Question: asking about control measure of anthracnose of arecanut
Answer: told her to spray bordeaux mixture: dissolve 100 gram of powdered copper sulphate in 5 litres of water in a plastic bucket and dissolve 100 gram of quick lime in 5 litres of water. then mix the two components in another bucket. the mixture is to be tested before use for the presence of free copper. dip a knife in the mixture and if the blade shows a reddish colour add more lime to the mixture till the blade does not show staining on dipping.