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Pratylenchus Loosi From Pasture Grasses in Central Florida

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For more content, see Nematology.

Amphimictic populations of lesion nematodes with two lip annuli were detected from pasture grasses, Paspalum notatum and Panicum hemitomon, in central Florida. When cultured on carrot disks, these Pratylenchus species differed (P = 0.05) from P. coffeae cultures with respect to posterior uterine sac length (28 and 34.5 μm vs 53.5 μm), vulva % (77.5 and 77.4 vs 79.7), b (5.4 and 6.01 vs 6.4) and c (17 and 17.3 vs 21.3) ratios and shape of tail (narrowly rounded vs bluntly rounded, truncate or indented). Morphometric differences between these lesion nematode populations and P. coffeae tended to be greater when collected directly from their original hosts (grasses and citrus) than from carrot cultures. Morphological characters of Pratylenchus species from grasses were similar to those of P. loosi. The lesion nematodes from grasses, however, had females with more anterior vulva (76-79) than P. loosi paratypes (79-85) from Sri Lanka.

Affiliations: 1: Florida Department of Agriculture and Consumer Services, Division of Plant Industry, Nematol-ogy Section, Gainesville, Florida 32614-7100, USA; 2: University of Florida, IFAS, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL 33850, USA; 3: Istituto di Nematologia Agraria, CNR, Via G. Amendola 165/A, 70126 Bari, Italy; 4: Department of Nema-tology, Agricultural University, P.O. Box 8123, 6700 ES Wageningen, The Netherlands


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