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Electroantennogram, behavioural responses, and field trapping of Trypophloeus klimeschi (Coleoptera: Curculionidae: Scolytinae) to eight host volatiles

Published online by Cambridge University Press:  12 February 2019

Guanqun Gao ,
Lulu Dai ,
Jing Gao ,
Jiaxing Wang  and
Hui Chen
Guanqun Gao
Affiliation:
State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources (South China Agricultural University), Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
Lulu Dai
Affiliation:
College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi 712100, China
Jing Gao
Affiliation:
College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi 712100, China
Jiaxing Wang
Affiliation:
College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi 712100, China
Hui Chen*
Affiliation:
State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources (South China Agricultural University), Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
*
1Corresponding author (e-mail: chenhui@nwsuaf.edu.cn)
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Abstract

Trypophloeus klimeschi Eggers (Coleoptera: Curculionidae: Scolytinae) was first discovered in China in 2003, and it exhibits strong species specificity to Populus alba var. pyramidalis Bunge (Salicaceae). To screen plant volatile compounds for monitoring and trapping T. klimeschi, the electroantennogram responses of adult T. klimeschi to eight plant volatiles, including nonanal, 2-methylbutanal, decanal, 2-hydroxybenzaldehyde, (Z)-3-hexen-1-ol benzoate, methyl benzoate, methyl salicylate, and geraniol were tested at various concentrations. Behavioural responses of female and male adults to various concentrations of these eight plant volatiles were also determined using a Y-tube olfactometer. We then tested the effectiveness of these compounds as lures for trapping T. klimeschi in the field. Electroantennogram tests showed that T. klimeschi possesses olfactory sensitivity for eight compounds. Additionally, walking T. klimeschi exhibited attraction to low concentrations (≤ 1 μg/μL) of all eight compounds in Y-tube olfactometer. Field experiment results indicated that baits composed of each volatile compound alone were more attractive to greater numbers of T. klimeschi than the control. The methyl benzoate bait was better attracted by T. klimeschi than other tested volatiles. These results suggest that these compounds could be used in attraction of this stem-boring pest. This study could have important implications for the development of an effective semiochemical-based management tool for T. klimeschi in the field.

Type
Insect Management
Information
The Canadian Entomologist , Volume 151 , Issue 2 , April 2019 , pp. 236 - 250
Copyright
© Entomological Society of Canada 2019 

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Footnotes

Subject editor: Barbara Bentz

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