Releases of the egg parasitoid, Edovum puttleri Grissell, in plots of potatoes, Solanum tuberosum L., during 1984 and 1985 in Ontario and New Brunswick, Canada, resulted in limited reduction of populations of the Colorado potato beetle (CPB),Leptinotarsa decemlineata (Say). Temperatures that averaged below 20°C during the spring when eggs of the CPB were abundant limited the activity of this parasitoid. Parasitism never exceeded 10% in the early part of the season, but mortality caused by probing and subsequent host feeding often exceeded 40%.
Document Type: Research Article
Publication date: June 1, 1989
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