bacillus thuringiensis shelf life
harlind at epix.net
Tue Jun 30 08:37:07 EST 1998
> 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.
> > Thanks,
> > Dan Jones
> BT insecticide has a shelf life of maybe two years if its kept in a cool
> dry place, especially dry. Try using sevin garden dust, it's safe and
> natural too.
IMO a better choice and just as safe but I think you will find some might
question the "ALL NATURAL" status.
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