. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1917 ENTOMOLOGICAL SOCIETY 123 Although considerable biological data have been gathered in the course of this work, only the control experiments and their results wil be discussed here. Since the publication of Schoene's Avork in Bulletin 2HG of the New York Experiment Station, at Geneva, very little has been done in reference to this insect. As the result of his work he recommended the use of Bordeaux mixture containing an arsenical. This spray should be applied during late July in' order to destr
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1917 ENTOMOLOGICAL SOCIETY 123 Although considerable biological data have been gathered in the course of this work, only the control experiments and their results wil be discussed here. Since the publication of Schoene's Avork in Bulletin 2HG of the New York Experiment Station, at Geneva, very little has been done in reference to this insect. As the result of his work he recommended the use of Bordeaux mixture containing an arsenical. This spray should be applied during late July in' order to destroy the adults which feed indiscriminately on the bark of the trees. Owing to the diffi- culty of spraying nursery trees this recommendation has not been adopted, and I know of no experiments which have been conducted on a large scale in order to test the efficiency of this method. To present the method of experimentation more clearly a brief synopsis of the life cycle of C. lapathi Linn, is necessary. The egg^ are deposited in August, September and October in two or ihree-year-old stock in the nursery rows. I did not succeed in finding eggs in younger stock. The cgg^ are laid exclusively in the corky portions of the tree, just below the ; of the bark near the cambium. 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 Entomological Society of Ontario; Ontario. Dept. of Agriculture. Toronto, The Society
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsectp, bookyear1872
