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Posted by Chris_Harper2 on November 17, 2002 at 12:48:16:
In Reply to: Black Knight posted by HornedFrogGuy on November 13, 2002 at 19:54:38:
There is some anecdotal evidence suggesting that permethrin (active ingredient in Black Night) may cause neurological-type symptoms in some species of snakes. These effects may be amplied in juveniles.
Here is mine:
I've used permethrin much more conservatively than recommended and had specimens exhibit "seizure-like" symptoms. These inlcluded juveniles of Spalerosphis and Porthidium. One of the Spalerosophis did die. The rest of the animals recovered and were still alive over a year later. I treated about 30 animals at the same time and used the same protocol. The only dosage variation would have come from different amounts of material being discharged from the spray bottle. Regardless, the spray time was much, much less than that recommended. Multiple specimens of Atropoides, Calloselasma, and Cerastes exhibited none of the symptoms.
I also used permethrin incorrectly once and had an adult male Tropidoleamus die. This latter case was completly my fault. I sprayed down a plastic cage as per recommendations and allowed the product to dry. A few days later I misted the cage with water and left the animal to drink. I came back later to find the animal with his mouth completely gaped and he remained in that position for at least another half and hour even though he was removed immediately.
The matrices of plastic probably had quite a bit of residual ingredient left and likely went into solution when I misted the cage with water.
I did treat a second male Tropidolaemus by quickly spraying the OUTSIDE of a snake bag. I then put the animal INSIDE of the bag for one hour.
He is still alive and doing fine.
