Fructose solution
A colorless, odorless solution with no visible crystals: the fructose 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) 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) 2015/1392 and its review report (SANCO/12680/2014, expanded): 1) apple trees, in open fields, against fruit-boring insects such as the codling moth (Cydia pomonella), foliar spraying from BBCH stage 6 (spring) to BBCH stage 65 (full bloom); 2) grapevine, against downy mildew (Plasmopara viticola), BBCH 10–57, and against the golden flavescence leafhopper (Scaphoideus titanus), BBCH 17–57; 3) corn, against the corn leaf blight fungus (Scutigerella immaculata), seed row treatment or foliar spraying at BBCH 12–14. Approved only as an elicitor of plant defense mechanisms.
Dose: Always 10 g of fructose per hL (0.1 g/L). Apple trees: 600–1,000 L of spray mixture per hectare, or 60–100 g/ha per application; 5 to 7 applications spaced 21 days apart; maximum 100 g/ha per application. Grapevine (downy mildew): 100–200 L/ha (10–20 g/ha), up to 12 applications spaced 15 days apart. Grapevines (leafhoppers): 150 L/ha (15 g/ha), 3 applications spaced 7 days apart. Corn: seed row application 40 L/ha (4 g/ha), 1 application; foliar application 82 L/ha (8.2 g/ha), 2 applications (BBCH 12–13 and BBCH 14).
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