Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: June 15, 2002
Publication Date: June 20, 2002
Citation: Meyer, S.L., Roberts, D.P., Nitao, J.K., Chitwood, D.J. Detection of root-associated microbes that produce compounds active against plant-parasitic nematodes. 2002. Phytopathology 92(suppl): S55-S56.
Rhizosphere-inhabiting bacteria and fungi isolated from soil and plant roots, and known to be active against plant-pathogenic fungi, were assayed in vitro for production of compounds antagonistic to root-knot nematode (Meloidogyne incognita). In addition, culture filtrates of fungi isolated from eggs of soybean cyst nematode (Heterodera glycines) were tested for activity against M. incognita and H. glycines. Several culture filtrates from the microbes isolated from soil and plant roots inhibited M. incognita egg hatch and/or mobility of second-stage juveniles. Filtrates of ca. 10 percent of the fungi collected from H. glycines suppressed egg hatch of the source nematode by more than 60 percent or inhibited juvenile mobility, and ca. 19 percent similarly affected M. incognita. Identification of agents with potential to act against plant-pathogenic fungi and plant-parasitic nematodes may be useful for suppression of multiple plant diseases.