little grayish black bugs in all of my potted plants. please help
i have about 15 pots on my back porch, each with some sort of tree in them, nothing really that well developed, just beginner stuff. and almost all of the pots are infested with tiny little grayish black bugs, too small to see any real details, i have "Garden Safe House Plant and Garden Insect Killer" spray that i use but it doesn't seem to phase them. i have heard to let the soil dry out but when i do my plants obviously suffer and the bugs are still there. is there anyone that has had this problem or who knows what these little black bugs are? i know they cant be good, and they are annoying and i think they bite. how do i get rid of them? and keep them away? because if they ever seem to go away, as soon as i water my plants they come right back. this can't be a climate thing either, when i lived in Utah i had the same problem, but here in Mississippi its probably even easier for them to survive because its so humid. its so annoying, and i think they are killing my apple trees and my avocado. Someone Please Help!!!!