Effectiveness of Species of Gliocladium, Paecilomyces, and Verticillium for Control of Meloidogyne arenaria in Field Soil

  • R. Rodriguez-Kabana
  • G. Morgan-Jones
  • G. Godoy
  • B. O. Gintis
Keywords: Population Dynamics, Nematode Ecology, Nonchemical Control, Methods, Peanut Root-Knot Nematode, Organic Amendments


The potential of several species and isolates of Gliocladium, Paecilomyces, and Verticillium, grown on autoclaved oat kernels, for use as biocontrol agents against Meloidogyne arenaria, was evaluated in two greenhouse experiments. The colonized oats were added to soil infested with M. arenaria at rates of 0-1.0% (w/w). Unamended soil and soil treated with uncolonized autoclaved oats were included in the experiments as controls. After treatment, soil was seeded with 'Summer Crookneck' squash (Cucurbita pepo) and allowed to develop for 6 weeks in a greenhouse. All amendments with uncolonized oats reduced the number of galls/g of root. Additional reductions in numbers of galls were observed in soil amended with oats colonized with 2 isolates of Gliocladium roseum, one isolate of G. catenulatum, one isolate of Paecilomyces lilacinus, and one isolate each of Verticillium lamellicola and V. chlamydosporium. Amendments with either of two other isolates of P lilacinus or with one isolate of