INSECTICIDES AND FUNGICIDES 265 



Soaps and tobacco. 

 Soaps and emulsions. 

 Tobacco and lime-sulphur. 

 Tobacco and soaps. 

 Tobacco and emulsions. 

 Tobacco and alkalies. 



Some dangerous combinations are the following: 



Arsenate of lead (acid) and soaps. 



Arsenate of lead (acid) and emulsions. 



Arsenate of lead (acid) and alkalies. 



Arsenate of lead (neutral) and acids. 



Arsenite of zinc and lime-sulphur. 



Arsenite of zinc and soaps. 



Arsenite of zinc and emulsions. 



Arsenite of zinc and alkalies. 



Arsenite of zinc and acids. 



Hydrocyanic acid gas and Bordeaux mixture. 



REFERENCES 



The literature dealing with the subject is very extensive and cannot be 

 cited at all adequately in a brief resume such as this. The few recent 

 papers given will help the reader to an understanding of the range and 

 character of work being done to throw light on this important subject: 



"The Spraying of Plants." Lodeman. 



"The Chemical Composition of Insecticides and Fungicides." Bui. 68, Bur. of 

 Chem., U. S. Dept. Agr., 1902. 



"An Investigation of Lime-sulphur Injury Its Causes and Prevention." Bui. 

 No. 2, Ore. Agr. College Exp. Sta., 1913. 



"Fumigation and Spraying," Bui. No. 172, Kentucky Agr. Exper. Sta., 1913. 



"Chemical Studies of Lime-sulphur Lead-arsenate Spray Mixture." Research 

 Bui. No. 12, Iowa Exper. Sta., 1913. 



"Analyses of Materials Sold as Insecticides." Bui. No. 262. New Jersey Exper. 

 Sta., 1913. 



"Preparation of Nicotin Extracts on the Farm." Bui. No. 218, Virginia Agr. 

 Exper. Sta., 1914. 



"The Compatibility of Insecticides and Fungicides." By George P. Gray, Vol. 

 Ill, No. 7, Monthly Bulletin, Cal. State Cornm. of Horticulture, 1914. 



"A R-eport of Chemical Investigations on the Lime-sulphur Spray." Research 

 Bui. No. 3, Oregon Exper. Sta., 1914. 



"Experiments in the Dusting and Spraying of Apples." Bui. No. 340, N. Y. 

 Agr. Exper. Station (Ithaca), 1914. 



"Analyses of Materials Sold as Insecticides and Fungicides." Bui. No. 384, 

 N. Y. Agr. Exper. Station (Geneva), 1914. 



"Experiments in the Destruction of Fly Larvae in Horse Manure." Bui. No. 

 118, U. S. Dept. Agr., 1914. 



"Quassiin as a Contact Insecticide." Bui. No. 165, U. S. Dept. Agr., 1914. 



"Notes on the Preparation of Bordeaux Mixture." Circular No. 15, New Hamp- 

 shire Agr. Exper. Station. 1914. 



"Bordeaux Mixture/' Technical Bui. No. 8, New Hampshire Agr. Exper. Sta- 

 tion, 1914. 



"The Nicotin-Sulfate-Bordeaux Combination." By V. I. Safro, Journal of Eco- 

 nomic Entomology, Vol. 8, No. 2, 1915. 



"Homemade Lime-sulphur Concentrate." Bui. No. 197, U. S. Dept. Agr., 1915. 



"Para-Dichlorobenzene as an Insect Fumigant." Bui. No. 167, U. S. Dept. 

 Agr., 1915, 



