The effects of temperature, relative humidity and host plant on the behaviour of Stethorus punctillum as a predator of the two-spotted mite, Tertanychus urticae

Rott, A.S. and Ponsonby, D.J. (2000) The effects of temperature, relative humidity and host plant on the behaviour of Stethorus punctillum as a predator of the two-spotted mite, Tertanychus urticae BioControl, 45 (2). pp. 155-164. ISSN 1573-8248

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Abstract

The predatory behaviour of Stethorus punctillum larvae was studied on the two-spotted spider mite (Tetranychus urticae), in order to assess how it responded to temperatures and relative humidities typical of glasshouse conditions on four edible crop plant species. Locomotory activity (distance covered, time spent walking, walking speed, angular velocity, and turning rate) was recorded at 20, 25 and 30 °C and relative humidity levels of 33%, 65% and 90% RH on tomato, pepper, aubergine and cucumber and analysed using video/computer techniques. The results show that activity of S. punctillum significantly increased at higher temperatures. Host plant species also strongly influenced the performance of the predator, which was most active on pepper and tomato and least active on aubergine. Relative humidity had no significant influence.

Item Type: Journal article
Subjects: C000 Biological and Biomedical Sciences > C300 Zoology
C000 Biological and Biomedical Sciences > C100 Biology
DOI (a stable link to the resource): 10.1023/A:1009982610696
Faculties: Faculty of Science and Engineering > School of Pharmacy and Biomolecular Sciences
Depositing User: editor spbs
Date Deposited: 11 Mar 2008
Last Modified: 17 May 2013 13:05
URI: http://eprints.brighton.ac.uk/id/eprint/4716

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