Response of peanut genotypes to three density planting and present diseases at Quevedo, Ecuador

Abstract

The aim of this study was to determine the effect of seeding density on sanitary and agronomic characteristics of promising peanut genotypes, in Quevedo, Ecuador. The following promising peanut lines were used: CB-02, CB-16 and CB-23, Runner type, with a standard distance of 0,50 m between rows and 3,6; 5 and 10 plants m-1 for each cultivar. The disease intensity of leaf spot and rust were determined, furthermore, agronomic variables such as plant height, number of pods and seeds, pod weight per plant, weight of 1000 seeds, weight of pods per parcel and pod yield (kg ha-1). The experiment was carried on a Completely Randomized Block design with 9 treatments and four replications, using a factorial arrangement 3 (lines) x 3 (plants m-1). Tukey�??s test at 5% of significance level was used for separation of means. The smallest number of leaf spot and rust lesions was observed on the peanut line CB-23. On the one hand, at plant densities of 3,6 and 5 plants m-1 lead to the highest number of pods per plant (321,83 and 286,50 respectively). On the other hand, the highest plant height (47,24 cm), weight of pods per parcel (2,00 kg) and pod yield (1809,42 kg ha-1) were observed at 10 plants m-1. The interaction between factors was significant for the following variables: number of seeds per plant (p<0,05) and yield (p<0,01), showing the dependence between the analyzed factors.