14 



(22) Anderson, 0. G. and Roth, F. C. Insecticides and fungicides. Spraying 



and dusting equipment. N. Y. 1923. 



(23) Britton, W. E. Recent developments in the use of insecticides. In Conn. 



(State) Agr. Expt. Sta. Bui. 242. 1922. 



(24) Safro, V. I. An investigation of lime-suKur injury, its causes and prevention. 



Oreg. Agr. Expt. Sta. Res. Bui. 2. 1913. 



(25) Doran, William L. Laboratory studies of the toxicity of some sulphur fungi- 



cides. N. H. Agr. Expt. Sta. Tech. Bui. 19. 1922. 



APPENDIX. 

 Table I. — Shoiving Treatment of Dusted Plots with Dates of Applications, Ma- 

 terials used arid Percentage of Scabby Fruit. 



I 



Frost 



Check 

 (no 

 treat- 

 ment) 



Sulfur 

 dust 



Sulfur 

 dust 

 plus 

 calcium 

 caseinate 



Copper- 

 lime- 

 arsenic 

 dust 



84.5 



16.9 



30.7 



17.6 



Sabine 



48.0 



4.8 



0.5 



0.7 



