Electrophysiological and behavioural responses of the pollen beetle, Meligethes aeneus, to volatiles from a non-host plant, lavender, Lavandula angustifolia (Lamiaceae) |
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Authors: | Alice L Mauchline Michael A Birkett Christine M Woodcock John A Pickett Juliet L Osborne Wilf Powell |
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Institution: | (1) Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK |
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Abstract: | A semiochemical based push-pull strategy for control of oilseed rape pests is being developed at Rothamsted Research. This
strategy uses insect and plant derived semiochemicals to manipulate pests and their natural enemies. An important element
within this strategy is an understanding of the importance of non-host plant cues for pest insects and how such signals could
be used to manipulate their behaviour. Previous studies using a range of non-host plants have shown that, for the pollen beetle
Meligethes aeneus (Coleoptera: Nitidulidae), the essential oil of lavender, Lavandula angustifolia (Lamiaceae), was the most repellent. The aim of this study was to identify the active components in L. angustifolia oil, and to investigate the behaviour of M. aeneus to these chemicals, to establish the most effective use of repellent stimuli to disrupt colonisation of oilseed rape crops.
Coupled gas chromatography-electroantennography (GC-EAG) and gas chromatography-mass spectrometry (GC-MS) resulted in the
identification of seven active compounds which were tested for behavioural activity using a 4-way olfactometer. Repellent
responses were observed with (±)-linalool and (±)-linalyl acetate. The use of these chemicals within a push-pull pest control
strategy is discussed.
Handling Editor: Yvan Rahbe. |
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Keywords: | Coleoptera Behaviour Electroantennography Meligethes aeneus Nitidulidae Non-host plant Olfactometer Pollen beetle Repellent Volatiles |
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