Toxicity of Hydrogenated Pyrethrins I and II to the Housefly

Publisher Website
Google Scholar
Abstract
Pyrethrin I and pyrethrin II have good "knockdown effect" against flies but this effect is for the greater part destroyed when the pyrethrins are subjected to mild catalytic hydrogenation. Hydrogena-tion also materially reduces the mortality caused by the concentrate in which pyrethrin I predominates. The mortality caused by the concentrate in which pyrethrin II predominates was low and was not materially reduced by hydrogenation. The mortality caused by this sample was so low before hydrogenation that a marked reduction would not normally be expected. A comparison of the mortality caused by these two pyrethrin concentrates before hydrogenation indicates that the pyrethrin concentrates in which pyrethrin I predominates are more toxic to houseflies than those in which pyrethrin II predominates.

This publication has 0 references indexed in Scilit: