|Davis, R - UNIVERSITY OF GEORGIA|
Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: June 23, 2000
Publication Date: December 1, 2000
Citation: Davis, R.F., Timper, P. 2000. Survey of nematodes associated with corn in Georgia [abstract]. Journal of Nematology. 32:26. Technical Abstract: A nematode survey of 102 corn fields was conducted in Aug 1998 and Jul and Aug 1999 in 11 counties in Georgia. Fifteen soil cores (2.5 cm x 15-20 cm deep) were collected from 1 ha sections of corn fields; all fields had been in cotton or peanut the year prior to sampling. Meloidogyne spp. juveniles extracted from soil were transferred to tomato, allowed to mature, and identified to species. Nematodes detected from soil samples, in descending order of incidence, included Pratylenchus sp. (74%), Mesocriconema sp. (58%), Helicotylenchus sp. (43%), Paratrichodorus sp. (31%), Meloidogyne incognita (30%), Tylenchorhynchus sp. (3%), M. javanica (2%), M. arenaria (2%), and Rotylenchulus reniformis (2%). In this survey, 94% of the Meloidogyne spp. extracted from soil samples were M. incognita. A mist chamber was used in 1999 to extract nematodes from root fragments collected on sieves when processing the survey's soil samples. Nematodes also were extracted from three intact corn root systems per field. Pratylenchus sp. were recovered from 89% of the root samples collected during extraction from soil; Pratylenchus sp. incidence was 100% in entire corn root systems. Soil samples underestimate both incidence and population levels of Pratylenchus sp. in corn in Georgia.