Spiders are listed as controlled by Talstar flowable but not PL. They have the same % of and active ingredient. I guess this is cause spraying versus granular application. You would have more surfaces of plants and above that the spider walks on to kill them but when they walk on the ground treated by PL would they be killed also. Just wondering cause I only had PL on hand and did a perimeter treatment and the people were complaining of spiders. I told them if they were not gone in a few days call me and I will do another app at no cost.