Bayer Launches Provost Opti Fungicide Jun 15, 2016 | Agrochemicals, News Your subscription level does not currently cover this area of our services. Please contact us to find out how to gain access. Username or E-mail Password * Remember Me Forgot Password Tags: Bayer, Fruit and Vegetables, Fungicides, North America, Product Introductions, prothioconazole, tebuconazole, USA