Isotianil is a plant defense inducer that has no direct antimicrobial effect but instead activates typical plant defense responses. Isotianil can be used as a plant protection agent for controlling rice blast.
Isotianil (0.1-100 ppm, 2 days) can induce the accumulation of endogenous plant resistance-related enzymes such as lipoxygenase, phenylalanine ammonia lyase and chitinase in rice tissues. Induction of disease resistance-related genes, including WRKY45[1].Isotianil has a good preventive effect on leaf blast at a lower dose, and has shown plant resistance induction against various bacterial diseases, including bacterial seedling rot caused by Burkholderia[1].Isotianil effectively protects seedling wheat plants against the virulent MoT isolate BR32, preventing the invasive growth of MoT from progressing from the initially attacked epidermal cells to the mesopll[2].
References:
[1]. Ogawa M, Kadowaki A, Yamada T, et al. Applied development of a novel fungicide isotianil (STOUT)[J]. Sumitomo Kagaku, 2011, 1: 1-15. [2]. Katharina Portz, et al. Wheat blast caused byMagnaporthe oryzaepathovarTriticumis efficiently controlled by the plant defence inducer isotianil.Journal of Plant Diseases and Protectionvolume128,pages249-259 (2021).