Breakdown of Cross-Protection of Grapefruit from Decline-Inducing Isolates of Citrus tristeza virus Following Introduction of the Brown Citrus Aphid

A 21-year-old replicated field planting of 84 'Ruby Red' grapefruit trees cross-protected with three mild isolates of Citrus tristeza virus (CTV) was assessed for decline-inducing and non-decline-inducing isolates of the virus 5 years after the brown citrus aphid (BrCA) (Toxoptera citricid...

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Veröffentlicht in:Plant disease. - 1997. - 87(2003), 9 vom: 20. Sept., Seite 1116-1118
1. Verfasser: Powell, C A (VerfasserIn)
Weitere Verfasser: Pelosi, R R, Rundell, P A, Cohen, M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2003
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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245 1 0 |a Breakdown of Cross-Protection of Grapefruit from Decline-Inducing Isolates of Citrus tristeza virus Following Introduction of the Brown Citrus Aphid 
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520 |a A 21-year-old replicated field planting of 84 'Ruby Red' grapefruit trees cross-protected with three mild isolates of Citrus tristeza virus (CTV) was assessed for decline-inducing and non-decline-inducing isolates of the virus 5 years after the brown citrus aphid (BrCA) (Toxoptera citricida Kirkaldy) first was established in the experimental area. Prior to the introduction of the BrCA, the cross-protecting mild isolates had significantly reduced detectable infection with decline-inducing isolates of CTV for 16 years (average infection of 13% in cross-protected trees compared with 67% in unprotected trees). After the introduction of the BrCA, infections with decline-inducing CTV (measured by enzyme-linked immunosorbent assay) were 57, 81, and 71% for trees protected with three mild isolates, respectively, compared with 95% in unprotected trees. These results suggest that the introduction of BrCA accelerated the breakdown of cross-protection against decline-inducing isolates of CTV in grapefruit 
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700 1 |a Rundell, P A  |e verfasserin  |4 aut 
700 1 |a Cohen, M  |e verfasserin  |4 aut 
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