Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Macrophomina phaseolina on birdsfoot trefoil (Lotus corniculatus) in Alabama.

Abstract

Stand decline disease of the birdsfoot trefoil (L. corniculatus) cultivars and breeding lines was observed at the Plant Breeding Unit of the E.V. Smith Research Centre in Tallassee, Alabama, USA. Disease incidence was 17% of the plant population (143 of 840 total plants) with symptoms included wilting, discoloration of the roots and hypocotyl at the soil line, and eventually plant death. All symptomatic plants were collected from September through October in 2015 from half-sib individuals in the field. Based on morphological characteristics, sequence analysis of the rDNA internal transcribed spacer region and pathogenicity tests, the causal agent was identified as M. phaseolina. This fungus has been previously recognized to infect birdsfoot trefoil in Maryland, USA. It is an important pathogen of crops and widespread in Alabama and, thus, must be considered in birdsfoot trefoil productions systems.