Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Aphanomyces euteiches causing aphanomyces root rot on lentil in North Dakota.

Abstract

Aphanomyces euteiches is the causal agent of Aphanomyces root rot (ARR) on field pea (Pisum sativum), alfalfa (Medicago sativa) and lentil (Lens culinaris). ARR can cause severe yield loss in lentil. This disease is widespread in the Canadian prairies and was first reported in the U.S. Pacific Northwest in 2010. North Dakota is responsible for much of U.S. lentil production with >74,000 ha planted, primarily in the northwest corner of the state. In 2018, lentil plants from a commercial field in North Dakota displayed symptoms consistent with ARR. Under microscopic examination, roots contained oospores consistent with A. euteiches. To confirm the identity of the pathogen, morphological observations, sequencing using the universal primers ITS1 and ITS4, and pathogenicity tests were carried out. This is thought to be the first report of A. euteiches on lentil in North Dakota.