458 Report oF THE HORTICULTURIST OF THE 
former recommendation is not always practical, and whether the 
latter course will do any good has not been definitely determined. 
QUINCE INSECTS. 
BORER. 
These are the same as those described under apple insects, 
page 406. The trunks of the trees should be examined carefully 
in spring and fall and the borers dug out. Various other remedies 
have been advocated, but apparently none of them take the place 
of systematically removing the grubs. 
CODLING MOTH. 
(Carpocapsa pomonella Linn.) 
This insect is the same as that which causes wormy apples and 
pears as described on page 412. It should be treated by spraying 
with Paris green or some other arsenical poison as soon as the 
fruit sets, followed by one or two later applications at intervals 
of ten days, or even less if heavy rains fall in the meantime. The 
poison thus used is also recommended for the curculio mentioned 
below. It may be combined with Bordeaux mixture when that 
is used against fruit spot and leaf blight, using one pound for 
one hundred and fifty gallons. 
CURCULIO. 
(Conotrachelus crataegi Walsh.) 
Description.— The adult insect is somewhat larger than the 
plum curculio. It is broader just back of the thorax and is a 
brownish gray color mottled with white. Its life history as 
worked out by Slingerland® is substantially as follows: The 
winter is passed in the grub stage in an earthen cell two or three 
inches below the surface of the ground. Here the transformation 
to the pupa takes place in the spring. The time when the adults 

49 Cornell Univ. Agr. Exp, Sta. Bul. 148. 
a ee 
 — 
