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ARE THESE MITE GALLS ON ALEXANDERS?
Observed: 12th March 2012 By: Lucy Corrander
Added: 12th March 2012
Hollow raised bits on the leaves of Alexanders, lighter than the rest of the leaf and dotted with bright yellow . . . looks like pollen or butterfly eggs but is neither. The raised areas with yellow are almost all on the tops of the leaves and with the hollows on the backs - and nothing to be seen inside any of them. Nearly all are rounded but some are long and a bit more solid (as shown). The plants seem healthy.