New Zealand Journal of Crop and Horticultural Science abstracts

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Electronically monitored stylet penetration pathway of woolly apple aphid, Eriosoma lanigerum (Homoptera: Aphididae), on apple (Malus domestica)

W. R. M. Sandanayaka
C. N. Hale

The Horticulture and Food Research
Institute of New Zealand Ltd
Mt Albert Research Centre
Private Bag 92 169
Auckland, New Zealand
email: msandanayaka@hortresearch.co.nz

Abstract  The probing behaviour of woolly apple aphid, Eriosoma lanigerum (Homoptera: Aphididae), was monitored on woody tissues of the susceptible apple (Malus domestica) cultivar ‘Royal Gala’, using the Electrical Penetration Graph (EPG) technique. The stylet penetration pathway of the probing aphid was studied by analysing the waveforms of different patterns and voltage levels. The waveforms A, B, C, G, E1, and E2 were recorded from E. lanigerum and have known correlations with probing events of aphid species that feed on soft plant tissues. The differences in frequencies and relative amplitude of A and E1 waveforms are discussed in relation to the probing behaviour of woolly apple aphid on woody plant tissues.

Keywords  Electrical Penetration Graph; woody plant tissues; Eriosoma lanigerum; probing behaviour; stylet pathway

H02093 Received 27 November 2002, accepted 17 March 2003; published 12 June 2003
New Zealand Journal of Crop and Horticultural Science, 2003, Vol. 31: 107-113
0014-0671/03/3102-0107 $7.00 © The Royal Society of New Zealand 2003

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