Articles
WEED HOSTS AND THRIPS TRANSMISSION OF TOMATO SPOTTED WILT VIRUS IN LOUISIANA
Article number
431_25
Pages
291 – 297
Language
Abstract
Among the most commonly infected weed hosts of tomato spotted wilt virus (TSWV) in Louisiana are two species of the Compositae, Sonchus asper and Lactuca floridana, and a member of the Ranunculaceae, Ranunculus sardous. Some individual plants of each species were infected with TSWV in winter and early spring months prior to infection in tomato and pepper fields. Frankliniella fusca was the thrips species most commonly associated with these hosts.
Some F. fusca adults collected from R. sardous plants in the field transmitted TSWV to tomato plants on which they were caged in the laboratory. F. fusca was the only thrips species whose population abundance was significantly correlated with TSWV incidence at different locations in Louisiana.
In laboratory experiments with five thrips per test plant, F. fusca was able to transmit TSWV from the three weed hosts to S. asper and bell-pepper plants.
The results indicate that F. fusca can acquire TSWV from the three weed species in the field and transmit it to pepper, tomato, and other hosts.
Some F. fusca adults collected from R. sardous plants in the field transmitted TSWV to tomato plants on which they were caged in the laboratory. F. fusca was the only thrips species whose population abundance was significantly correlated with TSWV incidence at different locations in Louisiana.
In laboratory experiments with five thrips per test plant, F. fusca was able to transmit TSWV from the three weed hosts to S. asper and bell-pepper plants.
The results indicate that F. fusca can acquire TSWV from the three weed species in the field and transmit it to pepper, tomato, and other hosts.
Authors
H.A. Hobbs, R.R. Johnson, R.N. Story, L.L. Black
Keywords
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