Abstract
A nonoccluded filamentous baculo-like virus occurred in scattered hypodermal and tracheal matrix cells of five species of noctuid larvae ( Spodoptera frugiperda, S. exigua, S. ornithogalli, Heliothis zea, and Trichoplusia ni) parasitized by Cotesia (= Apanteles) marginiventris. Infected cells and their nuclei were moderately hypertrophied. Infected cells contained prominent virogenic stromata, fibrous cytoplasmic inclusions, and moderate numbers of a filamentous virus. Virions were 50–98 nm in diameter, ≥865 nm in length, and straight to slightly flexuous. Nucleocapsids were 30–39 nm in diameter with a core 21–24 nm in diameter, and were enclosed by one or two envelopes. Nucleocapsids occurred in the nuclei and in the cytoplasm. Enveloped nucleocapsids were restricted to the cytoplasm.
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