458 Report of the Hoeticultueist of the 



former reconimendiition is not always practical, and whether the 

 latter course will do any good has not been definitely determined. 



QUINCE INSECTS. 



boeer. 



These are the same as those described imder 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. Bui. 148. 



