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Ultrastructural and serological analyses provide evidence that a midgut barrier underlies the inability of adult western flower thrips (WFT), Frank-liniella occidentalis, to acquire tomato spotted wilt virus (TSWV) through adult feeding on infected plants. As demonstrated for other thrips vector species, only WFT that acquire TSWV as larvae can successfully inoculate plants with the virus as adults. Transmission electron microscopy (TEM) observations and serological results demonstrate that larval and adult WFT ingest TSWV particles during feeding on infected plants, after which virions can be found within the midgut lumen and epithlial cells (...)
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Diane E. Ullman (1992) studied this question.
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