Non-fungicidal control strategies for Phytophthora cinnamomi root rot of avocado

While fungicides may be a major mechanism for control of avocado root rot, integrated management requires several other non-fungicidal approaches which are used together to maximize root rot control. Non-fungicidal methods of control include planting clean avocado nursery stock, selecting low hazard sites, planting on mounds in more hazardous sites, preventing the introduction of P. cinnamomi, using resistant rootstocks, preventing overor under-irrigation, treating with gypsum and the addition organic mulches. It appears that avocados can survive and grow in the presence of P. cinnamomi if this management scheme is practiced.