Mines on Hybrid Black Poplar
More of these Ectoedemia mines have been found - this time in Norfolk by Andy Musgrove.
Tips on rearing miners such as this are given by John Langmaid who says:
'Maitland Emmet's recommended way of breeding
Ectoedemia species is to put some earth into a flower pot, cover it with
some sphagnum and then lay the leaves on top. Cover the whole thing with
cling-film till the larvae have left the mines and then remove the leaves.
Semi-sink the flower pot in the garden for the winter, cover with muslin or
nylon and cover half the pot with polythene to reduce the amount of rain
getting into the pot. Remember to put some sort of label or colour-coded
daub onto the pot and have a notebook saying what the leaves are and where
and when collected. It is very easy to forget which pot contains what!'
Image:© Andy Musgrove
Paul Sokoloff has his theory for Green Islands:
'You can artificially induce green islands by
applying synthetic plant hormones, fungal and yeast extracts to a leaf
surface before the abscision layer forms, but I am not convinced that the
presence of the larva mimics these effects (whether mediated by cytokinins
or other substances). One strange observation is that green islands
develop even when the larva dies in an early instar.
Image:© Ian Thirlwell
Many miners make Green islands at this time of year
and these (above) are mines of Stigmella tityrella on Beech (Fagus),
collected by John Langmaid.
Some excellent pictures from Mark Lawlor of this new British miner - thanks to Peter Costen for arranging these. How long before it is discovered on the British Mainland?
Image:© Mark Lawlor
Image:© Mark Lawlor
New Leaf miner team member:
We are very pleased to announce that Colin Plant has become the latest member of the leaf miner team. Colin will be known to many of you as Editor of The Entomologists Record and we welcome his expertise on the team. He will also act as a regional consultant on the team. Colin is always, of course, pleased to hear from you with leaf mining news such as new county and vice county records, new identification tips etc. which may be suitable for publication.
|Newsletter of leafmines.co.uk November 2003||November 2003|