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Preparation of Bordeaux mixture (0.25%): Ingredients: 50g copper sulfate 50g of lime 20 liters of water Use two containers, one for the preparation of copper sulfate (a) and the other for lime milk (b). a) Place the copper sulfate (50g) in a cloth bag 4 to 24 hours before the start of preparation. Tie the bag to the end of a stick and dip it in + or - 2 liters of cold or warm water. b) Put the lime (50g) in 2 liters of water, mix well. Be careful not to burn the skin with the heat resulting from the reaction of the lime with the water. Before mixing the ingredients, strain the lime milk on a cloth. When mixing the ingredients, slowly pour the copper sulfate (2 liters) over the lime milk (2 liters). Do not reverse this order and always remember to paint white with blue. Use a wooden spoon to mix the sulphate, lime and the rest of the water (+ or- 16 liters). Check the acidity of the Bordeaux mixture (it should be neutral or slightly alkaline). Note: In young or flowering plants it is suggested to prepare the Bordeaux mixture with 60g of copper sulphate plus 30g of virgin lime (lower concentration of the syrup). For adult plants, prepare the Bordeaux mixture with 120g of copper sulphate plus 60g of virgin lime (higher concentration of the syrup). That is, the amounts (weight) of the ingredients (copper sulfate and lime) used for the preparation of the syrup may vary depending on the culture, climatic condition, degree of disease attack and the plant's development stage. It is advisable to carry out a test on some plants before applying them to the crops and checking that no injuries were caused by burns resulting from the application of the syrup. Cautions: Wear rubber gloves and a long-sleeved shirt when handling Bordeaux paste. Avoid contact of the syrup with the skin and eyes. Use the Bordeaux mixture immediately after preparation or within 3 days. How to apply: The syrup should be sprayed on the leaves of the plants. Apply from the vegetative phase to the fruit ripening phase, with intervals of 10 to 15 days between applications. Apply the syrup with mild temperatures (neither too hot nor too cold). Attention: The organic legislation allows to use the maximum amount of 6 kg of copper / ha / year. Certified organic producers should consult OCS or OAC, if the use of copper sulfate is not foreseen in the organic management plan of the property for the intended control. References: ManejeBem