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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI have a potted rhododendron. It was healthy but some leaves have now started to shrivel and on the upper area of the leaf there is what looks like a sprinkling of fine sawdust. The leaves affected are starting to shrivel at the edges, but the rest of the plant looks healthy.
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[1] https://www.gardeningknowhow.com/plant-problems/pests/insects/mealybugs-control.htm: https://www.gardeningknowhow.com/plant-problems/pests/insects/mealybugs-control.htm
[2] https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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1 Comment To "Rhododendron bush disease?"
#1 Comment By Heather On 06/21/2015 @ 5:54 pm
Looks like you have mealybugs. You can treat the plant with a pesticide to get rid of them. I personally like neem oil as it is organic and beneficial bug safe.
Here is some information that might help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/mealybugs-control.htm [1]
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm [2]