“…Phosphite does not kill or eradicate Phytophthora species but suppresses the pathogen's activity while simultaneously boosting the plant's natural defense responses, at concentrations in planta that only partially inhibit pathogen growth in vitro (Smille et al , Hardy et al , Wilkinson et al ). Phosphite has had successful use in the management of Phytophthora diseases in agriculture, forestry and natural ecosystems, in Europe (Fernandez‐Escobar et al ), United States (Garbelotto et al ), Australia (Ali et al , Barrett et al , Shearer et al , ) and New Zealand (Reglinski et al , Horner and Hough , Rolando et al ). In field applications, foliar phosphite treatment has also been shown to directly reduce the rate of spread of Phytophthora pathogens within naturally infested, florally diverse ecosystems (Shearer et al ), and is a valuable tool in the containment and quarantine response to new Phytophthora incursions (Hardy et al ).…”