Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on November 27, 2011
If it's caused by a fungus, then neem oil should help. In addition to being an effective insecticide, it's also a great fungicide. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
Was this answer useful?
00