questions: query regarding how to prepare the bordeaus mixture solution.  
 answers: please mix 100 gram of copper sulphat (tutia) in 5 liter of water in a plastic container and 100 gram lime powder in 5 ml of water in a different container. take another container tie a mushlin cloth on it, pour both the solution together from the above into the 3rd containter.  the mixture is to be tested before use for the presence of free copper which is toxic to the plant. dip a polished knife in the mixture. if the blade shows a reddish colour add more lime to the mixture till the blade does not show staining on dipping.