During a year-round survey on the occurrence of powdery mildew on greenhouse-cultivated tomato plants, the disease was most severe in June and July. All tomato plants (45 commercial cultivars and 11 breeding lines) tested were infected with the pathogen but had different degrees of susceptibility. The pathogen was epiphytic and produced white, round pustules mainly on leaves of tomato plants. The pathogen produced conidia singly on conidiophores and forked appressoria on inoculated tomato leaves and seemed to be an Oidium sp. of Erysiphe polygoni type.
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Received 18 December 2000/ Accepted in revised form 22 July 2001
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MATSUDA, Y., KASHIMOTO, K., TAKIKAWA, Y. et al. Occurrence of New Powdery Mildew on Greenhouse Tomato Cultivars. J Gen Plant Pathol 67, 294–298 (2001). https://doi.org/10.1007/PL00013034
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DOI: https://doi.org/10.1007/PL00013034