The occurrence of mustard oil glucosides in Lepidium hyssopifolium Desv., L. bonariense (L.) and Capsella bursa pastoris (L.) Medic

Abstract

The annual crucifers, Lepidium hyssopifolium Desv. and L. bonariense (L.) (pepperwort or peppercress), and Capsella bursa pastoris (L.) ;Medic. (shepherd's purse) are common weeds of farm and pasture in south-east Queensland. These and other cruciferous weeds are frequently grazed by livestock during dry winter months and when ingested can impart objectionable flavours to the milk of dairy cattle, or to chicken and beef flesh.l.2 The incidence of "weed taints" in milk and other dairy produce can be quite severe during unfavourable seasonal conditions and is of considerable economic concern to the dairy industry in Queensland.