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Ojiambo, P.S.Twizeyimana, M.Tenkouano, A.Bandyopadhyay, Ranajit[Rapid and mass screening of banana and plantain for resistance to Black sigatoka disease using detached leaf and in vitro plantlets]Rapid and mass screening of banana and plantain for resistance to Black sigatoka disease using detached leaf and in vitro plantlets

This study investigated the utility of inoculation of in vitro plantlets in tubes and detached leaves as reliable and rapid assays for screening Musa genotypes against Mycosphaerella fijiensis, the causal agent of black leaf streak. In the first part of the study, three types of inocula were eval...


Twizeyimana, M.Ojiambo, P.S.Tenkouano, A.Ikotun, T.Bandyopadhyay, Ranajit[Rapid screening of Musa species for resistance to black leaf streak using in vitro plantlets in tubes and detached leaves]Rapid screening of Musa species for resistance to black leaf streak using in vitro plantlets in tubes and detached leaves

Aflatoxin contamination of major food crops is a serious problem in Senegal. Maize and sesame samples were collected during a survey in five districts located in two agro-ecological zones in Senegal to determine levels of aflatoxin contamination and the distribution and toxigenicity potential of ...


Diedhiou, P.M.Bandyopadhyay, RanajitAtehnkeng, J.Ojiambo, P.S.[Aspergillus colonization and aflatoxin contamination of maize and sesame kernels in two agro-ecological zones in Senegal]Aspergillus colonization and aflatoxin contamination of maize and sesame kernels in two agro-ecological zones in Senegal

Ochratoxin A (OTA) is a mycotoxin commonly associated with many food and beverage crops grown in tropical and temperate regions. There is no data available regarding OTA contamination of ready for sale cocoa beans in Nigeria. The objective of this study was to assess the levels of OTA contaminati...


Dongo, L.Bandyopadhyay, RanajitKumar, M.Ojiambo, P.S.[Occurrence of Ochratoxin A in Nigeria ready for sale cocoa beans]Occurrence of Ochratoxin A in Nigeria ready for sale cocoa beans

Soybean rust, caused by Phakopsora pachyrhizi, is one of the most important constraints to soybean production worldwide. The absence of high levels of host resistance to the pathogen has necessitated the continued search and identification of sources of resistance. In one set of experiments, 178 ...


Twizeyimana, M.Ojiambo, P.S.Ikotun, T.Ladipo, J.L.Hartman, G.L.Bandyopadhyay, Ranajit[Evaluation of soybean germplasm for resistance to soybean rust (Phakopsora pachyrhizi) in Nigeria]Evaluation of soybean germplasm for resistance to soybean rust (Phakopsora pachyrhizi) in Nigeria

Fourteen soybean accessions and breeding lines were evaluated for resistance to soybean rust caused by the fungus Phakopsora pachyrhizi. Evaluations were conducted in replicated experiments in growth chambers using detached leaves and under greenhouse and field conditions. In growth-chamber exper...


Twizeyimana, M.Ojiambo, P.S.Ikotun, T.Paul, C.Hartman, G.L.Bandyopadhyay, Ranajit[Comparison of field, greenhouse and detachedleaf evaluations of soybean germplasm for resistance to Phakopsora pachyrhizi]Comparison of field, greenhouse and detachedleaf evaluations of soybean germplasm for resistance to Phakopsora pachyrhizi

Simple sequence repeat (SSR) markers were used to classify 116 isolates of Phakopsora pachyrhizi, the cause of soyabean rust, collected from infected soyabean leaves in four agroecological zones in Nigeria. A high degree of genetic variation was observed within the sampled populations of P. pachy...


Twizeyimana, M.Ojiambo, P.S.Haudenshield, J.S.Caetano‐Anollés, G.Pedley, K.F.Bandyopadhyay, RanajitHartman, G.L.[Genetic structure and diversity of Phakopsora pachyrhizi isolates from soyabean]Genetic structure and diversity of Phakopsora pachyrhizi isolates from soyabean

In field trials on Premier rabbit eye blueberry, individual shoots were selected and tagged in the fall of 2001, 2002, and 2003 to quantify the effects of Septoria leaf spot severity and disease-induced premature defoliation on flower bud set and return yield. Experiments were carried out similar...


Ojiambo, P.S.Scherm, H.Brannen, P.M.[Septoria leaf spot reduces flower bud number and return yield in southern blue berries]Septoria leaf spot reduces flower bud number and return yield in southern blue berries

Studies to evaluate the effectiveness of biological control in suppressing plant disease often report inconsistent results, highlighting the need to identify general factors that influence the success or failure of biological control in plant pathology. We conducted a quantitative synthesis of pr...


Ojiambo, P.S.Scherm, H.[Factors affecting plant disease suppression by biocontrol: a meta analysis]Factors affecting plant disease suppression by biocontrol: a meta analysis

In a 3-year field study, Premier rabbiteye blueberry plants were sampled at three hierarchical levels (leaf, shoot, and bush) to assess severity of Septoria leaf spot (caused by Septoria al- bopunctata) and incidence of defoliation. A positive linear relationship (R2= 0.977, P< 0.0001, n = 2127) ...


Ojiambo, P.S.Scherm, H.[Optimum sample size for determining disease severity and defoliation associated with Septoria leaf spot of blueberry]Optimum sample size for determining disease severity and defoliation associated with Septoria leaf spot of blueberry

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