In six replicated field trials during a 3-year period the incidence of cowpea wet stem rot caused by Pythium aphanidermatum was significantly greater in plots treated with benzimidazole (BZ) fungicides than in plots treated with non-BZ fungicides and nontreated plots. In laboratory studies, the g...
Williams, R.J.
,
Ayanaba, A.
,
[Increased incidence of Pythium stem rot in cowpea treated with benomyl and related fungicides]
,
Increased incidence of Pythium stem rot in cowpea treated with benomyl and related fungicides
A bacterial wilt of cassava was observed in several areas of Nigeria in 1972. Symptoms and pathogen characteristics are similar to those of a cassava disease in South America caused by Xanthomonas manihotis. The disease is likely to be economically important in West Africa.
Schultze-Kraft, Rainer
,
Williams, R.J.
,
[Una nueva especie de Centrosoema (DC.) Benth. (Leguminosae: Papilionoideae) del Orinoco]
,
Una nueva especie de Centrosoema (DC.) Benth. (Leguminosae: Papilionoideae) del Orinoco
A new species of Centrosema is described and named C. tetragonolobum. It occurs in the region of the Orinoco river between latitudes 42 and 62 N in the Comisaría del Vichada, Colombia, and the Territorio Federal Amazonas, Venezuela. Characteristic features of the species are winged pods, chartace...
Schultze-Kraft, Rainer
,
Williams, R.J.
,
[Una nueva especie de Centrosema (DC.) Benth. (Leguminosae: Papilionoideae) del Orinoco]
,
Una nueva especie de Centrosema (DC.) Benth. (Leguminosae: Papilionoideae) del Orinoco
An experiment is described in which 27 accessions of Stylosanthes, comprising some seven species, were grown for 3 years in small swards at eight different sites covering a wide range of environments. The accessions used were selected on the basis of previous studies, so as to represent a wide ra...