Biological Control of Yellow Nutsedge with the Indigenous Rust Fungus Puccinia canaliculata

Science  25 Mar 1983:
Vol. 219, Issue 4591, pp. 1446-1447
DOI: 10.1126/science.219.4591.1446


Yellow nutsedge (Cyperus esculentus L.) is a serious weed problem in the United States and other countries. An indigenous rust fungus [Puccinia canaliculata (Schw.) Lagerh.], pathogenic on yellow nutsedge, was released in early spring as a potential biological control agent. The fungus inhibited nutsedge flowering and new tuber formation. The fungus also dehydrated and killed nutsedge plants. The successful control of yellow nutsedge by a rust epiphytotic under experimental conditions demonstrates the potential use of the rust in an integrated weed management system.