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Subject:	Re: Jigsaw pieces
From:	Peter L Borst <[log in to unmask]>
Reply To:	Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:	Wed, 14 Apr 2010 08:12:52 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (14 lines)

Norman Carreck writes

> Ascribing a definitive cause to losses has also been made much more difficult because of differing pathogen virulence and different host susceptibility in different regions, and different methods used by scientists in previous surveys and experiments. Thus, efforts by individual countries to reveal the drivers of colony losses are probably doomed. 

> Sober reassessment of the Isle of Wight Disease many years later (Bailey and Ball, 1991; Bailey, 2002) led to the conclusion that the disease had been due to a combination of factors, in particular, infection by chronic bee paralysis virus (completely unknown at the time), together with poor weather which inhibited foraging, and an excess of bee colonies being kept for the amount of forage available.

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