Introduction of broad-spectrum fungicides for powdery mildew control

Date or time period: 1961

Mancozeb was introduced in 1961 as a more effective control measure for downy mildew and anthracnose, and the first broad-spectrum systemic foliar fungicides became available shortly after: benzimidazoles (thiabendazole in 1964, benomyl in 1968, and thiophanate-methyl in 1970). They had advantages of low application rates, post-infection activity and extended spray interval. They were popular but the first case of resistance to powdery mildew was reported in 1969