Anthracnose field evaluation of sorghum germplasm from Botswana by John E. Erpelding

“…In this study, 154 sorghum accessions from the Botswana collection maintained by the United States National Plant Germplasm System were inoculated with Colletotrichum sublineolum and evaluated for disease resistance at the Tropical Agriculture Research Station in Isabela, Puerto Rico during 2007 and 2008. A resistant response was observed for 69 accessions in 2007 and for 48 accessions in 2008 with no acervuli development observed on inoculated leaves. …”
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NEW SOURCES OF GRAIN MOLD RESISTANCE AMONG SORGHUM ACCESSIONS FROM SUDAN by Louis Kajac Prom, John Erpelding

“…  Fifty-nine sorghum accessions from Sudan were evaluated in replicated plots at Isabela, Puerto Rico, for resistance against Fusarium thapsinum, one of the causal agents of grain mold.  The environmental conditions such as temperature, relative humidity, and rainfall during this study, especially at and after physiological maturity were optimal for grain mold development.  Highly significant negative correlations between grain mold severity ratings in the field and on threshed grains with germination rate and seed weight were recorded, indicating that germination and seed weight were adversely affected when challenged with F. thapsinum.  Temperature showed a significant negative correlation with grain mold severity and a significant positive correlation with germination rate.  However, no significant correlation was observed between rainfall and grain mold severity or germination rate.  Accessions PI570011, PI570027, PI569992, PI569882, PI571312, PI570759, and PI267548 exhibited the lowest grain mold severities and among the highest germination rates, indicating that these accessions may possess genetic resistance to grain mold and might be useful in sorghum enhancement programs.  Four of these accessions had significantly higher germination rates than the resistant control genotypes with PI267548 having the highest germination rate.  PI267548 was the only white seeded accessions showing significantly better grain mold resistance than the control genotypes.…”
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Screening a newly developed common bean germplasm with improved resistance to ashy stem blight in multiple environments by Diego M. Viteri, Angela M. Linares-Ramírez

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Selección recurrente recíproca en maíz: tolerancia al ataque del gusano de la mazorca y el cogollero (Lepidoptera: Noctuidae). by Mario Fuentes, Alberto Pantoja, Antonio Sotomayor, James Beaver

“…Los experimentos se realizaron en la finca experimental de la Estación de Investigación en Agricultura Tropical (TARS) del Departamento de Agricultura de los Estados Unidos ubicada en Isabela, Puerto Rico. Se utilizó el diseño de bloques completos al azar con cinco repeticiones y los tratamientos se asignaron en un arreglo factorial de parcelas divididas a una densidad de 44.444 plantas/ ha. …”
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Agronomic performance of common and tepary bean genotypes and their response to ashy stem blight in Isabela and Lajas, Puerto Rico by Diego M. Viteri, Angela M. Linares

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Performance of Mesoamerican bean (Phaseolus vulgaris L.) lines in an unfertilized oxisol by James S. Beaver, Abiezer González-Vélez, Giovanni Lorenzo-Vázquez, Raul Macchiavelli, Timothy G. Porch, Consuelo Estevez-de-Jensen

“…The performance of twenty-seven Mesoamerican bean (Phaseolus vulgaris L.) lines from the Bean Abiotic Stress Evaluation (BASE) 120 panel were evaluated in an unfertilized oxisol at Isabela, Puerto Rico over five growing seasons (four-year period from 2015-2018). …”
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