Poster Session: Biology and Disease Management - Chemical Control
232-P
Oxathiapiprolin, a new fungicide active ingredient for control of diseases caused by Oomycetes.
P. KUHN (1), A. Tally (1), B. Druebbisch (1)
(1) Syngenta Crop Protection, LLC, Greensboro, NC, U.S.A.
Oxathiapiprolin is a new fungicide active ingredient (a.i.) that provides excellent control of economically important diseases caused by downy mildews, Phytophthora species, and Pythium ultimum. The mode of action is novel and mediated via interaction with an oxysterol binding protein, with an essential, but as yet uncharacterized, function. Oxathiapiprolin has been assigned FRAC Code U15. The high intrinsic activity of the molecule enables foliar a.i. use rates that are 10-100 times lower than commercially available Oomycete fungicides. Oxathiapiprolin has been shown to exhibit translaminar efficacy, and to provide protection to expanding leaves and the developing canopy. Similarly, it gives systemic disease control following soil drench application. With high potency and a single site mode of action, there is the potential for development of reduced sensitivity or resistance to oxathiapiprolin. In order to mitigate this possibility, label directions will incorporate strict stewardship guidelines on application régimes as well as products containing two modes of action. Federal registration of oxathiapiprolin is anticipated during the second half of 2015, with launch early in 2016. The first wave of crops to be registered will include potatoes, leafy vegetables, tobacco, cucurbits, and fruiting vegetables.