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Subject:	Re: Effects of neonicotinoids and fipronil on non-target invertebrates
From:	Peter Loring Borst <[log in to unmask]>
Reply To:	Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:	Tue, 28 Apr 2015 07:06:08 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (22 lines)

Hi all
Here is an interesting little insight. This article shows how long it takes for information to get to print, even in this digital age. (In fact, this isn't even in print yet).

Rundlöf, M., et al (2015). Seed coating with a neonicotinoid insecticide negatively affects wild bees. Nature. 00 MONTH 2015 | VOL 000 | NATURE. Received 11 July 2014, Accepted 26 March 2015, Published online 22 April 2015.

excerpts

We designed a study with eight pairs of landscapes surrounding 16 geographically separated (.4 km) spring-sown oilseed rape fields. One field in each pair was randomly assigned to be sown with seeds coated with the dose of Elado recommended by the manufacturer and a fungicide, while the other field in each pair, the control field, was sown with seeds coated only with the fungicide.

insecticide seed coating reduced the density of wild bees, that is, bumblebees and solitary bees, in the flowering oilseed rape fields and adjacent uncultivated field borders

insecticide seed coating was negatively related to colony growth and reproduction of the bumblebee B. terrestris.

insecticide seed treatment had no significant influence on honeybee colony strength. In contrast to the B. terrestris colonies, the A. mellifera colonies did not differ in strength (number of adult bees) between the treatments after placement at the oilseed rape fields. This finding is in line with another field study and previous work suggesting that honeybees are better at detoxifying after neonicotinoid exposure compared to bumblebees

We draw two main conclusions from our study. First, clothianidin seed coating in oilseed rape has negative effects on wild bees, with potential negative effects on populations. Second, the impact of clothianidin seed coating in oilseed rape differs between the wild bees studied and the honeybee.

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