DE should work on any insect that has a carapace (shell). It works under the shell, punctures and dehydrates them.

But it does take about three days to kill them, so keep picking and drowning the ones you see, and hope the DE gets the others.

Sue

How do you plan on getting your squash bugs in direct contact with the DE?

I've been using a mixture of canola oil, liquid dish soap and water to spray my plants. It's gotten rid of the aphids and a the squash bugs it seems...although there weren't tons of them.

The DE worked for me, especially on the little baby squash bugs. Key is to pick as many adults as you can, pick eggs, dust the undersides of the leaves and bases of the plants. You have to dust again if it rains. I never saw any more bugs after I dusted the first time and got rid of the first bug. There were a few babies with the first small adult, then, nada! Last year, bazillions!

Well I picked all the adults I could.......After I put the DE directly on the plant, I only see a couple of adults a day. The plant is going on and producing again :) I put the DE at the base and leaves and only applied it one time, but I am keeping a close watch.