The rare- male form (MRT) showed that rare or incredibly smaller numbers of male occurred. The absent-male sort (MAT) indicated only females were detected and males absent. Herein these 3 types of reniform nematode had been also identified in Hainan Island, China. Consequently, this study attempted to clarify any distinction within the morphological variations of this nematode within these 3 biological sorts. The morphological information of R. reniformis populations within the present study have been compared with preceding studies and inside three kinds. The morphometrics of immature females and males were comparable to those in the same hosts in the published records, except a shorter tail length was discovered within this study. The MNT occurred at the highest frequency (62.5 ), followed by the MRT (25 ) and MAT (12.five ). Molecular techniques will likely be applied to discern the genetic variation of reniform nematodes from the different populations. THE EFFECTS OF PLANT PARASITIC NEMATODES ON ST. AUGUSTINE AND CENTIPEDE LAWNS IN LOUISIANA. Plaisance, A.R. and E.C. McGawley. Louisiana State University AgCenter, Division of Plant Pathology and Crop SCH900776 web Physiology, Baton Rouge, LA 70803. A survey was carried out to document management practices, agrichemical usage, foliar symptoms, pH, % moisture, soil texture, and plant parasitic nematode communities in urban turf ecosystems. To date, 105 lawns in East Baton Rouge Parish have already been sampled. A total of 11 nematode genera were identified from soil and root samples of St. Augustine lawns;Meeting Abstracts 485 Criconemella have already been identified in 93 , Gracilicus in 1 , Helicotylenchus in 92 , Hemicycliophora in 1 , Hoplolaimus in 1 , Meloidogyne in 64 , Pratylenchus in 31 , Scutellonema in 1 , Tylenchorhynchus in 29 , Tylenchus in 98 and Xiphinema in 21 . Respectively, typical nematode densities per 250cc of soil were 118, 20, 208, 11, 12, 51, 34, 11, 34, 128, and 11. A total of ten nematode genera had been identified from soil and root samples of centipede lawns; Criconemella have already been located in one hundred , Helicotylenchus in 88 , Hoplolaimus in 35 , Meloidogyne in 35 , Pratylenchus in 82 , Scutellonema in 1 , Trichodorus in 12 , Tylenchorhynchus in 18 , Tylenchus in one hundred and Xiphinema in 18 . Respectively, average nematode densities per 250cc of soil had been 286, 277, 22, 17, 63, 25, 9, 37,129, and 14. The pH in the soils from St. Augustine lawns ranged from 5.1 to six.9, with an typical of 6.two. Centipede soil pH ranged from six.1 to 7.3, with an average of six.5. % soil moisture ranged from 7.7 to 25 with an average of 17.4 for St. Augustine and from 5.8 to 20.six with an typical of 15.four for centipede. Soil temperatures for the duration of the summer season ranged from 26.48C to 34.38C, with a sharp decline to 208C inside the fall. Applying the soil hydrometer process of soil classification, kinds range from clay (50 + clay content material) to sandy clay loam (60 sand, 13 clay, 26 silt), to silt loam (10 sand, 11 clay, 79 silt), using the average being loam (30 sand, 20 clay, 50 silt). Essentially the most prevalent nematodes, ring, spiral, stunt, and lesion, have already been isolated and established in axenic cultures for use in greenhouse pathogenicity trials.