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RE: Glyphosate and pets



The LD50 is an indication of acute toxicity, not long term.
I elect to minimize exposure all possible.
Clark

>
>OK this is an easy one
>
>Glyphosate has an LD 50 (lethal dose 50%, ie the amount  an individual
>would need to consume per kilo of body weight and have a 50% chance of
>surviving) of 4300 mg per kg.  (4.3 grams per 1000 grams)
>This figure is reached by testing on lab rats and is a standard measure
>used for ranking any substance that may be regulated in its use or
>application.
>
>Now this may not sound like much but remember that Caffeine has an LD50
>of 150 mg/kg
>and aspirin has an LD 50 of 750 mg/kg and good old common salt is 3000
>mg/kg!
>
>Put another way, if Glyphosate was applied a rate of one litre per
>Hectare which is a fairly common rate of use then there is an film of
>active ingredient over that area equivalent to either 380 grams  per
>Hectare (yellow) or 420 grams per Hectare (blue) , depending on the
>strength of the Glyphosate product you purchased. 
>
>A 5 kilogram dog would then need to eat or at least lick up 5 kg x 4.3
>grams = 21.5 grams of Glyphosate to get an even chance of dieing.  This
>equates to eating (or licking up) 565  square meters of treated surface
>at the lower level  or Glyphosate concentration. (0.038 grams of active
>per square meter treated)
>
>I know that dogs like to have the odd munch of grass very now and then
>and certainly enjoy rolling and sleeping on the best bits of the lawn
>:-) but your not spraying your lawn I would guess, and if your only spot
>treating and using neat (undiluted) herbicide the same principles still
>apply.
>
>Most herbicides registered these days have very low toxicity levels, on
>par or even lower than Glyphoste.
>Makers are aware that toxicity is an issue and many times don't even
>bother to try and register the more toxic herbicides that may turn up in
>their testing.
>
>INSECTICIDES  are a completely different issue, don't ever be fooled by
>advertising that says it is
>"a completely safe pesticide"  apart from a small range of dessicants
>based on silica crystals and diatomatous earth (Dryacide is the
>registered name I know) and some Fungal suspensions you can spray on
>caterpillers and insecticide that kills by disrupting the nervous system
>will effect any animal including people.  We all have the same basic
>nervous system design and its only the dose difference between what
>kills a fruit fly and what kills a person.
>
>You should be able to ask for the Material Saftey data sheets on any
>registered Pesticide, you certainly can in Australia, and any supplier
>that dosent have them should be able to direct you to a source, either
>the manufacturer or the local Health Department.
>
>I know I have been a bit long winded but this is an important issue to
>many people and I am constantly seeing CHEMICALS being harranged in the
>press and by people who obvioulsy don't know what they are saying,
>remember you are 100% CHEMICALS.  Its the nature of the chemical that
>needs to be determined
>not the convenient label.  How often have you seen the headline
>"Chemical spill closes freeway...."
>Yet never any mention of what Chemical was actually involved, reporters
>should do their homework!
>
>Off my Soapbox  :-)
>
>Cheers, Rod
>
>Rod Randall
>Weed Risk Assessment
>Weed Science Group, Agriculture Western Australia
>Home Page  http://www.agric.wa.gov.au/progserv/plants/weeds/Weedsci.htm
>
>             "I weed..."
>
>> ----------
>> From: 	Marina & Anthony Green
>> Reply To: 	green@pangeanet.it
>> Sent: 	Tuesday, 6 January 1998 6:57 PM
>> To: 	medit-plants@ucdavis.edu
>> Subject: 	Glyphosate and pets
>> 
>> I bought some glyphosate after all of your immensely useful
>> recommendations, but the store-owner told me to keep any pets away for
>> at least 24 hours, and the Italian instructions looked fairly scary.
>> Before I start my marathon, I must ask what precautions other listers
>> have taken (or not taken and paid the price) with glyphosate and
>> pets?"
>> 
>> 
>> 
>
>
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