Sucrose (sugar) solution
A colorless, odorless solution that leaves no residue: the sugar must be completely dissolved. No visible changes are expected on the plants immediately after application. Results are not guaranteed: they depend on the preparation, the time of application, and local conditions.
When to use: Routinely
Opportunist: Downy mildew (Fungus) Codling moth (Larva) European corn borer (Larva) Flavescence dorée leafhopper (Insect)
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) No. 916/2014 and its review report (with the 2020 extension): stimulator of the plant’s natural defenses (indirect action). Apple: codling moth (Cydia pomonella), BBCH 6–89. Corn and sweet corn: European corn borer (Ostrinia nubilalis). Grapevine: downy mildew (BBCH 10–57) and the leafhopper vector of golden flavescence (BBCH 17–57), outside of mandatory control measures.
Dose: 10 g/hL. Apple trees: 600–1,000 L/ha (60–100 g/ha), 7–10 applications every 15 days (French list) or every 7–10 days (other source); pre-harvest interval: 15 days. Corn: 200 L/ha (20 g/ha), 3–4 applications every 15 days. Grapevine (leafhopper): 150 L/ha (15 g/ha); pre-harvest interval: 7 days. Grapevines (downy mildew): 100–200 L/ha (10–20 g/ha), up to 2 applications.
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