(Clockwise from upper right): Apple mosaic virus infecting strawberry (courtesy I. E. Tzanetakis, see page 431); powdery mildew on onion caused by Leveillula taurica (courtesy S. K. Mohan, see page 431); Plectosporium blight of pumpkin caused by Plectosporium tabacinum (courtesy T. A. Zitter, see page 432); apothecia of Monilinia vaccinii-corymbosi on blueberry (courtesy P. S. Wharton, see page 397).

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