Q & A

Welcome to the Planet Natural Garden Forum! Whether you’re new to gardening or have been at it for some time, here you can search existing messages for answers to your questions or post a new message for others to reply to. If this is your first visit, please read over our forum instructions carefully before posting. Enjoy!

#207893 Reply

E. Vinje
Keymaster

Hi Melanie –

Bacillus thuringiensis var. kurstaki or Bt-k will work on Squash Vine Borers but it must be injected or sprayed into the stem holes. In fact, studies have shown that Bt — an organic insecticide — was just as effective as chemical treatments. Here’s a link that should help:

Keep in mind that Bt is not approved by the EPA for vine borer control and will not show up on the product label.

Good luck!