Diluted milk whey (whey)

A slightly cloudy, yellowish-white liquid with a milky odor. Once dry, a thin film may remain visible on the leaves. The spray mixture does not keep well. Results are not guaranteed: they depend on the preparation, the time of application, and local conditions.

Application

When to use: Routinely and occasionally

Opportunist: Powdery mildew (Fungus)

⚠ Warning: the associations between recipes and opportunists come from other references (traditional practices, publications, user feedback). They are neither a recommendation nor a claim of effectiveness. There is no certainty regarding the preparation, application and use of these bio-preparations. See the regulations

Application description: Use approved by Implementing Regulation (EU) 2016/560 and its review report (with subsequent extension): fungicide against powdery mildew. Cucumber and zucchini: powdery mildew, from BBCH 19 through BBCH 49. Grapevine: powdery mildew, in the spring, from budbreak until cluster closure. The extension also adds the disinfection of gloves and pruning tools against viruses (by immersion), which requires a powdered serum containing at least 80% protein.

Dose: 0.6–3 L of whey per hL; 1,000–1,500 L of spray mixture per hectare for cucurbits (6–30 L of whey per hectare per application). Cucumbers and zucchini: 3–5 applications, every 7 days. Grapevines: every 7–10 days, 6–30 L of whey per hectare. Disinfection: soak gloves for 5 seconds and tools for 5 minutes (dilution: as specified in the test report).