
%0 Journal Article
%A Russell, GB 
%A Fenemore, PG 
%A Singh, P 
%T Insect-Control Chemicals from Plants. Nagilactone C, A Toxic Substance from the Leaves of Podocarpus Nivalis and P. Hallii
%J Australian Journal of Biological Sciences
%D 1972/10/01
%V 25
%N 5
%P 1025-1030
%K 
%R https://doi.org/10.1071/BI9721025
%U https://www.publish.csiro.au/paper/BI9721025 
%X Feeding tests showed that the powdered dried leaves and leaf extract of P. nivalis Hook and P. hallii Kirk are toxic to housefly larvae when incorporated into a milk diet. An active toxic ingredient has been isolated and identified as the known norditerpene lactone, nagilactone C. Nagilactone Cat 50 p.p.m. in a defined medium was toxic to housefly larvae. At lower concentrations it inhibited larval growth, maturation to pupae, and emergence of adults. Nagilactone C was not toxic to 3-4-day·old housefly larvae or to 2-3 day old adults when applied topically at the rate of 5 p.g per insect. 
