Tag Archives: repellents

Biologically active chemicals in yellow-cedar protect tree tissues and possibly human health

Nootkatone, a biologically active oxygenated sesquiterpene in yellow-cedar heartwood

Yellow-cedar trees, also known as Callitropsis nootkatensis, can live for hundreds of years because they have has few insect or pathogen pests. Periodic studies over the last century have examined extractable chemicals in their tissues and discovered