Oak mildew - possibilities of its control
Soukup, F.(Vyzkumny Ustav Lesniho Hospodarstvi a Myslivosti, Jiloviste-Strnady (Czech Republic))E-mail:[email protected]
New possibilities of oak mildew (Microsphaera alphitoides) control were tested and compared with present methods. The results of three-year experiments in 6 localities clearly showed that the sulphur-based fungicides (Sulikol K, Sulka) had a relatively good and stable effectiveness, and that two other newly tested preparations (Systhane 12 EC, Amistar) were even more effective when the percentage of infested plants did not exceed 2% (Systhane 12 EC) or 5% (Amistar). The biopreparations with fungicidal or fungistatic effects such as Supresivit, Polyversum and Ibefungin as well as the preparation PFR were not efficient in oak mildew control. Testing of Bion 50 WG and Neem Triact 90 EC gave interesting and promising results. They were not only effective in controlling the disease but had also a positive influence on the general plant health, which could compensate their economic disadvantage in comparison with classical fungicides.
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