bacillus thuringiensis shelf life
harlind at epix.net
Thu Jun 25 12:39:42 EST 1998
Bt is not a true biological agent in that it is an insecticide produced by a
bacteria and infection has little or nothing to do with the insect control. I is
fair on some leaf feeding ( chewing ) species others not effective. I expect
considering etiology and the feeding habits of squash borers I doubt that you
will have much success.
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Dan Jones wrote:
> We've been plagued with squash vine borers both this year and last, and I've
> been trying to exterminate them using "Safer Caterpillar Killer", a product
> containing bacillus thuringiensis (B.t.) var. kurstaki. I've tried both
> injecting it into the stems and spraying it onto the plants, and neither has
> been successful.
> What I'm wondering about is, since this is a biological agent, how long is
> it effective? The package has no expiration date on it. One mixes it with
> water before use. How long is it effective once mixed with water?
> Please reply by email as well.
> Dan Jones
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