Is there any way to treat infected pepper plants? I'm not sure if it is a viral or a bacterial infection, but there are tiny black spots on the undersides of the leaves before they turn yellow. Then they wilt, turn black, and drop off. At first, I saw some aphids, so I sprayed with a white oil spray a few times, then with an insecticidal soap spray. I thought the plants seemed to be doing better, so I discontinued the sprays, but symptoms are now reappearing. I have already pulled up most of my pepper plants, but I am hoping to salvage 2 or 3. I need to know if the sprays I have been using help or hurt, and if the problem is disease rather than bugs? What other treatments are available?
Diseased Pepper Plants
Certified GKH Gardening Expert
Neem oil is effective on most insect pests and is also a good fungicide. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
This article will help determine what the issue is affecting your plants: https://www.gardeningknowhow.com/edible/vegetables/pepper/common-pepper-plant-problems.htm