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Field assessment of avocado rootstock selections for resistance to Phytophthora root rot.

Smith, L.A. and Dann, E.K. and Pegg, K.G. and Whiley, A.W. and Giblin, F.R. and Doogan, V. and Kopittke, R. (2011) Field assessment of avocado rootstock selections for resistance to Phytophthora root rot. Australasian Plant Pathology, 40 (1). pp. 39-47.

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Article Link(s): http://dx.doi.org/10.1007/s13313-010-0011-0

Publisher URL: http://www.springerlink.com

Abstract

Phytophthora root rot (PRR), caused by P. cinnamomi, is a primary constraint on avocado productivity in Australia. Numerous field trials at sites in northern NSW and southern QLD have demonstrated significant variation in tree health amongst commercial rootstocks and recently selected material, grown under high PRR disease pressure. Selections 'SHSR-02', 'SHSR-04', ungrafted 'Hass' (rooted cuttings from clonal propagation) and the commercial rootstock 'DusaTM' were significantly healthier over time than other rootstocks, many of which died during the course of the trials. 'Reed' was consistently highly susceptible. In many cases superior tree health was associated with increased tree height and trunk girth. The trials also clearly demonstrate the negative impact of Phytophthora root rot on establishment of new avocado production blocks, and the importance of identifying and selecting avocado rootstock material that can withstand high P. cinnamomi disease pressure.

Item Type:Article
Business groups:Agri-Science, Crop and Food Science
Additional Information:© Australasian Plant Pathology Society Inc.
Keywords:Avocados; clones; cuttings; field experimentation; field tests; fruit growing; health; height; plant breeding; plant diseases; plant pathogenic fungi; plant pathogens; productivity; propagation; resistance; root rots; rootstocks; susceptibility; tree classes; Australia.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Organic plant protection. Biological control
Plant pests and diseases > Individual or types of plants or trees
Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit > Stonefruit
Deposited On:31 Mar 2011 06:59
Last Modified:26 Oct 2011 02:15

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