Biostatistical Problems Involved in the Standardization of Liquid Household Insecticides

摘要: INTERSTATE commerce in insecticides, drugs and other chemicals that are intended to affect living organisms favorably or adversely is controlled by the Food Drug Administration of U. S. Department Agriculture. The laws require contents performance such products be truthfully stated on label. Some not susceptible accurate chemical analysis. Others analysis cannot interpreted terms biological performance. In order check it therefore necessary test them against estimate their value effects produced. These so-called tests made only law enforcement agencies but reputable manufacturers who wish maintain quality products. Biological most for determination liquid insecticides used control household insect pests, as houseflies, mosquitoes, bedbugs, cockroaches, etc. consist a more less refined kerosene oil which dissolved materials extracted from certain plants, synthetic organic compounds, combinations natural compounds. To these perfume may added. finished product dilute solution complex compounds difficult impossible evaluate chemically. liquids determined testing one species insects they control. method now almost exclusively this purpose outgrowth published Peet Grady 1928.1 Having learned how rear houseffies large numbers laboratory throughout year, set up 6 ft. cubical chamber within houseflies were released into an insecticide was then sprayed, filling with mist oil. As enough permit normal flight insects, practical conditions application room simulated at