Hemicriconemoides wessoni

Zeng, Yongsan, Ye, Weimin, Tredway, Lane, Martin, Samuel & Martin, Matt, 2012, Taxonomy and morphology of plant-parasitic nematodes associated with turfgrasses in North and South Carolina, USA, Zootaxa 3452, pp. 1-46 : 25-27

Hemicriconemoides wessoni

( Fig. 6 D–F)

Measurements. See Table 13 .

Remarks. Hemicriconemoides wessoni was first documented in Alturas, Florida by Chitwood & Birchfield (1957) from around the roots of Myrica cerifera L. It has also been found in Georgia ( Dasgupta et al. 1969), Alabama (USDA collection, Beltsville), and SC ( Ye & Robbins 2000). Pinochet & Raski (1975) described H. annulatus collected from St. Augustine grass at the Crago Sod Farm (South Bay, Florida) as being closest to H. wessoni . Ye & Robbins (2000) examined several populations of H. wessoni from different geographical origins, compared them with the type specimens of H. annulatus , and found that the small differences observed in H. annulatus were within the intraspecific variation of H. wessoni , thus supporting the synonymy of these two species. They found H. wessoni in samples from creeping bentgrass in SC. In the present survey, H. wessoni was only found in association with bermudagrass fairways and tees in SC and greens, fairways and tees in NC. Bermudagrass was not previously known to be a host. Hemicriconemoides wessoni was obtained from 50 bermudagrass samples taken in 13 counties in both NC and SC. Both morphology and morphometrics fit previous descriptions ( Esser 1960; Ye & Robbins 2000). This is the first record of H. wessoni from bermudagrass, and also the first record of this nematode in NC.

and in the format: mean ± S.D. (range).

Figures

FIGURE 6. Micrographs of Hemicriconemoides chitwoodi, H. wessoni, Paratylenchus goldeni and Aphelenchoides myceliophagus from turfgrasses in NC and SC. Scale bars: A, D = 50 µm; B, C, E – M = 20 µm. A. Entire body of H. chitwoodi. B. Pharyngeal region of H. chitwoodi. C. Vulva and tail region of H. chitwoodi. D. Entire body of H. wessoni. E. Pharyngeal region of H. wessoni. F. Vulva and tail region of H. wessoni. G. Pharyngeal region of P. g o l d e n i. H. Vulva and tail region of P. goldeni. I. Pharyngeal region of A. myceliophagus. J. Vulval region of A. myceliophagus. K. Pharyngeal region of A. myceliophagus. L. Female tail of A. myceliophagus. M. Male tail of A. myceliophagus.