1921 ENTOMOLOGICAL SOCIETY. 



Cabbage Root Maggot. I do not know when I can recall a season when 

 so much damage was clone to cabbage, cauliflower, radish and turnip, by the 

 various root maggots. Practically all local early crops of the above vegetables 

 were ruined. Although corrosive sublimate was recommended, I do not know 

 of anyone who tried it. 



Cutworms were not frequently mentioned as injurious this year, except 

 in old sod. The poisoned bran mixture for the surface-feeding species is so well 

 known that reports of injury are less numerous than formerly. 



Seed Corn Maggot. This is the first time that I have seen any injury by 

 this pest in Western Ontario. The injury was slight, generally speaking, although 

 it was necessary to replant several corn fields in Harwich Twp., Kent Co. Part 

 of this injury was also due to an unidentified species of elaterid. 



Cabbage Worm. Unusually destructive this year, but easily controlled by 

 using pyrethrum powder. 



Parsnip Webworm {Depressaria lieracliana). A pest of considerable eco- 

 nomic importance when seed is required. Very abundant this year. 



Warble Fly (Ilypoderma bovis). Undoubtedly this noxious cattle pest 

 is increasing in numbers, and is causing cattle graziers some alarm. Some 

 thirty-eight warbles were extracted from the backs of cattle this summer, but 

 we were unable to secure the adult fly. In contradistinction^ to general! belief 

 that the warbles emerge in early summer, they were still present in small numbers 

 in the cattle in early August. 



INSECTS OF THE SEASON IN ONTARIO. 



I. Caesar, O. A. C, Guelph, and W. A. Ross, Dominion Entomological 



Laboratory, Vineland Station, Ont. 



Orchard Insects. 



The Codling Moth (Cydia pomonella) . This insect was not nearly so abun- 

 dant as last year. Low temperatures in June and July caused the adults to 

 appear late, and this, together with the general lower summer temperature, 

 resulted in there being practically only one brood even, in the warmer parts of 

 the province. The large percentage of dead young larvae found in apples in 

 early July would indicate that disease also may have played a considerable part 

 in lessening the amount of injury. In most sections the percentage of "side- 

 worm'' injury in sprayed orchards was small. 



The San Jose Scale (Aspidiotus perniciosus) . This well-known pest con- 

 tinues to increase in unsprayecl and poorly spra}'ed orchards. It is worth while 

 noting that in some localities it is being parasitized to an appreciable extent 

 by chalcids. 



The Oyster-shell Scale (Lepidosaphes ulmi). There has been a marked 

 increase of this scale insect in many orchards during the past two or three years. 



The Fruit Tree Leaf-roller (Tortrix argyrospila) . This insect is coming 

 into prominence in the vicinity of Newcastle, where from ten to twenty per cent, 

 of the apples in several orchards were injured by it this year. On the otlier hand, 

 in the Simcoe district, where it used to be so troublesome, it has almost dis- 

 appeared. 



The Green Apple Bug (Lygus communis). This species has been found 

 in the Newcastle district in two orchards attacking apples and pears, and doing 

 considerable damage, especially to pears. 



