. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN No. 278 Contribution from the Bureau of Entomology L. O. HOWARD, JfUW^-ft- Washington, D. C. PROFESSIONAL PAPER. October 5, 1915 MISCELLANEOUS INSECTICIDE By E. W. Scott and E. H. Siegler, Entomological Assistants, Deciduous-Fruit Insect Investigations. CONTENTS Introduction Experiments, 1912. Experiments, 1913. Field Summarized review. Conclusions Experiments, 1914 19 I Key to tables. INTRODUCTION. Numerous experiments with miscellaneous insecticides and spray combinatio
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN No. 278 Contribution from the Bureau of Entomology L. O. HOWARD, JfUW^-ft- Washington, D. C. PROFESSIONAL PAPER. October 5, 1915 MISCELLANEOUS INSECTICIDE By E. W. Scott and E. H. Siegler, Entomological Assistants, Deciduous-Fruit Insect Investigations. CONTENTS Introduction Experiments, 1912. Experiments, 1913. Field Summarized review. Conclusions Experiments, 1914 19 I Key to tables. INTRODUCTION. Numerous experiments with miscellaneous insecticides and spray combinations, including tests of a new and promising arsenical, namely, arsenate of calcium, were conducted in connection with other work at the field station for deciduous-fruit insect investigations, at Benton Harbor, Mich., during the seasons of 1912, 1913, and 1914. Various homemade and proprietary insecticides, alone and in com- bination with other sprays, were tested in the laboratory and in the field. This work was done under the instructions of Dr. A. L. Quaintance, in charge of Deciduous-Fruit Insect Investigations, and much valuable assistance in carrying out the work was rendered by Messrs. J. H. Paine, H. G. Ingerson, and D. M. Hamilton. EXPERIMENTS, 1912. A series of poison-feeding experiments were made to determine the comparative killing effect of various arsenicals and also doubtful stomach poisons on different species of chewing insects. At the be- ginning of the tests 32 different materials were used, but since the 1 See key to the table of insecticides on page 43. Note.—This bulletin describes experiments with various chemicals, singly and combined, for the destruction of insect pests. It will be of interest to horticulturists in general and apple growers in particular. 98119°—Bull. 278—15 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustration
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