An Epiphytotic of Leveillula taurica on Tomatoes in Utah. S. V. Thomson, Associate Professor, Department of Biology, Utah State University, Logan 84322. W. B. Jones, Graduate Research Associate, Department of Biology, Utah State University, Logan 84322. Plant Dis. 65:518-519. Copyright 1981 American Phytopathological Society. DOI: 10.1094/PD-65-518.

The Oidium state of Leveillula taurica was identified in 1980 on fresh market and processing tomatoes and chili peppers in Utah. Perithecia of Leveillula were found on dry tomato foliage in a Nevada greenhouse in the spring of 1981. At least 100 ha was involved throughout the major tomato-growing areas. The primary outbreaks occurred on transplanted tomatoes shipped into Utah from Nevada and Florida. Secondary outbreaks were common late in the year on all tomato varieties grown throughout the state.

Keyword(s): Oidiopsis taurica (Lév.) Salm., Oidium taurica Link 1824.