Pathogenicity stuthes in avocado with three nectriaceous fungi, Calonectria ilicicola, Gliocladiopsis sp. and llyonectria liriodendri

摘要

Calonectria ilicicola, Gliocladiopsis sp. and llyonectria liriodendri were isolated from diseased roots of young avocado trees. Pathogenicity stuthes with seedlings of three avocado cultivars, Velvick, Hass and Reed, demonstrated that Calonectria ilicicola is a severe root rot padiogen, reducing the biomass of healthy roots, and reducing plant height over time. Calonectria ilicicola was re-isolated from diseased roots, llyonectria liriodendri and Gliocladiopsis sp. were not pathogenic and plant height was increased after Gliocladiopsis sp. amendment compared to all other treatments in trials with cvs Velvick and Hass.