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Subject:
From:
Peter Borst <[log in to unmask]>
Reply To:
Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:
Sat, 24 Jun 2017 19:26:01 -0400
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Not new, but recent:

Sixteen honey bee (Apis mellifera L.) colonies were placed in four different agricultural landscapes to study the
effects of agricultural landscape and exposure to pesticides on honey bee health. Colonies were located in three
different agricultural areas with varying levels of agricultural intensity (AG areas) and one nonagricultural area
(NAG area). Colonies were monitored for their performance and productivity for one year by measuring colony
weight changes, brood production, and colony thermoregulation. Palynological and chemical analyses were
conducted on the trapped pollen collected from each colony and location. Our results indicate that the landscape’s
composition significantly affected honey bee colony performance and development. Colony weight and
brood production were significantly greater in AG areas compared to the NAG area.

It was apparent that bees located in AG areas had access to
higher and more sustainable sources of nutrition than those of the
NAG area, and starvation losses were only observed in the NAG area.

Exposure to pesticides in colonies of the AG areas did not result
in measurable impacts on colony productivity. There may be other
effects not measured in this study, such as recent evidence that low
concentrations of neonicotinoids

In conclusion, honey bee colonies foraging in moderate and high
AG areas were clearly able to grow faster and to a larger size as a result
of better access to sustainable nutrition sources than bees foraging
in NAG area and a low AG area with urban activity.

Although negative effects of pesticide on colony health were not detected,
sublethal doses of insecticides and fungicides were identified in trapped pollen.

Alburaki, Mohamed, Sandra J. Steckel, Matthew T. Williams, John A. Skinner, David R. Tarpy, William G. Meikle, John Adamczyk, and Scott D. Stewart. "Agricultural Landscape and Pesticide Effects on Honey Bee (Hymenoptera: Apidae) Biological Traits." Journal of Economic Entomology 110, no. 3 (2017): 835-847.

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