Abstract
A record of outstanding results obtained for three years (1921-1923) with lime-sulphur and oils as dormant sprays for the control of the San Jose scale, Aspidiotus perniciosus Comst., Lime-sulphur did not give a sufficient kill to check the scale, which corroborated the results obtained by commercial orchardists in southern Indiana. Lime-sulphur is still an effective scale control in most sections of northern Indiana. Dry lime-uslphur was about as effective as the liquid concentrated provided it was used at one and one-half to two times the strength recommended by the manufacturers. Under conditions existing the past few years in most of southern Indiana, the oil sprays are the only ones which have given satisfactory control. These include the miscible oils, petroleum soaps, and oil emulsions. The summer use of oil emulsion cannot be recommended to take the place of a dormant spray although under certain conditions a summer application materially assists in checking scale.1
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