Hello my fellow grower. You got u some Aphids. They come in different colors. They deposit some varnish like substance that gray and black mold grow from .Clean good ,Aphids,spider mites and mold spores hitchhike on your clothes.There is beneficial 🐝 insects midges pirate bug,but it to late for that.There is beneficial fungi but to late for that.I would say a light Neem,or hot pepper 🌶️ spray.Chili peppers have capsaicin,a compound that makes them hot. We humans like the hotness but Animals, insects not so much.You could buy but you could make yourself even add garlic