RESOLUTION OENO 10/97

LYSOZYME TREATMENT

THE GENERAL ASSEMBLY,

AFTER HEARING the works of the expert group « International Code of Oenological Practices »,

DECIDES:

ON THE PROPOSAL of Commission II « Oenology », to include in the « International Code », the following definition:

PART II

Chapter 3: Wines

Lysozyme treatment

Definition:

Addition of lysozyme to the must.

Objectives:

1. Control of the growth and activity of the bacteria responsible for malolactic fermentation of the must.
2. Reduction of the rate of sulphur dioxide.

Prescriptions:

1. According to experiments, the maximum dose of 500 mg/l appears to be sufficient to control the growth and the activity of the bacteria responsible for malolactic fermentation.
2. Lysozyme cannot totally substitute itself to which possesses antioxidant properties. A + lysozyme association provides more stable wines.
3. When must and wine are treated with lysozyme, the cumulative dose must  not exceed 500mg/l.
4. The product must conform to the prescriptions of the International Oenological Codex.

Recommendation of the O.I.V.:

Accepted.