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Abstract Background Cassava whitefly outbreaks were initially reported in East and Central Africa cassava (Manihot esculenta Crantz) growing regions in the 1990’s and have now spread to other geographical locations, becoming a global pest severely affecting farmers and smallholder income. Whitefl...


Perez-Fons, LauraBohorquez-Chaux, AdrianaIrigoyen, Maria L.Garceau, Danielle C.Morreel, KrisBoerjan, WoutWalling, Linda L.Becerra López Lavelle, Luis AugustoFraser, Paul D.[A metabolomics characterisation of natural variation in the resistance of cassava to whitefly]A metabolomics characterisation of natural variation in the resistance of cassava to whitefly

Seed multiplication, agronomic evaluation, and identification of parental genotypes for interspecific hybridization with Phaseolus vulgaris constitute the main research activities carried out in the P. coccineus collection (around 1600 accessions) held by CIAT. In 1985, 3 Ascochyta screening tria...


Schmit, VéroniqueBaudoin, Jean-Pierre[Evaluations for Ascochyta resistance in Phaseolus coccineus germplasm collection at C.I.A.T. (Centro International de Agricultura Tropical, Cali, Colombia)]Evaluations for Ascochyta resistance in Phaseolus coccineus germplasm collection at C.I.A.T. (Centro International de Agricultura Tropical, Cali, Colombia)

Investigations were conducted at CIAT to develop methodology required to evaluate resistance to Isariopsis griseola inherent in bean germplasm and breeding progeny. Abundant sporulation by the pathogen has been achieved by growing isolates in the lab. on V-8 medium incubated at 19 degrees Celsius...


Álvarez Ayala, G.Schwartz, Howard F.[Preliminary investigations of pathogenic variability expressed by Isariopsis griseola]Preliminary investigations of pathogenic variability expressed by Isariopsis griseola

Significant advances in increasing tolerance to the leafhopper Empoasca kraemeri Ross & Moore in common bean have been obtained using a new breeding scheme where yield under leafhopper attack is the principal selection criterion in the evaluation of progenies. However, to further refine this bree...


Kornegay, Julia L.Cardona, C.[Development of an appropriate breeding scheme for tolerance to Empoasca kraemeri in common bean]Development of an appropriate breeding scheme for tolerance to Empoasca kraemeri in common bean

The bean weevil Acanthoscelides obtectus, is an important storage pest of common beans in Latin America and Africa. A few wild bean accessions from Mexico have been identified as highly resistant to the weevil. One accession, G 12952, was crossed to two susceptible bean cultivars differing in see...


Kornegay, Julia L.Cardona, C.[Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars]Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars

The parasitic weed, Striga gesnerioides, is a major threat to cowpea productivity throughout the savannas of West and Central Africa. The identification of sources of S. gesnerioides resistance and their incorporation into breeding programs would be a beneficial strategy to combat the devastation...


Omoigui, L.O.Kamara, A.Alunyo, G.I.Bello, L.Oluoch, M.Timko, M.P.Boukar, O.[Identification of new sources of resistance to Striga gesnerioides in cowpea Vigna unguiculata accessions]Identification of new sources of resistance to Striga gesnerioides in cowpea Vigna unguiculata accessions

Aflatoxin contamination caused by Aspergillus flavus infection of corn is a significant and chronic threat to corn being used as food or feed. Contamination of crops at levels of 20 ng g–1 or higher (as regulated by the USFDA) by this toxin and potent carcinogen makes the crop unsalable, resultin...


Brown, R.Menkir, A.Chen, Z.Bhatnagar, D.Yu, J.Yao, H.Cleveland, T.[Breeding aflatoxinresistant maize lines using recent advances in technologies a review]Breeding aflatoxinresistant maize lines using recent advances in technologies a review

Cowpea aphid (Aphis craccivora Koch) is a major pest of cowpea (Vigna unguiculata L. Walp.) particularly in the drier regions of the tropics. Although aphid resistant varieties had been developed, resistance has recently broken down. The present study seeks to identify new sources of resistance. ...


Souleymane, A.Akenova, M.E.Fatokun, C.A.Alabi, Y.[Screening for resistance to cowpea aphid (Aphis craccivora koch) in wild and cultivated cowpea (Vigna unguiculata L. walp.) accessions]Screening for resistance to cowpea aphid (Aphis craccivora koch) in wild and cultivated cowpea (Vigna unguiculata L. walp.) accessions

Silicon (Si) has been reported to be a beneficial element and shown to enhance disease resistance in many crops, although it is not regarded to be critical for plant growth and development. In this study, the potential effect of Si supplementation on resistance to banana xanthomonas wilt (BXW) di...


Mburu, K.Oduor, R.Mgutu, A.J.Tripathi, L.[Silicon application enhances resistance to xanthomonas wilt disease in banana]Silicon application enhances resistance to xanthomonas wilt disease in banana

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