A large-scale field study examining effects of exposure to clothianidin seed-treated canola on honey bee colony health, development, and overwintering success

PeerJ, Journal Year: 2014, Volume and Issue: 2, P. e652 - e652

Published: Oct. 30, 2014

In summer 2012, we initiated a large-scale field experiment in southern Ontario, Canada, to determine whether exposure clothianidin seed-treated canola (oil seed rape) has any adverse impacts on honey bees. Colonies were placed or control fields during bloom, and thereafter moved an apiary with no surrounding crops grown from seeds treated neonicotinoids. Colony weight gain, production, pest incidence, bee mortality, number of adults, amount sealed brood assessed each colony throughout autumn. Samples honey, beeswax, pollen, nectar regularly collected, samples analyzed for residues. Several these endpoints also measured spring 2013. Overall, colonies vigorous after the period, found effects endpoint measures. Bees foraged heavily test peak bloom residue analysis indicated that bees exposed low levels (0.5–2 ppb) pollen. Low detected few pollen collected toward end hives, illustrating difficulty conducting perfectly controlled study free-ranging agricultural landscapes. Overwintering success did not differ significantly between treatment was similar overwintering loss rates reported winter 2012–2013 beekeepers Ontario Canada. Our results suggest poses risk

Language: Английский

Preventing mosquito and tick bites: A Canadian update

Paediatrics & Child Health, Journal Year: 2014, Volume and Issue: unknown

Published: June 1, 2014

The present practice point provides updated guidance on personal protective measures to safely and effectively prevent mosquito tick bites in Canada. Means of avoidance as well physical chemical barriers are described. Current information regarding insect repellents recommendations for their use provided, along with instructions removing ticks. Guidance using insecticide additional protection is offered.

Language: Английский