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Diseases and productivity of genotypes promising common bean in Ecuador

Abstract:

Diseases are the main problem of the bean crop in this part of the country. Therefore, this study aimed to quantify the intensity of foliar and root diseases and production in seven genotypes of common bean. We used the lineages Ser-03, Ser-08 e Ser-31, EVG-06-103, EVG-16, the creole genotype Pata de paloma and variety INIAP-473, the latter being used as a control. Evaluated the severity of rust (Uromyces appendiculatus) and web blight (Rhizoctonia solani) in reproductive growth stages R7 (pod formation) and R8 (beginning of pod filling), and the incidence of charcoal rot (Macrophomina phaseolina), Rhizoctonia root rot (R. solani) and Fusarium wilt (Fusarium oxysporum f. sp. phaseoli). Also quantified the number of beans, grains and seeds per pod per plant, thousand grain weight (g) and productivity (kg ha<sup>-1</sup>). Randomized complete block design we used with seven treatments (genotypes) and four replications. To compare the treatment means was employed by Scott-Knott (p≤0.05). Genotypes Ser-03, Ser-08, Ser-31, EVG-16 and Pata de paloma had the lowest intensity of web blight and Rhizoctonia root rot caused by R. solani, the highest number of pods and seeds per plant, and including the first three lines were the most productive.