. Injurious insects : how to recognize and control them . Insect pests; Insect pests. Fig. 92. — The Seed-corn Maggot. Enlarged and natural size. Orig- inal. sprouts are pushing above the ground. A later generation works in similar fashion. The adult is a two-winged fly. The apphcation of carbohc acid emulsion is the only direct remedy available. Injmy is apt to be worse when manure has been ap- plied to the fields ia the spring, probably because it attracts the adult flies or offers them shelter. The Carrot Rust-fly (Psila roses Fab.) The leaves of the plants attacked turn red or rusty lookin
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. Fig. 92. — The Seed-corn Maggot. Enlarged and natural size. Orig- inal. sprouts are pushing above the ground. A later generation works in similar fashion. The adult is a two-winged fly. The apphcation of carbohc acid emulsion is the only direct remedy available. Injmy is apt to be worse when manure has been ap- plied to the fields ia the spring, probably because it attracts the adult flies or offers them shelter. The Carrot Rust-fly (Psila roses Fab.) The leaves of the plants attacked turn red or rusty looking, while the roots are tunneled bv small brown maggots, one fourth of an inch Fig. 93. — W ork of the Carrot Rust-fly. Original. On the surface the root may not show much of injur\-. but when it is cut tlirough. the brown burrows will be evident. Occa- sionaUy is attacked by the same species. The adult is a slender-bodied, two-winged fly. There is one genera- tion annually in the field, but breechng may at times go on in carrots in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
