This recipe should kill the squash bugs, not just drive them off.
Ingredients
4Tspbaking sodaAnti fungal properties, also stops powdery mildew type problems
1Tspvegetable oilSmothering agent Neem oil would work well here. The amount could be doubled.
1Tsporganic soap Emulsifier/sticker/smothering agent Best to use a natural soap such as Dr. Bronner’s and not a detergent that can harm the soil organisms as it sticks around much longer. The peppermint variety seems to work well from Dr. Bronner's.
1 to 2Tbsgarlic juiceTo make juice: 1 medium bulb (not clove) of garlic blended with 1 to 2 cups of water. Let sit a minimum of 15 minutes and strain.
1medium onionMade into a juice concentrate as above.
1Tbsdried cayenne pepper.
Instructions
Add all ingredients together in a bottle with a screw top and shake well to mix.
Add concentrate to a gallon of water and spray liberally. Repeat as often as needed to drive off or kill the squash bugs.
Recipe Notes
Daily hand-picking seems to be very effective as well. Some of our readers use a battery powered vacuum to help with this chore!