Volume 72: Macarthur family correspondence relating to wine, 1846-1900: No. 095
"it has ben stated that it can be cured or prevented by a solution of the higher Sulphides of Calcium. Vines washed with this Solution continued to flourish, while others, purposely left untouched suffered severely".
Believing your brother to be in the other hemisphere I have addressed you
C: A: Plaistowe