Part of this paper was presented at the International Organization of Biological Control Integrated Control in Protected Crops conference in 2008 and appears in the conference bulletin: IOBC/WPRS Bulletin 32: 67–70.
Effect of reduced risk pesticides for use in greenhouse vegetable production on Bombus impatiens (Hymenoptera: Apidae)†
Article first published online: 16 SEP 2009
Copyright © 2009 Society of Chemical Industry
Pest Management Science
Volume 66, Issue 2, pages 142–146, February 2010
How to Cite
Gradish, A. E., Scott-Dupree, C. D., Shipp, L., Harris, C. R. and Ferguson, G. (2010), Effect of reduced risk pesticides for use in greenhouse vegetable production on Bombus impatiens (Hymenoptera: Apidae). Pest. Manag. Sci., 66: 142–146. doi: 10.1002/ps.1846
- Issue published online: 5 JAN 2010
- Article first published online: 16 SEP 2009
- Manuscript Accepted: 6 JUL 2009
- Manuscript Revised: 23 JUN 2009
- Manuscript Received: 14 MAY 2009
- Canada Ontario Research and Development (CORD)
- Ontario Greenhouse Vegetable Growers
- Bombus impatiens;
- queen-less micro-colonies;
BACKGROUND: Bumble bees [Bombus impatiens (Cresson)] are widely used for supplemental pollination of greenhouse vegetables and are at risk of pesticide exposure while foraging. The objective of this study was to determine the lethal and sub-lethal effects of four insecticides (imidacloprid, abamectin, metaflumizone and chlorantraniliprole) and three fungicides (myclobutanil, potassium bicarbonate and cyprodinil + fludioxonil) used or with potential for use in Ontario greenhouse vegetable production to B. impatiens.
RESULTS: Imidacloprid, abamectin, and metaflumizone were harmful to worker bees following direct contact, while chlorantraniliprole and all fungicides tested were harmless. Worker bees fed imidacloprid-contaminated pollen had shortened life spans and were unable to produce brood. Worker bees consumed less pollen contaminated with abamectin. Metaflumizone, chlorantraniliprole and all fungicides tested caused no sub-lethal effects in bumble bee micro-colonies.
CONCLUSION: We conclude that the new reduced risk insecticides metaflumizone and chlorantraniliprole and the fungicides myclobutanil, potassium bicarbonate and cyprodinil + fludioxonil are safe for greenhouse use in the presence of bumble bees. This information can be used preserve greenhouse pollination programs while maintaining acceptable pest management. Copyright © 2009 Society of Chemical Industry