Host range of three isolates of Alternaria zinniae, a potential biocontrol agent for Xanthium spp. [weed]

Auld, B.A.; Talbot, H.E.; Radburn, K.B. . Agricultural Research and Veterinary Centre

Host range of three isolates of Alternaria zinniae, a potential biocontrol agent for Xanthium spp. [weed]

1992

Auld, B.A. | Talbot, H.E. | Radburn, K.B. (New South Wales Agriculture, Orange (Australia). Agricultural Research and Veterinary Centre)

Three Alternaria zinniae isolates collected from Xanthium occidentale in eastern Australia were host range tested to assess their potential for development as bioherbicides for Xanthium spp. As well as 5 Xanthium spp. 11 other Asteraceae were screened together with representatives from Cucurbitaceae, Fabaceae, Malvaceae, Myrtaceae and Poaceae. With one exception all isolates were pathogenic to all Xanthium spp. A. zinniae had a wide host range within the dicotyledons including the Cucurbitaceae; grasses were generally immune. The relative resistance of cotton to A. zinniae may indicate some scope for development of a bioherbicide based on this fungus in cotton.

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