Abstract
SummaryVirus transmission bait tests with single trichodorid nematodes from England, the Netherlands, Scotland or Sweden showed that a substantial degree of specificity occurs between trichodorid vector species and tobravirus serotypes. This specificity was more apparent with associations between Paratrichodorus vector species and tobravirus serotypes than with those between Trichodorus species and tobravirus serotypes. P. pachydermus transmitted PRN‐serotype tobacco rattle virus (TRV) isolates, P. teres ORE‐serotype isolates and P. anemones TRV isolates which did not react with any of the antisera used, but which could be distinguished from all other isolates by their symptomatology in Chenopodium test plants. T. viruliferus, T. primitivus and T. cylindricus transmitted RQ‐serotype isolates and the latter species also transmitted TRV isolates reacting with TCB2 and pea early‐browning SP5‐antisera. Several TRV isolates transmitted by T. cylindricus failed to react with any of the antisera used.
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