Cherry Tomato Powdery Mildew Caused by Oidiopsis taurica (Leveillula taurica) in Egypt

Document Type : Original Article

Authors

Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig, Egypt.

Abstract

Cherry tomato variety is a new cultivar grown in Egypt recently, during October and November 2009 and 2010 growing seasons, yellow spots on lower leaves of cherry tomato plants were observed in El-Sharkia. El-Ismailia, El-Giza and Alexandria governorates, Egypt. The spots enlarge and eventually turn brown as cleared by Google, 2011 (Fig. 1. A, B, C). As infections progress, the entire leaf withers and dies but remains attached to the stem. There are no symptoms on the stems or fruits. However, with extensive loss of foliage, many exposed fruits will sunburn. Naturally infected leaves were collected to isolate and identify the pathogen. The disease and the isolated fungus were identified as cherry tomato powdery mildew caused by Oidiopsis Taurica (Leveillula taurica) (Fig. 2) and its pathogenicity was confirmed on tomato, pepper, egg-plant and potato.
Oidiopsis taurica (Leveillula taurica)conidia were reisolated from inoculated cherry tomato leaves with the same disease symptoms. The separate conidium is slender and borne on septated conidiophores which developed through the stomata of the tomato leaf. This is the first record of Oidiopsis taurica (Leveillula taurica)as the pathogen fungus of cherry tomato powdery mildew in Egypt.

Keywords

Egyptian Journal of Phytopathology
Volume 39, Issue 2
December 2011
Pages 213-214

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