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Date: | Thu, 11 Oct 2012 06:30:28 -0600 |
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I came across this snip from an Eric Mussen newsletter from last spring
again and thought it worth repeating. The mention regarding Tactik was
most interesting IMO.
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1.) ...it is interesting to note what Zachary Huang's lab discovered
(ABJ abstract #14) about feeding fumagillin to honey bees to control
Nosema ceranae. In their studies, they found that the antibiotic impacts
both the parasite and the protein makeup of the honey bee intestinal
tract. In fact, as the level of fumagillin decreases in the bees over
time, it reaches a low level which actually stimulates spore production
of N. ceranae. A similar effect is seen with N. apis, but it is not
nearly so pronounced._It could be that the low levels of fumagillin may
be suppressing the honey bee immune system. The use of fumagillin as a
last resort cancer treatment in mammals severely impairs their immune
system. _
2.) Chris Mullin and his cooperators at Penn State University (ABJ
Abstract #20) have been reverse-engineering some pesticide formulations
and testing some of the common "inert ingredients" for honey bee
toxicity. N-methylpyr-rolidone (NMP) was the first to be emphasized. The
researchers found that NMP is toxic to honey bees, especially so for
brood. With a bit of NMP in the commercial formulations, Bravo® was four
times as toxic to brood as the active ingredient chlorothalonil is by
itself. _Tactik®also was four times as toxic to brood as was straight
Amitraz._ As I mentioned earlier, it is going to be very difficult to
try to regulate pesticides based on potential danger to bees when so
many inert ingredients and adjuvants are complicating the picture.
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