Here's a couple of photos of what I've been calling Leveillula taurica, and some comments:
Photo 1 - two leaves from the same plant - the leaf on the left looks how I think of something systemic might possibly look - maybe V on this one, except the leaf on the right shows necrotic spots surrounded by yellow margins - maybe L.T. on this one.
Photo 2 - detail of the necrotic spots from the right leaf in photo 1.
Photo 3 - typical symptoms on two leafs from a PL plant. Again, I see possibilities of both L.T. and V.
I removed a lot of yellow leafs today - the leafs in the worst condition were, as Naysen also noted with his, inside the canopy where preventative sprays didn't reach and humidity is probably higher. This seems to indicate L.T. - I don't see how V. symptoms could be affected by canopy location.
Ivan, is L.T. identification something easily accomplished with a microscope and a few spare minutes in the evening, or would it require in-depth knowledge of fungi and more than a few hours of reading?
Thanks,
Steve
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