National Geographic : 1911 Apr
A PLANT FOR PREPARING LIME-SULPHUR WASH This wash is prepared by cooking a lime and sulphur mixture with steam. The mixture is applied to trees in late winter, and is the best remedy so far found for the San Jose scale. All the large commercial orchards have their own plants for preparing this wash, which must be applied yearly to save the trees and fruit crop. A SPRAYING APPARATUS FOR APPLYING THE LIME-SULPHUR WASH IN ORCHARDS This is a winter treatment, and is the best-known means of controlling the San Jose scale. More than 5 million dollars a year are spent by fruit-growers in spraying orchards in this way. In addition, to this cost is the actual loss from the San" Jose scale itself, which very much exceeds the cost of the spray application in orchards not sprayed or imperfectly treated. A proper inspection and quarantine law would. have prevented this enormous yearly loss.