhou 225007, Jiangsu, Peoples R China

4.Xinjiang Acad Agr Sci, Inst Plant Protect, Urumqi 830091, Peoples R China

关键词： flower preference; plant volatile; electrophysiological response; behavioral response; attractants

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2019 年 18 卷 4 期

页码：

收录情况： SCI

摘要： The multicolored Asian lady beetle, Harmonia axyridis (Coleoptera: Coccinellidae), is a common generalist predator in China and is occasionally found gathering on the Chinese pagoda tree, Sophora japonica, in summer. In a field investigation, we found that H. axyridis adults preferred S. japonica during its flowering period even though their optimal prey (aphid) is absent at this time. In addition, male and female adults were attracted to S. japonica flowers to a similar extent in a Y-tube olfactometer assay. Using coupled gas chromatography-electroantennogram detection (GC-EAD), we identified a flower odor component (nonanal) that elicited a significant electrophysiological response in H. axyridis. Electroantennogram (EAG) dose-dependent responses revealed that the amplitude of the adult beetle's EAG response increased with increasing concentration of nonanal, peaking at 10 mg mL(-1). In Y-tube olfactometer behavioral tests, H. axyridis adults preferred a 10 mg mL(-1) nonanal source over a 100 mg mL(-1) diluent. Under field conditions, the adults were significantly attracted to both concentrations (10 and 100 mg mL(-1)), and high concentrations generally had greater attraction. All these results suggest that nonanal, a volatile compound of S. japonica flowers, greatly attracts H. axyridis adults. This study provides a basis for the development of synthetic attractants of H. axyridis, with the potential to promote biocontrol services of this generalist predator in the native area (e.g., China) and to suppress its population by mass trapping in its invasive areas.

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