Aspen Serpentine leafminer

6240 On June 4, 2018 I noticed several leaves on this poplar tree looking as though they had a silver sheen. On closer examination, the silver sheen looked like an intricate maze on each leaf ending with a small spot that might be an egg. About 10-15% of the leaves may be infected. It is only about 3-4 weeks since the leaves matured. From Canmore, AB

Number 6240 – This appears to be the work of the Aspen serpentine leafminer, Phyllocnistis populiella (Lepidoptera: Gracillariidae). Click here for more detailed information