Question: asking about control measure of phytophthora leaf and root rot of betelvine
Answer: told him to apply  bordeaux mixture thrice at 15 days interval in  a ring across the tree. dissolve 100 gram copper sulphate in 5 litres of water in a plastic bucket and add 100 gram lime in 5 litres of water in another bucket. then mix both the component to give a final volume of 10 litres.