wad25's picture

Holly Leaf Miner

Observed: 19th September 2011 By: wad25
S159 Neighbourhood Nature - course complete
wad25’s reputation in Invertebrateswad25’s reputation in Invertebrateswad25’s reputation in Invertebrates
Holly Leaf Miner (1)
Holly Leaf Miner (1) 1
Holly Leaf Miner (1) 1 2
Holly Leaf Miner (1) 1 2 3
Description:

Cream/Reddish Brown damage to holly leaves caused by burrowing larvae of the fly Phytomyza ilicis.
Do the brown areas indicate the presence of the larvae?

Identifications
Species interactions

No interactions present.

Species with which Holly Leaf Gall Fly (Phytomyza ilicis) interacts

Comments

RHoman's picture

Phenology

According to

http://www.bladmineerders.nl/minersf/dipteramin/phytomyza/ilicis/ilicis.htm

larvae occur in the blotch mines between December and May. So in this case, the larvae will not be present in the mines shown, but there could be a new generation of larvae in their early stages when the mine is confined to the midrib of a leaf. To check if a new generation is present, then look for the scars on the underside of the midrib, where the female has laid her eggs.

Robert Homan

wad25's picture

Phenology

Thank you for your response, I will take a closer look as you suggest.