期刊
BIOCONTROL SCIENCE AND TECHNOLOGY
卷 29, 期 5, 页码 451-465出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09583157.2019.1566437
关键词
Biological control; egg predation; lady beetles; alternative prey; carabid beetles
资金
- Pesticide Risk Reduction Program of AAFC's Pest Management Centre as a part of post-graduate research affiliate program
- Natural Sciences and Engineering Research Council Discovery Grant Program
The cereal leaf beetle (CLB), Oulema melanopus (L.) (Coleoptera: Chrysomelidae), is an invasive pest in North America recently reported in the Canadian Prairies. We performed a series of laboratory assays to identify potential predators and a field study to quantify predation of CLB eggs. In no-choice Petri dish assays, ground beetles (Carabidae), rove beetles (Staphylinidae), and several common lady beetle species (Coccinellidae) were the most consistent predators of eggs and larvae. Nabis spp. (Hemiptera: Nabidae) and wolf spiders (Araneae: Lycosidae) consumed many larvae, but did not consume eggs. Hippodamia spp., Coccinella septempunctata (L.) (Coleoptera: Coccinellidae), and Pterostichus melanarius (Illiger) (Coleoptera: Carabidae) also fed on CLB eggs on potted plants when an alternative food source was available, Sitobion avenae (Fabricius) (Hemiptera: Aphididae). In our field study, we found an average of 24.5% of sentinel eggs disappeared over a 24 h period, likely due to predation. Our results suggest that generalist predators can play an important role in the biological control of CLB, and warrant further study.
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