Temporal Increase and Spatial Distribution of Sugarcane Yellow Leaf and Infestations of the Aphid Vector, Melanaphis sacchari

Yellow leaf, caused by Sugarcane yellow leaf virus (ScYLV), is a potentially important disease of sugarcane first found in Louisiana during 1996. A survey during 2002 determined that ScYLV infection was present in all sugarcane-production areas of Louisiana. Virus was detected in 48% of 42 fields, a...

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Veröffentlicht in:Plant disease 2008-04, Vol.92 (4), p.607-614
Hauptverfasser: McAllister, C.D, Hoy, J.W, Reagan, T.E
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description Yellow leaf, caused by Sugarcane yellow leaf virus (ScYLV), is a potentially important disease of sugarcane first found in Louisiana during 1996. A survey during 2002 determined that ScYLV infection was present in all sugarcane-production areas of Louisiana. Virus was detected in 48% of 42 fields, and incidence averaged 15% in these fields. Disease progress curves determined in four fields during two growing seasons indicated that the greatest temporal increase of virus infection occurred during late spring and early summer and coincided with the initial infestation and increase of the virus vector, the sugarcane aphid (Melanaphis sacchari). Aphid infestations in the experimental fields during 2002 and 2003 ranged from 1.2 to 33.0 and 1.0 to 4.2 aphids per leaf, respectively. Final disease incidences of 2.9, 5.2, and 5.2% were recorded in three fields planted with virus-free seed-cane. Distribution of ScYLV infections and aphids evaluated with spatial autocorrelation analysis indicated that ScYLV and its aphid vector both exhibited a predominantly random spatial distribution, with occasional aggregation. The low incidence and rates of disease increase observed, despite the widespread occurrence of potential vectors, suggest that inoculum pressure remains low in Louisiana. Therefore, it may be possible to keep yellow leaf at low levels by planting virus-free seed-cane.
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A survey during 2002 determined that ScYLV infection was present in all sugarcane-production areas of Louisiana. Virus was detected in 48% of 42 fields, and incidence averaged 15% in these fields. Disease progress curves determined in four fields during two growing seasons indicated that the greatest temporal increase of virus infection occurred during late spring and early summer and coincided with the initial infestation and increase of the virus vector, the sugarcane aphid (Melanaphis sacchari). Aphid infestations in the experimental fields during 2002 and 2003 ranged from 1.2 to 33.0 and 1.0 to 4.2 aphids per leaf, respectively. Final disease incidences of 2.9, 5.2, and 5.2% were recorded in three fields planted with virus-free seed-cane. Distribution of ScYLV infections and aphids evaluated with spatial autocorrelation analysis indicated that ScYLV and its aphid vector both exhibited a predominantly random spatial distribution, with occasional aggregation. 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A survey during 2002 determined that ScYLV infection was present in all sugarcane-production areas of Louisiana. Virus was detected in 48% of 42 fields, and incidence averaged 15% in these fields. Disease progress curves determined in four fields during two growing seasons indicated that the greatest temporal increase of virus infection occurred during late spring and early summer and coincided with the initial infestation and increase of the virus vector, the sugarcane aphid (Melanaphis sacchari). Aphid infestations in the experimental fields during 2002 and 2003 ranged from 1.2 to 33.0 and 1.0 to 4.2 aphids per leaf, respectively. Final disease incidences of 2.9, 5.2, and 5.2% were recorded in three fields planted with virus-free seed-cane. Distribution of ScYLV infections and aphids evaluated with spatial autocorrelation analysis indicated that ScYLV and its aphid vector both exhibited a predominantly random spatial distribution, with occasional aggregation. 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Psychology</topic><topic>inoculum density</topic><topic>insect pests</topic><topic>insect vectors</topic><topic>Melanaphis</topic><topic>Melanaphis sacchari</topic><topic>Phytopathology. Animal pests. Plant and forest protection</topic><topic>plant diseases and disorders</topic><topic>plant pests</topic><topic>plant viruses</topic><topic>Plant viruses and viroids</topic><topic>population dynamics</topic><topic>Saccharum officinarum</topic><topic>spatial distribution</topic><topic>sugarcane</topic><topic>Sugarcane yellow leaf virus</topic><topic>temporal variation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>McAllister, C.D</creatorcontrib><creatorcontrib>Hoy, J.W</creatorcontrib><creatorcontrib>Reagan, T.E</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Virology and AIDS Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Plant disease</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>McAllister, C.D</au><au>Hoy, J.W</au><au>Reagan, T.E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Temporal Increase and Spatial Distribution of Sugarcane Yellow Leaf and Infestations of the Aphid Vector, Melanaphis sacchari</atitle><jtitle>Plant disease</jtitle><addtitle>Plant Dis</addtitle><date>2008-04-01</date><risdate>2008</risdate><volume>92</volume><issue>4</issue><spage>607</spage><epage>614</epage><pages>607-614</pages><issn>0191-2917</issn><eissn>1943-7692</eissn><coden>PLDIDE</coden><abstract>Yellow leaf, caused by Sugarcane yellow leaf virus (ScYLV), is a potentially important disease of sugarcane first found in Louisiana during 1996. 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source EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection; American Phytopathological Society Journal Back Issues
subjects Aphididae
Biological and medical sciences
disease incidence
disease-free plants
Fundamental and applied biological sciences. Psychology
inoculum density
insect pests
insect vectors
Melanaphis
Melanaphis sacchari
Phytopathology. Animal pests. Plant and forest protection
plant diseases and disorders
plant pests
plant viruses
Plant viruses and viroids
population dynamics
Saccharum officinarum
spatial distribution
sugarcane
Sugarcane yellow leaf virus
temporal variation
title Temporal Increase and Spatial Distribution of Sugarcane Yellow Leaf and Infestations of the Aphid Vector, Melanaphis sacchari
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