Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: August 12, 2001
Publication Date: N/A
Gliocladium virens (strain Gl-3) and Burkholderia cepacia (strains Bc-2 and Bc-F) were tested for activity against root-knot nematode (Meloidogyne incognita) on greenhouse-grown pepper (Capsicum annuum). The organisms were applied alone (as viable and nonviable formulations) and in combinations (Bc-F+Gl-3, Bc-2+Gl-3, Bc-F+Bc-2, and Bc-F+Bc-2+Gl-3) as seed coatings and again as drenches at transplant. Ten weeks after transplant, dry shoot weights of nematode-inoculated plants treated with viable Bc-F or Bc-2 were higher (P<0.05) than dry shoot weights of plants from most other treatments. Some combinations had synergistic effects on root and/or dry shoot weights. Compared to the untreated control plants, numbers of eggs+second-stage juveniles per g of root were lower (P<0.05) with Gl-3, Bc-2, and Bc-F treatments, and higher with application of nonviable Gl-3. Combination treatments did not affect nematode numbers. Individual preparations of Gl-3, Bc-2, or Bc-F suppressed root-knot nematode populations on pepper, while microbe combinations were not effective biocontrol agents.