move your plants from that area, generally move them to a cooler area if you are able. Dont use any bug sprays what so ever.. If they are hard and stuck on the plant then youve got scaly bug. If you do in fact have scaly bug, just set aside some time for yourself, and just scrape the bug off your plant. The best thing right now would be to give an accurate description of what everything looks like, or find a picture on the net that looks like your plant, or if you can, send a picture of your plant. Its not so easy to determine what kinda problem you have with the plant if all we get is.. I got black bugs on my plant. Theres always a way to get rid of them, just give us as much info as possible on the situation