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Posted by Bob (U14948450) on Monday, 1st August 2011
Please help. My cue plants are producing but the leaves have or becoming covered in white spots, which gradually encompassess the whole leaf. The leaf also becomes "scratchy" and white dust can be shaken off. What is wrong !
I have the same problem and would also like to know what to do mine are in a greenhouse watered regularly.
thanks
wendy
Sounds like it could be powdery mildew. It's very common. This link might or might not confirm it:
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