282 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 15 



ard miscible oil and liquid-concentrate lime-sulphur were used in 

 comparison with several brands of dry lime-sulphurs, and at least 

 four trees were treated with each material. The regular summer 

 sprays were applied by the orchardists, all trees receiving the same 

 treatment after the dormant spray. While it is not desirable to make 

 definite recommendations or draw definite conclusions from the re- 

 sults of a single, season's observations, the results show a general ten- 

 dency which are interesting. Counts were made a month after the 

 treatment to determine the percent of Hve scale; three months after 

 the applications to determine the approximate infestation on the new 

 twigs, and in the fall to obtain the leaf infestation. The first count was 

 a careful examination of 250 scales to get the percent of scales alive. 

 The second count was an estimate of the infestation of the new twigs. 

 The third count was an actual count of the scales on 100 leaves collected 

 from different trees. Miscible oil, 1 to 15, and liquid-concentrate 

 lime-sulphur, 1 to 7>^, gave very good control. None of the dry lime- 

 sulphurs, soluble sulphurs, or barium tetrasulphide, gave results com- 

 parable with the liquid concentrate, when used at label strength. 

 Some gave fair results at (IM) label strength and most gave good re- 

 sults, equal to the liquid concentrate, when used at twice label strength. 

 It might be added that the dry lime-sulphurs did give appreciable con- 

 trols over the untreated. 



From these results we do not feel justified in recommending dry 

 lime-sulphur, but if the liquid or miscible oil are not available, dry 

 lime-sulphur should be used at 1>^ to 2 times label strength. 



The experiments are being continued, and in addition, tests are 

 being made to determine the value of fall versus spring applications, 

 and the relation of spraying to parasitism, etc. 



THE MAPLE CASE-BEARER PARACLEMENSIA 

 ACERIFOLIELLA FITCH. 



By Glenn W. Herrick 



Although the census of 1920 indicates that, on the whole, the volume 

 of the maple sugar industry of New York State has decreased during 

 the last twenty years yet the total value of the maple sugar and syrup 

 manufactured during 1919 was $3,399,434 a substantial increase 

 over any previous year of which data are available. There are prob- 

 ably several factors that have contributed to this decrease in volume 

 of the maple sugar industry one of which is undoubtedly the deteri- 

 oration of the trees through the inroads of disease and insect pests. 



