Status of biological disease control in horticulture

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Abstract
Aspects of biological control of plant disease relevant to the horticultural industry are reviewed. Examples are given of modes of action based on parasitism or predation, antibiosis, competition, cross‐protection and other host‐mediated events. Other examples involve cultural control, the use of soil supplements and organic amendments. Strategies for selection and direct application of microbial antagonists are reviewed for aerial, root and growing media/soil microbiomes. Examples of biocontrol preparations that are currently available or undergoing registration are tabulated, and the potential for future development of biocontrol in the horticultural industry is briefly discussed.