Horsebean (Canavalia ensiformis) and Cortalaria (Crotalaria spectabilis) for the Management of Meloidogyne spp.

Abstract

In a greenhouse experiment at Cabrils, Spain, horsebean (Canavalia ensiformis) roots in pots inoculated with an isolate of Meloidogyne incognita race 1 from Spain became severely galled 7 weeks after inoculation; roots from pots inoculated with Spanish isolates of M. arenaria race 2 or M. javanica had few or no galls. In another greenhouse experiment at Auburn, Alabama, U.S.A., with field soil infested with Heterodera glycines race 4 and M. arenaria race 2, roots of horsebean and showy crotalaria (Crotalaria spectabilis) developed no galls although severe galling occurred in roots of 'Davis' soybean (Glycine max) and 'Summer Crookneck' squash (Cucurbita pepo); increases in H. glycines populations were associated only with soybean. In microplots filled with naturally infested soil at Auburn, crotalaria suppressed populations of M. arenaria; horsebean, soybean, and squash did not. When 'Purple Hull' cowpea (Vigna unguiculata) was planted following a crotalaria crop, final juvenile popu