Occurrence of Fusarium oxysporum f. sp. cucumerinum on Greenhouse-Grown Cucumis sativus Seed Stocks in North Carolina. S. F. Jenkins, Jr., Professor, Department of Plant Pathology, North Carolina State University, Raleigh 27650. T. C. Wehner, Assistant Professor, Department of Horticultural Science, North Carolina State University, Raleigh 27650. Plant Dis. 67:1024-1025. Accepted for publication 24 March 1983. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-1024.

Fusarium wilt of cucumber (Cucumis sativus) occurred in a greenhouse used to increase seed stocks. The causal organism was isolated from the stems, peduncles, fruit, and seed of plants growing in the greenhouse and also from seed of three of 88 plant introduction (PI) lines tested later. Monoconidial isolates from both the infected plants growing in the greenhouse and seed of the three PI lines were identified as Fusarium oxysporum f. sp. cucumerinum race 1. Inoculation of race 1-susceptible cultivars MSU 9519, Chipper, and Ashley resulted in wilt, but inoculation of race 1-resistant PI 390265 did not result in wilt.