Neem oil and spinosad! Both are organic and will knock them little pests OUT! Deader than dead and for a few weeks. The neem oil even smells good like orange juice. I use a brand called Captian Jacks dead bug! For potato bugs I love this stuff because it works sooo good! And mixing in some Neem oil makes it stick!and last a touch longer by sheltering the spinosad from the suns uv that cuts back on its effectiveness over time.
What's the ratio between the two. I was looking at some Captain Jacks products the other day for blight...it had good reviews.