Occurrence, Population Density, and Distribution of Root-Lesion Nematodes, Pratylenchus Spp., in the Sultanate of Oman

摘要

Surveys were conducted in Batinah, Dhahira, Interior, Jabal Akhdar, and Sharqia regions and Dhofar and Musandam governorates of the Sultanate of Oman during cropping seasons from 1990-97, to study the occurrence, population density, and distribution of root-lesion nematodes. Twelve species of Pratylenchus were recorded in association with 31 plant families that included 21 vegetable crops, 19 tree fruit crops, 16 field crops, two ornamentals and 14 weeds. Eleven known species of Pratylenchus are reported in the country for the first time. Among them P. jordanensis was the most frequently observed nematode species occurring in association with 37 crops and 14 weed species and found widely distributed in all the regions. Pratylenchus neglectus was the second most frequently recorded species in association with 24 plant species. Pratylenchus brachyurus, P. coffeae, P. scribneri, and P. zeae were the other economically important nematode species observed in the country.