 Consider covering your young squash plants with a row cover to physically exclude the squash bugs. But remember to eventually remove that row cover to allow for pollination. If populations become really bad, consider using insecticides with active ingredients like pyrethrins, zeta cypherins, and permethrins. Remember, there are some lookalike insects like the brown marmorated stink bug, other brown stink bugs, kitzing bugs, and the leaf-footed bugs.