J. ent. Soc. Ont. V 143, 2012
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Volume 143, 2012 I. FROM THE EDITOR ... 1 [PDF] II. ARTICLES III. NOTES H. MURILLO, D. W. A. HUNT and S. L. VANLAERHOVEN — Larval parasitoids of the Cabbage Looper, Trichoplusia ni (Lepidoptera: Noctuidae), in field tomato crops in southwestern Ontario ... 115–119 [PDF] LARVAL PARASITOIDS OF THE CABBAGE LOOPER, TRICHOPLUSIA NI (LEPIDOPTERA: NOCTUIDAE), IN FIELD TOMATO CROPS IN SOUTHWESTERN ONTARIO H. MURILLO1, D. W. A. HUNT2, S. L. VANLAERHOVEN3 Department of Biology, University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada N9B 3P4. email: [email protected] J. ent. Soc. Ont. V 143, 2012 Abstract (Scientific Note) The Cabbage Looper, Trichoplusia ni Hübner (Lepidoptera: Noctuidae) is a cosmopolitan insect pest that causes damage in more than 160 species of plants (Sutherland and Greene 1984), and has become a chronic pest of Canadian greenhouse vegetable crops (Gillespie et al. 2002). Each spring, the overwintering population of T. ni migrates north from the southern United States to establish seasonal populations in Canada (Lafontaine and Poole 1991). In commercial indoor settings, growers rely on Btk (Bacillus thuringiensis var. kurstaki) products to manage outbreaks of T. ni. Outdoors, growers rely on chemical pesticides. Btk appears to be compatible with natural enemies and insect pollinators although the recent development of T. ni resistance to Btk is a major concern in the vegetable industry (Janmaat and Myers 2003) and new and effective natural enemies are needed. The objective of this study was to determine the native parasitoid assemblage of larval stages of T. ni in tomato fields in southwestern Ontario for the selection of potential biological control agents. |
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