February, ’24] 
GIBSON: CACCECIA ROSANA 
51 
THE OCCURRENCE OF THE TORTRICID, CACCECIA 
ROSANA L., IN CANADA 
By Arthur Gibson, Ottawa, Ont. 
Abstract 
The tortricid, Cacoecia rosana L., was first recorded as a pest in eastern Canada 
in 1919, when it occurred in destructive numbers attacking particularly the foliage 
of bush fruits in the province of Nova Scotia. It was thought at the time that the 
species was new to science, and for this reason it was described by Busck as Cacoecia 
hewittana. Since 1919, the species has also been found in destructive numbers in 
the province of British Columbia. Notes on the egg and larval stages of the insect 
are included and also notes on parasites and artificial control. 
On July 10, 1919, I received from a correspondent living in Sydney, 
Nova Scotia, a supply of raspberry leaves infested with a tortricid 
larva, with the statement that the caterpillars were effecting noticeable 
injury, not only to the foliage of raspberry but to that of currant, 
hawthorne, lilac and sycamore, as well. Moths reared from this material 
were submitted to Mr. August Busck, of the United States National 
Museum, and at my request, as the species was thought to be unde¬ 
scribed, he named it Cacoecia hewittana 1 . Dr. McDunnough, in im¬ 
mediate charge of our National Collection of Insects, has, however, since 
informed me that the species is rosana of Linnaeus. I regret, therefore, 
for personal reasons, that the name hewittana must go into the synon- 
omy. Mr. Busck, I understand, now agrees with us in this. 
Cacoecia rosana L., has been known as a pest in North America for a 
number of years. Various references may be found in the literature, 
particularly by Messrs. Comstock and Slingerland, Lugger, Felt, 
Chittenden and Walden. In Canada, however, the infestation in 
Nova Scotia was the first I had record of, although since we have found 
in our collections specimens of the moth reared in Vancouver, B. C., 
in July, 1915, by Mr. R. N. Chrystal, who at that time was in our em¬ 
ploy. Conspicuous injury to the foliage of young oak trees was noted 
at the time. 
As indicated above, the larvas occurred abundantly at Sydney, N. S., 
in 1919, feeding on and webbing the leaves together in characteristic 
tortricid manner. Our correspondent informed us that the raspberry 
bushes had been similarly infested during 1917 and 1918. Comstock 
and Slingerland 2 and B. H. Walden 3 refer to the habit of the larva in 
feeding on the terminal leaves of the plants, drawing them together and 
Canadian Entomologist, LII, 125. 
Cornell Univ., Agr. Exp. Station, Bull. XXIII, 120. 
3 Conn. Exp. Station, Rep. 1912, 223. 
