questions: farmer asking query regarding control of ganoderma wilt in arecanut. 
 answers: one kg of copper sulphate powder is dissolved in 50 litres of water. similarly, 1 kg of lime is powdered and dissolved in another 50 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 container and mixed well.