Rhododendron Plants

Can you identify this diease or pest & what is cure?

Zone North West England | wycani added on June 29, 2014 | Answered

Rhododendrons leave are covered in black sooty deposits, and the underside of leaf has white strips mainly down the spine of the leaf. The actual Rhodies are 50+ years old.

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Answered on June 29, 2014
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