Journal of Nematology (2004) 36, p. 328 (Kokalis-Burelle et al.)
N. Kokalis-Burelle and A.P. Nyczepir (2004)
Host- range studies for Meloidogyne floridensis
Journal of Nematology 36 (3), 328-328
paper presented at the Society of Nematologists 43rd Annual Meeting, Estes Park, Colorado 7-11 August 2004
Abstract: Meloidogyne floridensis has recently (2004) been characterized as a new root-knot nematode species although it was initially identified in 1982 as M. incognito race 3. This nematode was first detected in 1966 in Gainesville, Florida, on a site cleared of native timber and used for peach rootstock trials. The nematode was reported to reproduce on root-knot nematode resistant Nemaguard and Okinawa peach rootstocks. In the 1970's, this nematode was detected in additional surrounding sites previously planted to soybeans, corn, lupine and red clover. Host range studies were performed to determine the reproductive potential (RP) of M. floridensis on several vegetable, ornamental, and herb crops important to Florida, where this nematode has been isolated with increasing frequency. Crops tested were tomato, bell pepper, cucumber, eggplant, squash, collards, Strawberry; impatiens, marigold, verbena, snapdragon, begonia, parsley, sage, basil, and dill. Plants were potted in a nematode-free sand:peat moss mix, inoculated with 5,000 M. floridensis eggs/1,000 cm3 soil, and grown in the greenhouse for 30 days. Eggs were extracted from roots and RP was calculated using Pf/Pi ratios. The highest levels of M. floridensis reproduction were observed on verbena (12.6), eggplant (8.1), squash (7.6), and basil (6.8), followed by intermediate reproduction levels for impatiens (3.3), tomato (1.9), snapdragon (1.6), and dill (1.2). Sage, marigold, cucumber, begonia, parsley, collards, strawberry and pepper had RP values < 1.0 and were considered non-hosts for M. floridensis. More extensive host range tests including weeds common to Florida are currently underway.
Database assignments for author(s): Nancy Kokalis-Burelle, Andrew P. Nyczepir
Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
