Effect of seaweed extract on avocado root growth, yield and post-harvest quality in far north Queensland, Australia

Abstract Seaweed extracts are proven to increase productivity in many agricultural crops, but there is limited research on their use avocado production. Therefore, we evaluated the effectiveness of a seaweed extract from Durvillaea potatorum and Ascophyllum nodosum yield, revenue post-harvest fruit quality series field experiments Australia, seedling root growth pot experiment. The were conducted commercial farms across three different locations northern Queensland over four years utilised trees with ages, cultivars (Hass Shepard) inoculum pressures Phytophthora cinnamomi . Results showed that application by fertigation significantly improved yield (kg per tree) 38%, firmness 4% (skin) 22% (flesh) skin colour 1° (hue), an upgraded visual ripeness score. increases associated greater number fruits tree (up 42%) indicating liquid set retention tree. Regular soil young (cv. Hass) pots increased fresh weight 22%. Overall, regular was found be practical economically viable for improving production Australian orchards.