166 



THE RBPOKT OF THE 



No. 36 



Where the larvae were very abundant they did a great deal of damage both 

 to the foliage and the fruit. Large numbers of the terminal leaves in such cases, 

 especially on the top of the tree, were badly tattered and riddled by them, but 

 none of the trees were defoliated as had happened in some cases in Colo la do 

 and elsewhere. In the orchard at Simcoe there was so light a setting of fruit 

 on most of the Spy trees this year that it was difficult to form any estimate 

 of the amount of loss. On one well-laden tree, however, of another variety in 

 among the Spy trees fully 50 per cent, of the fruit was ruined either by the 

 destruction ot the fruit blossoms or by the killing of the young fruits themselves 

 or by rendering much of what remained culls. In an orchard near Hamilton I 

 estimated that some large Greening trees had fully 50 per cent, of the crop des- 

 troyed. Mr. Sexsmith of Trenton estimated that in his ten or twelve acre orchard 

 the crop had been lessened fully 50 per cent, in the infested orchard both last 

 year and this. Another orcha-rd of his, and all the neighboring orchards visited 

 by me, had suffered almost no injury. In Norfolk County we found only the one 

 orchard at all seriously infested, though a few larvae were to be found all through 

 the district. 



Egg masses of A. argyrospila. The four to the right have hatched, 

 and are white; the remainder are iinhatched and are 

 dark brown. (Natural size.) 



An examination of the only three badly infested orchards known to me showed 

 that any variety of apple was subject to attack and that there was no reason to 

 believe that there was any special attractiveness in the Spy over other varieties. 



Beief Desceiptioxs of the Adults of Each Species. 



The adult of the Fruit-tree Leaf-roller is a moth with a wing expanse of 

 from two-thirds of an inch to one inch. The general colour of the fore wings is a 

 rusty brown with several silvery-white or silvery-gray markings which vary some- 

 what in different individuals, but are usually of the size and arrangement shown in 

 the photograph. The hind wings are a light ashy brown color Avithout any 

 markings. 



