bacillus thuringiensis shelf life

Harold Lindaberry harlind at
Tue Jun 30 08:37:07 EST 1998

vince wrote:

> 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.

Harold Lindaberry
visit OXGORE website at

More information about the Microbio mailing list