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Ons according to observations of male occurrence had been BIM-22493 chemical information reported in Japan. The rare- male type (MRT) showed that rare or really modest numbers of male occurred. The absent-male form (MAT) indicated only females have been detected and males absent. Herein these three sorts of reniform nematode have been also discovered in Hainan Island, China. Thus, this study attempted to clarify any distinction within the morphological variations of this nematode within these three biological kinds. The morphological data of R. reniformis populations in the present study have been compared with preceding research and inside 3 forms. The morphometrics of immature females and males were similar to those from the identical hosts inside the published records, except a shorter tail length was identified in this research. The MNT occurred at the highest frequency (62.five ), followed by the MRT (25 ) and MAT (12.5 ). Molecular techniques will likely be applied to discern the genetic variation of reniform nematodes in 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, Department of Plant Pathology and Crop Physiology, Baton Rouge, LA 70803. A survey was conducted 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 been sampled. A total of 11 nematode genera have been identified from soil and root samples of St. Augustine lawns;Meeting Abstracts 485 Criconemella have already been found 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 were identified from soil and root samples of centipede lawns; Criconemella happen to be found in 100 , Helicotylenchus in 88 , Hoplolaimus in 35 , Meloidogyne in 35 , Pratylenchus in 82 , Scutellonema in 1 , Trichodorus in 12 , Tylenchorhynchus in 18 , Tylenchus in 100 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 of your soils from St. Augustine lawns ranged from 5.1 to six.9, with an typical of six.two. Centipede soil pH ranged from 6.1 to 7.3, with an typical of six.five. Percent soil moisture ranged from 7.7 to 25 with an average of 17.four for St. Augustine and from five.8 to 20.six with an typical of 15.four for centipede. Soil temperatures for the duration of the summer time ranged from 26.48C to 34.38C, having a sharp decline to 208C within the fall. Making use of the soil hydrometer strategy of soil classification, types range from clay (50 + clay content) to sandy clay loam (60 sand, 13 clay, 26 silt), to silt loam (ten sand, 11 clay, 79 silt), with the average becoming loam (30 sand, 20 clay, 50 silt). Essentially the most prevalent nematodes, ring, spiral, stunt, and lesion, happen to be isolated and established in axenic cultures for use in greenhouse pathogenicity trials.