Host Defense Inducers

This chapter addresses synthetic plant protection products, acibenzolar- S -methyl, probenazole, tiadinil, isotianil, fosetyl-aluminum, and dichlobentiazox, that induce host defense reactions against phytopathogens. Synthetic route, activity spectrum, and induction of systemic acquired resistance are described for each active substance along with selected biochemical studies and a short historical overview. At the end, we emphasize the importance of this class of fungicides for future agriculture stressing their low risk for resistance development and low environmental impact.