Control measure for pepper diseases during raining seasons

[FarmTech]

The 1:1 to 1:18 coppersulphate mixing  ratio is not clear.. I think i can get cuso4 salt directly from chemical shops or pls explain better

Ok here is a simpler explanation: To make 1% burgundy mixture,
1. measure out 100g copper sulphate (CuSO4) and mix it in 5L of water.
2. measure out 125g of washing soda and mix in 5L water.
3. Slowly add the washing soda solution into the CuSO4 solution while stirring.
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To make 0.5% mix, use 50g CuSO4 in 5L water and 62.5g washing soda in 5L water.
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Start with the 0.5% mix and then later switch to the 1% mix. One good thing about this fungicide is that it stick to leaves strongly and rain will find it very difficult to wash out. Don't combine it in the same tank with other pesticides because of incompatibility. Use it before disease appear because it is a contact fungicide.
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Have you destroyed those peppers with viral symptoms?