Some Field Tests Showing the Comparative Efficiency of Derris, Pyrethrum and Hellebore Powders on Different Insects

Author: HAMILTON CLYDE C.   GEMMELL LOUIS G.  

Publisher: Entomological Society of America

ISSN: 1938-291X

Source: Journal of Economic Entomology, Vol.27, Iss.2, 1934-04, pp. : 446-453

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