A Method of Determining the Relative Toxicity of Contact Insecticides, with Especial Reference to the Action of Nicotine Against Aphis Rumicis

Author： SHEPARD H. H.   RICHARDSON C. H.  

Publisher： Entomological Society of America

ISSN： 1938-291X

Source： Journal of Economic Entomology, Vol.24, Iss.4, 1931-08, pp. : 905-914

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