The Efficiency of Tar Distillate Sprays in Controlling San Jose Scale in 1932
Results of the second season's experiments with sprays containing coal tar distillates of English and American origin confirm the results of 1931. The higher concentrations may give control of San Jose scale ( Aspidiotus perniciosus ) comparable to that obtained with a standard petroleum oil spray of 3% oil. A combination of coal tar oil and petroleum oil against aphis eggs and scale in the dormant season is suggested.
This volume contains nine back-up essays to the study, "Analysis of Options to Limit Air Quality Degradation Due to Misuse of Leaded Gasoline in Cars Equipped with Catalytic Converters, "IDA P-1426. Thus, the essays pertain to the problem of "misfueling" which was a prominent feature of the gasoline shortage in the summer of 1979.