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Nine isolates of Peronosclerospora sorghi from maize, sorghum and wild sorghum were sampled from Zimbabwe, Zambia, Rwanda, Mozambique and Kenya. They were compared for variation in conidium and conidiophore morphology, temperature requirements for sporulation, germination and germ-tube growth and...


Bock, C.H.Jeger, M.J.Mughogho, L.K.Cardwell, K.Mtisi, E.Kaula, G.Mukansabimana, D.[Variability of Peronosclerospora sorghi isolates from different geographic locations and hosts in Africa]Variability of Peronosclerospora sorghi isolates from different geographic locations and hosts in Africa

Sorghum ergot in India is caused by Claviceps africana and C. sorghi. The distributions of these two species in India is not known. Eighty-nine sorghum ergot isolates were cultured from young sphacelia obtained from male sterile sorghum plants artificially inoculated using inoculum collected in t...


Muthusubramanian, V.Bandyopadhyay, RanajitRajaram Reddy, D.Tooley, P.[Cultural characteristics, morphology, and variation within Claviceps africana and C. sorghi from India]Cultural characteristics, morphology, and variation within Claviceps africana and C. sorghi from India

In Africa, sorghum downy mildew (SDM), caused by Peronosclerospora sorghi, infects both sorghum and maize. Systemic infection can result in severe yield loss. The effects of seed treatments and foliar sprays of metalaxyl on the disease were determined on maize in Nigeria (1992) and sorghum in Zim...


Bock, C.H.Jeger, M.J.Cardwell, K.F.Mughogho, L.K.Sherington, J.[Control of sorghum downy mildew of maize and sorghum in Africa]Control of sorghum downy mildew of maize and sorghum in Africa

Development of sorghum downy mildew, incited by Peronoscleospora sorghi (Weston and Uppal) C.G. Shaw, on maize, sorghum and Johnson grass was investigated at two locations in Uganda during three seasons (1994 and 1995). More sorghum downy mildew developed on the Johnson grass and sorghum than on ...


Bigirwa, G.Adipala, E.Esele, J.Cardwell, K.[Reaction of maize, sorghum and Johnsongrass to Peronosclerospora sorghi]Reaction of maize, sorghum and Johnsongrass to Peronosclerospora sorghi

Aphid landing rates were monitored with horizontal mosaic green pan traps in monocultures of soybean, Glycine max (L.) Merrill, and in additive mixtures of soybean with dwarf or tall isolines of sorghum, Sorghum bicolor (L.) Moench. Rhopalosiphum maidis (Fitch) colonized sorghum whorls and was th...


Bottenberg, H.Irwin, M.E.[Canopy structure in soybean monocultures and soybeansorghum mixtures: impact on aphid (Homoptera: Aphididae) landing rates]Canopy structure in soybean monocultures and soybeansorghum mixtures: impact on aphid (Homoptera: Aphididae) landing rates

Sorghum ergot, initially restricted to Asia and Africa, was recently found in the Americas and Australia. Three species causing the disease have been reported: Claviceps sorghi in India, C. sorghicola in Japan, and C. africana in all ergot-positive countries. The objective of our study was to stu...


Pazoutova, S.Bandyopadhyay, RanajitFrederickson, D.E.Mantle, P.G.Frederiksen, R.A.[Relations among sorghum ergot strains from the United States, Mexico, Puerto Rico, Bolivia, India and Australia]Relations among sorghum ergot strains from the United States, Mexico, Puerto Rico, Bolivia, India and Australia
Navi, S.S.Bandyopadhyay, RanajitTonapi, V.A.Rao, T.G.N.Tooley, P.W.Reddy, R.K.Indira, S.Pande, S.[Prevalence of ergot of sorghum in India]Prevalence of ergot of sorghum in India

A four year field study was conducted in central Texas to evaluate the effects of sorghum (Sorghum bicolor L. Moench) genotype, fertilizer N application rate and stover removal on crop yields and plant nutrient uptake and partitioning. Fertilizer N application rates of 112 kg ha were generally su...


Powell, J.M.Hons, F.M.[Fertilizer nitrogen and stover removal effects on sorghum yields and nutrient uptake and partitioning]Fertilizer nitrogen and stover removal effects on sorghum yields and nutrient uptake and partitioning

Illustrates the practical advantages of considering the usual indicators as random variables, using farm data from semiarid West Africa. Defines four indicators in comon use and discusses their random character. Presents an estimation of population parameters of the indicators from sample survey ...


McIntire, John M.Delgado, Christopher L.[Statistical significance of indicators of efficiency and incentives: Examples from West African agriculture]Statistical significance of indicators of efficiency and incentives: Examples from West African agriculture
Trouche, G.Vom Brocke, KirstenAguirre Acuña, S.Chow, Z[Giving new sorghum variety options to resource-poor farmers in Nicaragua through participatory varietal selection]Giving new sorghum variety options to resource-poor farmers in Nicaragua through participatory varietal selection

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