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Tomato fruit size, maturity and α-tomatine content influence the performance of larvae of potato tuber moth Phthorimaea operculella (Lepidoptera: Gelechiidae)

Published online by Cambridge University Press:  09 March 2007

B. Mulatu ,
S.W. Applebaum ,
Z. Kerem  and
M. Coll
B. Mulatu
Affiliation:
Ethiopian Agricultural Research Organization, PO Box 2003, Addis Ababa, Ethiopia
S.W. Applebaum
Affiliation:
Department of Entomology, The Hebrew University of Jerusalem, PO Box 12, Rehovot, 76100, Israel
Z. Kerem
Affiliation:
Institute of Biochemistry Food Science and Nutrition, The Hebrew University of Jerusalem, PO Box 12, Rehovot, 76100, Israel
M. Coll*
Affiliation:
Department of Entomology, The Hebrew University of Jerusalem, PO Box 12, Rehovot, 76100, Israel
*
*Fax: 972 8 946 6768 E-mail: coll@agri.huji.ac.il
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Abstract

Various physical and chemical properties of host plants influence insect larval performance and subsequent adult fitness. Tomato plants are relatively new hosts to the potato tuber moth, Phthorimaea operculella (Zeller), with the fruit being its preferred feeding site. However, it is unclear how the biochemical and physical properties of tomato fruits relate to potato tuber moth performance. Significant amounts of α-tomatine were detected in maturing green and ripening fruits of cherry (cv. Ceres) and processing (cv. Serio) types of tomatoes whereas none was detected in a fresh market variety (cv. Marglobe), at comparable stages. α-Tomatine is negatively and significantly correlated with development rate (head capsule size) of larvae reared in the fruits of the cherry and processing type tomatoes. Generally, survival, growth and development were significantly superior for larvae reared in the ripening fruits of the fresh market cultivar. At this stage, the fruits of this cultivar are also the largest. Based on these results it is concluded that fruit α-tomatine content, as wellas fruit size and maturity, all affect performance of P. operculella larvae in the fruits of cultivated tomatoes.

Keywords

herbivoryinsect–plant interactionsPhthorimaea operculellapotato tuber mothsecondary plant compoundstomatinetomato
Type
Review Article
Information
Bulletin of Entomological Research , Volume 96 , Issue 2 , April 2006 , pp. 173 - 178
Copyright
Copyright © Cambridge University Press 2006

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