First Report of Fusarium Root and Stem Rot Caused by Fusarium oxysporum f. sp. radicis-cucumerinum on Greenhouse Cucumbers in Saudi Arabia.

Cucumber (Cucumis sativus L.) is an important vegetable crop in Saudi Arabia. During May 2018, 45 - 60% of 5-month-old cucumber plants showed symptoms of a previously unknown wilt in commercial greenhouses around Al Kharj area of Riyadh region.