Premium
THE PROBLEM OF THE EVALUATION OF ROTENONE‐CONTAINING PLANTS
Author(s) -
TATTERSFIELD F.,
MARTIN J. T.
Publication year - 1935
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1935.tb07153.x
Subject(s) - rotenone , biology , relative standard deviation , ether , toxicology , botany , chromatography , chemistry , organic chemistry , biochemistry , detection limit , mitochondrion
S ummary .1 Seven samples of Derris root have been examined chemically and the following determinations carried out: rotenone (crude and recrystallised), ether extract, methoxyl content, and dehydro compounds. The importance of using standard methods of analysis is stressed. 2 Insecticide tests have been carried out and comparisons made between pairs of samples tested on the same day. 3 When comparisons were made between pairs belonging to different species of Derris , the determinations of rotenone by the present methods, ether extract or methoxyl content did not express accurately the relative insecticidal potencies of the pairs of samples. When comparisons were made between pairs of the same species, all these determinations appeared to give a closer measure of their relative activities. 4 In our samples, the estimation of the dehydro compounds, or of rotenone plus the dehydro compounds in the resin, gave a better assessment of the relative potencies than the other determinations, whether comparisons were made between samples of the same, or of different species. Further work is, however, needed.