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.
