Disease Note.

First Report of Columbia Lance Nematode (Hoplolaimus columbus) on Cotton in Alabama. W. S. Gazaway, Department of Plant Pathology. Auburn University, Auburn, AL 36849. B. Armstrong, Department of Plant Pathology. Auburn University, Auburn, AL 36849. Plant Dis. 78:640. Accepted for publication 29 January 1994. Copyright 1994 The American Phytopathological Society. DOI: 10.1094/PD-78-0640A.

Columbia lance nematode {Hoplolaimus columbus Sher), long considered a serious obstacle to cotton {Gossypium hirsutum L.) production in the coastal plains of South Carolina, North Carolina, and Georgia, was found October 1992 in three cotton fields in Autauga County, Alabama. The River Trussell field, soil type McQueen silt loam, had the highest Columbia lance nematode population densities (284/100 cm3 of soil). Cotton in this field was severely stunted in several areas of the field and suffered approximately 20% yield losses. Relatively low Columbia lance nematode population densities (4/100 cm3 of soil) were detected in the two other cotton fields. Cotton in these two fields was only slightly stunted in a few small spots, and there was no detectable decline in yield. Species identification was confirmed by M. Noffsinger, N & A Nematode Identification Service. Davis, California, on the basis of the morphology of adult females.