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Successful management of colletotrichum crown and stolon rot in runner production in sub-tropical Australia

Hutton, D. (2006) Successful management of colletotrichum crown and stolon rot in runner production in sub-tropical Australia. Acta Horticulturae, 708 . pp. 293-298.

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Crown, stolon, and petiole rots caused by Colletotrichum gloeosporioides (C.g.) were first identified in runner beds of the Queensland Approved Runner Scheme (QARS) in February 1989. The outbreaks occurred annually from 1990 to 1994. Minor losses in subsequent fruit crops occurred from 1990 to 1993, with 50% post-establishment losses occurring on fruit farms in southeast Queensland in 1994. The objective of this work was to provide a control strategy for the disease that would give stability to the QARS. Runner-bed trials in 1993-1994 showed that Octave® (462 g/kg prochloraz as the MnCl2 complex) was highly effective in reducing the incidence field symptoms and laboratory recovery of C.g. from symptomless petioles. A simple detached petiole laboratory test for measuring fungicide efficacy in runner bed trials and for laboratory screening of fungicides, is described. Scheme protocols were changed to require that only foundation plants from tissue culture were allowed onto QARS sites. These were to be symptomless and to have tested negative for the presence of C.g. The application of Octave® at fortnightly intervals in all QARS nurseries has reduced the level of visible symptoms and the laboratory recovery of C.g. from symptomless petioles to almost zero.

Item Type:Article
Corporate Creators:Horticulture and Forestry Science
Additional Information:© International Society for Horticultural Science.
Keywords:Crown rot; Colletotrichum gloeosporioides; fungicides; prochloraz; integrated disease management.
Subjects:Plant pests and diseases > Individual or types of plants or trees
Plant culture > Fruit and fruit culture
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Live Archive:20 Feb 2009 06:09
Last Modified:03 Sep 2021 16:48

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