Re: systemics
- Subject: Re: [sibrob] systemics
- From: J* I* J* <j*@usjoneses.com>
- Date: Fri, 18 Jun 2004 22:47:56 -0700
Not to be argumentative, but I believe that it was really the tracheal
mite that caused the devastation of the bee colonies. That is not to
say that varroa mites at not a problem, but it was the addition of the
tracheal mite that triggered the loss of so many colonies.
John
On Jun 18, 2004, at 8:50 PM, Bob Hollingworth wrote:
> Generally systemic insecticides are considered to be reasonably safe to
> pollinators since they don't get excessive exposure via the pollen or
> nectar, but Merit may be a bit different. The active ingredient
> (imidacloprid) has two actions. One, at higher doses, is lethal to
> insects.
> At lower doses it can affect behavior without directly killing the
> insect,
> such as stopping aphids from feeding. It is the behavioral effects
> that are
> of concern regarding bees since it is claimed that imidacloprid can
> disrupt
> foraging activities.-- in fact some of it's uses were banned in France
> because of complaints from beekeepers. Bayer (who make it) deny these
> claims based on what seems like good research, and there haven't been
> many
> complaints about its impact on bees in the US as far as I know. This
> is all
> complicated by the fact that bee populations in the US have been
> decimated
> by Varroa mites, and if colonies do decline, it could well be mites
> that
> are causing it. So, as usual, the situation is murky, and it depends
> who
> you believe. There are some interesting websites on this if anyone is
> interested in digging deeper. I have a couple of research projects at
> the
> moment on this compound and its effects on insects, so the area is of
> some
> interest to me and all of this may be more than you wanted to know!.
> Bob
> Hollingworth.
>
> At 11:11 AM 6/18/2004, you wrote:
>
>> The question of systemics and pollen is whether the pesticide
>> translocates
>> to the pollen and if the beneficial pollen eaters are then effected.
>>
>> Harold Peters
>> Beautiful View Iris Garden
>> 2048 Hickok Road
>> El Dorado Hills, CA 95762
>> harold@directcon.net <h*@directcon.net>
>> www.beautiful-view-iris.com
>>
>>
>> -----Original Message-----
>> From: Debora Totoonchie [T*@jps.net]
>> Sent: Friday, June 18, 2004 6:44 AM
>> To: sibrob@yahoogroups.com
>> Subject: [sibrob] systemics
>>
>>
>> HI Margaret,
>>
>> It is my understanding that systemic only affect chewing insects as
>> they
>> have to ingest it. The flyers and pollinators are safe.
>>
>> I am receiving this information from the manufacturers at Monterey
>> who make
>> products for EB stone, Master Nursery as well as their own label.
>>
>> If anyone knows different please let me know so I am giving the
>> correct info
>> to my customers.
>>
>> Debby Totoonchie, zone 7 Sierra Foothills CA.
>>
>> " Anyone can hold the helm when the sea is calm"
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>>
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John | "There be dragons here"
| Annotation used by ancient cartographers
| to indicate the edge of the known world.
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