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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI have two standard hollies in pots. One has started to develop a black sooty deposit on some of its leaves which easily wipes off. No insect pests are visible. Is this likely to be terminal?
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[1] https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
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1 Comment To "Black Deposit on Holly"
#1 Comment By Nikki On 03/14/2014 @ 11:12 am
It sounds like sooty mold, which is a symptom of several kinds of pests that can attack hollies. I recommend treating the plants with neem oil. This will kill any pests on the plant and treat the sooty mold as well. This article will help: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm [1]