Date: Mon, 11 Aug 1997 19:24:28 -0800 From: Ron Schlosser <rons@earthworld.com> To: cp@opus.hpl.hp.com Message-Id: <aabcdefg3060$foo@default> Subject: Re: Pesticide labelling, etc. (was: cephalotus and scale)
On 11-Aug-97, Carl Gustafson wrote:
>On Friday (8/8/97), Ron Schlosser wrote:
>> I have worked for the past 23 years in the horticultural field, most of
>>the time dealing with pesticides. A year ago my current employer required
me
>>to obtain a Pesticide Consultants license and I have learned what can and
can
>>not be recommended about the usage of pesticides. First, *the label is the
>>law* which means, if I remember right, that if the *plant* is not listed on
>>the label the product *can not be used on that plant*. Second, if the plant
>>*is* listed but not the pest and you have reason to think that the pesticide
>>will control the pest your after you can use it. There are product labels
>>that do allow for one to treat plants that are similar to ones on the label
>>but are not specified.
>Would CP be included in "Ornamentals?" Since many pesticides list use on
>ornamentals, and CP certainly aren't kept as food or crop plants (at least
>not by me) they might conceivably be considered ornamental.
Yes, CP are considered ornamentals not ag. The dividing line between the 2
sometimes over laps, you could have what they call an edible landscape with
things like blueberries as part of your landscape. In general, if you can
_safely_ eat parts of the plant, you'll need to apply products that are
labeled for food crops, otherwise use the ornamental formulation.
>> Now about Dimethoate. This product is a *powerful* systemic. It is a
>>*true* systemic in that it is moved by the plant to all parts of the plant
>>regardless of where it contacts. Orthene on the other hand is a local
>>systemic, it is absorbed by the plant but does not translocate. If one uses
>>this product, you should use a pesticide respirator that is labeled for
>>pesticides, if you don't it can make you *real* sick if you breath the
fumes.
>>There are 2 labels for the product, one for agricultural use (vegetables
>etc.)
>>and the other is for ornamentals. I would suggest that if one wants to try
>>this product out that you start with the lowest rate on the label which
works
>>out to be 1 tsp (5 ml) per gallon and spray to wet. I have had no problem
>>using this product on my Sarracenias or Darlingtonia but Drosera do not like
>>it. I'd never drench.
>I can second it's agressive nature. I believe that a small amount of wind
>drift caused blistering (chemical burns) that took several weeks to heal.
>When using this stuff, I always wear neoprene gloves, and an mask fitted
>with cartridges for organic vapor, not one of those brassiere-cup type jobs
>sold for dusts.
You are using the correct respirator, anything else would be unsafe. I
have seen a label for Dimethoate that mentioned for 1 tree (I believe it was a
Birch tree) that you could use a paint brush and paint a band around the tree
with the concentrate and it would be absorbed and translocated.
On another note, I have heard about a new systemic product that is due out
RSN that is supposed to be selective for aphids. I'll be interested to see
that product and find out the costs.
>Carl
> G.
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