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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI am familiar with the appearance of black spot, powdery mildew and most other diseases or pests we have had at one time or another on our bushes, but I am unable to find a picture of anything presenting like this…..It is only around the perimeter of each leaf on the bush. My best guess is black spot because some of the other leaves have black spot or Could it just be the remains of the leaves getting burnt in some severe heat we had earlier in the year here in Adelaide. I am trying to determine whether to treat in any way given that the bushes will soon be pruned.
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1 Comment To "Rose disease or pest and how to treat"
#1 Comment By Downtoearthdigs On 05/20/2019 @ 6:31 pm
Yes, I would continue to treat for Black Spot.
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