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Informed Discussion of Beekeeping Issues and Bee Biology

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Subject:
From:
Peter L Borst <[log in to unmask]>
Reply To:
Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:
Sun, 14 Mar 2010 09:42:40 -0400
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GREEN-ISH PESTICIDES BEE-DEVIL HONEY MAKERS
Janet Raloff 
www.sciencenews.org/
 
> Pesticides are agents designed to rid targeted portions of the human environment of undesirable critters – such as boll weevils, roaches or carpenter ants. They’re not supposed to harm beneficials. Like bees. Yet a new study from China finds that two widely used pyrethroid pesticides – chemicals that are rather "green" as bug killers go – can significantly impair the pollinators’ reproduction.

> Compared to queens receiving clean sugar water, those in the pyrethroid groups were substantially less fecund. For instance, clean queens in 2006 laid a little more than 1,200 eggs each day, compared to not quite 900 a day in the bifenthrin group and roughly 600 per day in the deltamethrin group.

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