. Bees and their relation to arsenical sprays at blossoming time. Bees. It was the object of this experiment to determine definitely whether bees absorbed poison into their systems in this manner, and if so, whether such doses were sufficiently large to be fatal. The work was carried on in cooperation with the Department of Horticulture of Purdue University, and the analysis and feeding phase of the work was generally supervised by Mr. H. A. Noyes, Research Chemist, then of that department. FIELD OPERATIONS Apple trees were caged with screen and cheese-cloth (See Fig. i). When the trees were i
. Bees and their relation to arsenical sprays at blossoming time. Bees. It was the object of this experiment to determine definitely whether bees absorbed poison into their systems in this manner, and if so, whether such doses were sufficiently large to be fatal. The work was carried on in cooperation with the Department of Horticulture of Purdue University, and the analysis and feeding phase of the work was generally supervised by Mr. H. A. Noyes, Research Chemist, then of that department. FIELD OPERATIONS Apple trees were caged with screen and cheese-cloth (See Fig. i). When the trees were in full bloom lime-sulphur testing one degree Baume. Fig. 1. Tree surrounded by a cage having window screen on the top and sides and cheese-cloth on the bottom. A colony of bees is shown near the trunk of the tree. and one pound powdered arsenate of lead to 50 gallons of water was applied. Bee colonies were then moved into the cages and observations made on them. Also trees in full bloom in the open were sprayed, while others were left unsprayed. Observations were made on both. Dead bees were gathered from the cages, counted, and analyzed for arsenic. LABORATORY WORK These experiments naturally divided themselves into three divisions: (i) the ascertaining of the amount of soluble arsenic it took to kill a bee; (2) whether a bee working upon a mixture of insoluble arsenic and syrup would take up the arsenic particles: and (3) whether bees that were found dead near the experimental trees contained arsenic internally that ac- counted for their 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 Price, W. Armstrong (William Armstrong), 1889-. [Lafayette, Ind.
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Keywords: ., bo, bookcentury1900, bookdecade1920, booksubjectbees, bookyear1920
