questions: asking for the control measure against canker disease in lemon. 
 answers: replied that it is a bacterial disease and the control measure suggested is that to spray a mixture of streptocyclin solution @ 1 milli litre in 10 litres of water along with blitox solution @ 3 grams in 1 litre of water.also suggested to spray zinc sulphate solution @ grams in 1 litre of water during new flushes.