Critical timing for application of pruning wound protectants for control of grapevine trunk diseases

Research funded by Wine Australia has shown that application of fungicides to grapevine pruning wounds on the day of pruning can prevent or reduce infection by trunk disease pathogens. This article reports on the curative and preventative properties of three fungicides when applied to wounds. Fungicides can be effective when applied up to six days after infection and can protect wounds up to 14 days after application. This information provides greater flexibility for post-pruning trunk disease management.