High dynamic dilutions and genetic variability to phytosanitary management and yield of beans (Phaseolus vulgaris L)

Abstract

The substitution of landrace populations of beans (Phaseolus vulgaris L.) by commercial cultivars provided genetic uniformity and loss of rusticity. It makes the bean plants more vulnerable to pests, increasing the use of pesticides. The objective of this work was to evaluate the productivity and health of beans landraces compared to commercial cultivars, reducing the effect of high dynamic dilutions. The evaluated traits were grain yield (kg ha-1), thousand grain weight (g), and occurrence of anthracnose (Colletotrichum lindemuthianum) and bacteriosis (Xanthomonas sp.). Evaluation of high dynamic dilutions was also done in addition to the previous variables, was evaluated number of pods per plant and pods with the presence of anthracnose. The analysis of the data did not show any differences in the productivity and disease rate between the landraces and the commercial cultivars of beans. The high dynamic dilutions do not show any conclusive results in terms of productivity. However, all treatments were superior in phytosanitary management compared to control