Effect of plant spacing and cropping pattern on brown blotch (Colletotrichum truncatum) of cowpea.
Field studies were conducted at Ibadan, Nigeria, to determine the effect of plant spacing and cropping pattern on brown blotch, caused by Colletotrichum truncatum. A greater reduction of the disease occurred on cowpeas (Vigna unguiculata) intercropped with maize than on monocropped cowpeas. Cowpeas at wider spacings (between and within rows) showed lower disease incidence and severity in both monocrop and intercrop patterns than those at closer spacings. Lower but more marketable yields were obtained from intercropped than monocropped cowpeas, and from cowpeas grown at wider row spacings than those from closer spacings.