In an attempt
to elucidate the causes of poor colony health in general,
and CCD in particular, two longitudinal studies were initiated in
the spring of 2007.

The most commonly occurring pesticides were the
miticides coumaphos (detected in 100% of samples) and fluvalinate
(detected in 96% of samples) and the fungicide chlorothalonil.
Chlorothalonil was found in 100% of the samples of entombed pollen,
but only in 45.5% of samples of normal pollen

‘‘Entombed Pollen”: A new condition in honey bee colonies associated
with increased risk of colony mortality
Dennis vanEngelsdorp, et al --  Journal of Invertebrate Pathology 101
(2009) 147–149

* * *

Chlorothalonil is a foliar fungicide commonly used on turf
grass, fruits, and vegetables. Because of its high consumption,
chlorothalonil has been frequently detected in food and the
environment

Analysis of Chlorothalonil by Liquid Chromatography
ANALYTICAL SCIENCES MAY 2009, VOL. 25 693

* * *

Several growers were concerned about pollination.
They observed good bloom and presence of bees but
poor bee activity, in terms of actual visits to the flowers.

Growers reported using a rigorous fungicide schedule
due to the poor forecast. Many used the allowed three
applications of chlorothalonil fungicide.

Cranberry Station Newsletter
JANUARY 2008
http://www.umass.edu/cranberry

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