1919 ENTOMOLOGICAL SOCIETY. 25 



Last year many parasites were present but this year there were very few 

 cases of parasitism seen. 



Strawberry "Weevil {Antlionomus signatus). This species was unusually 

 destructive in Halton County and in the Niagara district. In many strawberry 

 plantations, especially in those adjoining wood-lots, from 30 per cent, to 50 per 

 cent, of the crop was destroyed by this pest. 



In a strawberry plantation at Yineland the depredations of the weevil were 

 apparently completely checked by a heavy application of sulphur and arsenate 

 of lead dust (80 parts of sulphur, 10 parts arsenate of lead, 10 parts filler). 



Strawberry Leaf-roller {Ancylis comptana). At Burlingten on July 

 •;oth many strawberry leaves were found infested with this roller and numerous 

 moths could be seen flying over the plants late in the evening. All stages of 

 the insect— eggs, larvse, pupas and adults — were to be found at that date. Com- 

 paratively little injury was done. Growers say that the insect, although common 

 for years, has not caused much loss. 



Red Spider {Tetranychus himaculatus or T. tclarius). During the latter part 

 of July raspberry bushes in the Yineland district were seriously injured by 

 the red spider. 



Insects Injurious to Truck Crops. 



Cabbage Root-maggot (Cliovtopliila hrassicae). This pest has seldom been 

 more destructive to cabbage, cauliflower and radish than it was this year. Com- 

 plaints were received concerning it from all parts of the Province. In Carleton 

 County considerable loss was caused on some farms by the maggots attacking and 

 destroying young turnips. 



Onion Maggot {Eylemijia antiqua). This insect, though not so abundant 

 as the cabbage root-maggot, was present in considerable numbers in many localities. 



Seed Corn Maggot (C^iortopliila fusciceps). Not nearly so many complaints 

 of injury to beans from this maggot were received this year as last. Seed potatoes 

 in the vicinity of Brantford were badly attacked. A few complaints of injury 

 to beans, seed corn, and potatoes were received from other districts. 



Cabbage Worm (Poniia rapae). In the Niagara district this pest was 

 unusually abundant. 



Beet Leaf-miner (Chortophila vicina). Numerous mines caused by this 

 miner were seen at Guelph and Burlington on beets and a considerable number 

 on mangels. On July 2nd many eggs were to be seen on the under surface of the 

 leaves. Nearly all these eggs or the maggots from them must have perished, for 

 very few mines were observed after that date. 



Parsnip Webworm (Depressaria heracliana). This species was decidedly 

 destructive to the parsnip seed crop in parts of Western Ontario, and at Guelph 

 and Yineland. 



Carrot Rust Ely (Psila rosae). Specimens of carrots injured by this fly 

 were received from Guelph, Fergus, Toronto, Shelburne, St. Mary's and Listowel. 



Cutworms : Com and garden crops suffered to a considerable extent from 

 cutworm injurj'. 



Insects Injurious to Eield Crops. 



For the most part, field crops were injured very little by insects. 

 Wheat Insects. The Wheat Midge (Thecodiplosis mosellana Gehin) which 

 caused so much alarm in 1917 was not at all abundant this year. In rearing 



