Question: asking about control of antracnose spot in betel vine
Answer: told him spray bourdeaux  mixture. 100 g of copper sulphate powder is dissolved in 1 litres of water. similarly, 100g of lime is powdered and dissolved in another 1 litres of water. then copper sulphate solution is slowly added to lime solution with constant stirring or alternatively, both the solutions may be poured simultaneously to a third contained and mixed well.