80 THE ORCHID REVIEW. [MaRCH, Ig1t. 
THE CATTLEYA. ELY. 
A PARTICULARLY bad outbreak of the Cattleya Fly has just been reported 
tous. A correspondent who has only been growing Orchids for two years, and 
has now about 300 plants, wrote a few days ago :—“ Kindly let me know at 
the éarliest moment what is attacking the new growths of my Cattleyas. 
Am I right in assuming it is the Cattleya Fly? If so, what is the remedy ? 
I had no trace of it until this year, but now, unfortunately, nearly all my 
plants are affected. I enclose a couple of the young growths.” On cutting 
these we found not only the grubs but some mature flies, and we wrote 
immediately advising the removal of every deformed growth, and fumigation 
if any flies had escaped, as the only remedy was to’ prevent more eggs 
being laid. A reply quickly came :—‘‘I find all my plants are affected, and 
I have cut off about 150 new growths, which are full of either grubs or flies. 
Fig.9. THE CATTLEYA FLy (nat: size and magnified). 
I am afraid some of the flies have hatched out and escaped into the house. 
I have fumigated three times since receiving your letter. The insects seem 
to keep in the fibre in the pots, and do not fly freely in the house, hence I 
am afraid fumigation does not have the full effect.” He also asks whether 
any substance can be applied to the compost that will kill the flies without 
injuring the roots, and if the fly attacks other Orchids, as Dendrobiums, 
growing in the same house. We shall be glad if our readers will give us the 
benefit of their experience on these points. We should-also like to know 
more of the life history of the pest, and how many broods there are in the 
year. An account of another bad outbreak was 
our eighth volume, with a figure magnified ten. di 
under natural size, which are here repeated. 
given at pp. 241, 242 of 
ameters-and another just 
