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england, United Kingdom Gb

hi please can anyone tell me what this black stuff is on my rotadendrum leaves many thanks



Dscf2653

Answers

 

looks like sooty mould. You probably have had greenfly on the shrub and they exude a sticky substance called honeydew. this then allows a mould to grow. There is commercil sprays availabe to cope with this.

14 Nov, 2010

 

I agree, it looks like sooty mould from either aphid of scale insect. Treat the insect and the sooty mould loses its food source and will wash off.

15 Nov, 2010

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