36 



THE REPORT OF THE 



No. 36 



The Fall Canker Worm (Alsophila pometaria). The fall canker worm 

 is rapidly increasing in Halton and Wentworth counties. One orchard at Flam- 

 borough Centre was almost completely defoliated by it this year. The probability 

 is that many orchards will suffer considerably next year from its depredations. 



Apple leaves. On left showing whitening of leaf by sucking nymphs 

 of Rose Leaf-hopper: on right normal leaf. 

 Life size. 



The Rose Leaf Hopper (Empoa rosae). This species, which was so pre- 

 valent last year, was even more abundant this past season on apple trees through- 

 out the province. In many infested orchards practically all the foliage became 

 mottled and pallid, as a result of the feeding activities of the hopper and much 

 of the fruit, especially in the lower parts of the trees, became specked and dirty 

 with hopper excreta. Fortunately most of this excreta was washed off by rains 

 before picking time. 



The Rosy Apple Aphis (Aphis malifoliae). This plant louse was very in- 

 jurious in different parts of the province, and -in many orchards a large percentage 

 of the fruit, in the lower and inner parts of the trees, was dwarfed and deformed 

 by its depredations. 



Apple Maggot (Rhagoletis pomonella). By way of record it should be 

 mentioned that the apple maggot was found this year in Elgin and Huron — two 

 counties from which it had not been reported heretofore. 



(Hoplia TRiFASCTATAf). Stout scarabaeid beetles of the genus Hoplia, pro- 

 bably H. Irifasciala, occurred in destructive numbers both in 1919 and 1920 in 

 an orchard near Nottawa, Simcoe county. They attacked the blossoms of young 

 Duchess apple trees, and destroyed them almost as quickly as they 'Opened. 

 Wealthy blossoms were also attacked, but to a lessor extent. It seems probable 

 that the beetle came from the woods near by. This is the first time either writer 

 has seen injury from this insect in Ontario. 



