Biological control of root rot in Rangpur lime plants
The aim of this work was to evaluate the potential of 15 isolates of Trichoderma on the control of root rot caused by Phytophthora parasitica in Rangpur lime plants. Among the isolates evaluated, 60% inhibited the pathogen in dual culture and produced enzymes capable of degrading cellulose present in the culture medium. T. pseudokoningii ACB-37, T. virens ACB-32, T. aureoviride ACB-33, and T. viride ACB-14 inhibited the pathogen and were evaluated for their ability to control the disease under greenhouse conditions. Suspensions (106 spores.-1) of the strains ACB-37, ACB-32 and ACB-33, added separately, onto the substrate in the pots controlled the damage caused by the disease and increased plant development. It is concluded that these three isolates of Trichoderma are promising biocontrol agents of root rot caused by P. parasitica in plants of Rangpur lime.