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Epidemiology and management of kava dieback caused by cucumber mosaic cucumovirus

Davis, Richard I. and Brown, John F. (1996). Epidemiology and management of kava dieback caused by cucumber mosaic cucumovirus. Plant Disease,80(8):917-921.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 3 times in Scopus Article | Citations

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Title Epidemiology and management of kava dieback caused by cucumber mosaic cucumovirus
Author Davis, Richard I.
Brown, John F.
Journal Name Plant Disease
Publication Date 1996
Volume Number 80
Issue Number 8
ISSN 0191-2917   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-0029743044
Start Page 917
End Page 921
Total Pages 5
Place of Publication United States of America
Publisher American Phytopathological Society
Field of Research 0607 - Plant Biology
Abstract A dieback caused by cucumber mosaic cucumovirus (CMV) is the most important disease of kava (Piper meihysiicum) in the South Pacific. Investigations using the double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) showed that CMV is not entirely systemic within naturally infected plants in the field. In greenhouse tests, 4% of plants derived from apparently uninfected stems and 12 to 17% of plants derived from symptomatic stems tested positive for CMV after emergence and later developed symptoms and died. Analyses of the spatial distribution of naturally infected plants in the field indicated that epidemics are initiated from small clusters of diseased plants that rapidly expand and spread. A trend toward a uniform distribution of diseased plants follows. In two field plots monitored from the time of epidemic initiation, Lloyd’s patchiness index fell from 14 to 2 after 25 weeks in the first plot and from 42 to 6 after 24 weeks in the second. This indicated that a decrease in aggregation of diseased plants occurred. Disease management strategies are suggested based on the results of these Serological investigations and knowledge of the change in spatial pattern. The strategies are to combine the use of virus-free planting material, a roguing policy, and intercropping.
DOI http://dx.doi.org/10.1094/PD-80-0917.   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Fri, 29 Aug 2014, 20:18:45 CST by Anthony Hornby