Articles
THRIPS, TOSPOVIRUS, AND HOST-PLANT ASSOCIATIONS IN A HAWAIIAN FARM ECOSYSTEM: PROSPECTS FOR REDUCING DISEASE LOSSES
Article number
431_43
Pages
477 – 482
Language
Abstract
Host plants for tomato spotted wilt virus (TSWV) were evaluated for their relative importance as virus acquisition and inoculation hosts using the thrips vector Frankliniella occidentalis.
TSWV presence was detected by double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA). In descending order of importance for efficiency of virus acquisition were: jimson weed, (Datura stramonium); romaine lettuce (Lactuca sativa var. longifolia); and burdock), (Arctium lappa). SWV transmission by F. occidentalis was more efficient in D. stramonium and golden crownbeard (Verbesina enceloides) than in L. sativa or cheeseweed (Malva parviflora). Transmission studies demonstrated the ability of F. occidentalis to initiate secondary spread of TSWV within L. sativa.
The vector also readily transmitted TSWV from L. sativa to non-crop hosts and vice versa.
F. occidentalis adults preferred to land and feed on TSWV-infected plants in choice tests, suggesting the potential to greatly influence viruliferous thrips populations.
Moreover, larval production was significantly greater on diseased plants.
Epidemiological implications of these results indicated that the importance of secondary spread of TSWV in L. sativa may have been underestimated and that the relative importance of infected non-crop hosts may be overestimated.
These findings also suggest that disease losses might be reduced if there were effective tactics to reduce the production of viruliferous thrips in cultivated crops such as L. sativa.
TSWV presence was detected by double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA). In descending order of importance for efficiency of virus acquisition were: jimson weed, (Datura stramonium); romaine lettuce (Lactuca sativa var. longifolia); and burdock), (Arctium lappa). SWV transmission by F. occidentalis was more efficient in D. stramonium and golden crownbeard (Verbesina enceloides) than in L. sativa or cheeseweed (Malva parviflora). Transmission studies demonstrated the ability of F. occidentalis to initiate secondary spread of TSWV within L. sativa.
The vector also readily transmitted TSWV from L. sativa to non-crop hosts and vice versa.
F. occidentalis adults preferred to land and feed on TSWV-infected plants in choice tests, suggesting the potential to greatly influence viruliferous thrips populations.
Moreover, larval production was significantly greater on diseased plants.
Epidemiological implications of these results indicated that the importance of secondary spread of TSWV in L. sativa may have been underestimated and that the relative importance of infected non-crop hosts may be overestimated.
These findings also suggest that disease losses might be reduced if there were effective tactics to reduce the production of viruliferous thrips in cultivated crops such as L. sativa.
Authors
R. Bautista, R.F.L. Mau, J.J. Cho, D. Custer
Keywords
Online Articles (51)