Evaluación del crecimiento de cuatro especies de hongos nematófagos en sustratos líquidos y sólidos en condiciones controladas.

Abstract

This present research aimed to determine the growth of four nematophagous fungi of the genus Arthrobotrys on six organic formulation substrates. Two species of Arthrobotrys oligospora, Arthrobotrys mussiformis and Arthrobotrys conoides, were used for the evaluation in the six types of substrates. The amount of mycelium obtained in each treatment was quantitatively determined through the measurement of the growth rate and percentage of mycelium. The analysis of CFU/ml was carried out to evaluate the viability of the colonies after having grown on the substrates. At the same time, the physicochemical characteristics of the substrates were determined through physicochemical analysis (ash, total sugars, crude protein, humidity, pH) and the growth of the fungi was compared to the properties of the substrates. The oat substrate supported growth for the species A. oligospora and A. conoides, as the molasses substrate registered the maximum mycelial growth for A. mussiformis and A. conoides in the enriched substrate. From the analysis of CFU/ml it was determined that the species A. conoides and A. mussiformis in molasses substrate, A. conoides in morocho and A. oligospora in oats show greater viability of colonies. It is concluded that oat substrates, enriched substrate and molasses help to spread these species of nematophagous fungi.