Abstract
Transmission electron microscopy was used to observe viruslike particles (VLP) in thin sections of the foreguts of leafhoppers previously fed on maize plants infected with the semipersistently transmitted maize chlorotic dwarf virus (MCDV). The VLP, of size and shape similar to that of MCDV virions, were found embedded in a semiopaque matrix attached to the cultivar intima of the pharynx, cibarium, and precibarium and occasionally to the inner surface of the maxillary food canal in three cicadellid vector species (Graminella nigrifrons, G. sonora, and Amblysellus grex) and in the nonvector cicadellid Dalbulus maidis; they were not found in the nonvector delphacid Peregrinus maidis (...)
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