13 



The addition of calcium caseinate spreader to the liquid spray was followed by a 

 very slight decrease in the percentage of scabby fruit. 



The addition of calcium caseinate spreader to sulfur dust did not result in a 

 smaller percentage of scabby fruit than when sulfur dust was used alone. 



Since there was no injurj^ to the sprayed tree by lime-sulfur lead arsenate com- 

 bination spray, it could not be proved that the addition of lime to this spray de- 

 creased its toxicity to the sprayed tree. 



As good a control of apple scab was secured by the use of lime-sulfur throughout 

 the spraying season as by substituting Bordeaux mixture for lime-sulfur for the 

 applications before the flower buds opened. 



Atomic Sulphur controlled the disease as well as did lime-sulfur. Because of 

 the absence of burning it was impossible to determine how they compare in their 

 effect on the sprayed tree. 



Sulfur dust throughout the dusting season controlled apple scab as satisfactorily 

 as when copper dust was substituted for sulfur dust for the applications before the 

 flower buds opened. 



Literature Cited. 



(1) Krout, Webster S. Apple scab and its control. Mass. Agr. Col. Ext. Ser. 



Cir. 1921. 



(2) Krout, Webster S. Combating apple scab. Spraying and dusting experi- 



ments in 1922. Mass. Agr. Expt. Sta. Bui. 214. 1923. 



(3) Childs, Leroy. Spray gun versus rod and dust in apple orchard pest control. 



Oreg. Agr. Expt. Sta. Bui. 171. 1920. 



(4) Wallace, Errett. Scab disease of apples. N. Y. (Cornell) Agr. Expt. Sta. 



Bui. 335. 1913. 



(5) Childs, Leroy. New facts regarding the period of ascospore discharge of the 



apple scab fungus. Oreg. Agr. Expt. Sta. Bui. 143. 1917. 



(6) Gardner, V. R. (et al.). Horticultural investigations of the Missouri experi- 



ment station. In Mo. Agr. Expt. Sta. Bui. 197:72-75. 1922. 



(7) . Studies in apple scab control. In Wis. Agr. Expt. Sta. Bui. 352: 



5&-60. 1923. 



(8) Massey, L. M. and Fitch, H. W. Some results of dusting experiments for 



apple scab and peach leaf curl in 1921-22. Reprint from Ann. Rpt. N. Y. 

 State Hort. Soc. 1923. 



(9) Sears, F. C. Dry Ume-sulphur vs. Uquid lime-sulphur. In Bristol County 



Farmers' Bui. May, 1923. 



(10) Button, W. C. Dusting and spraying experiments of 1918 and 1919. Mich. 



Agr. Expt. Sta. Spec. Bui. 102. 1920. 



(11) Eustace, H. J. and Pettit, R. H. Spray and practice outline for fruit growers. 



Mich. Agr. Expt. Sta. Spec. Bui. 93. 1919. 



(12) Stearns, L. A. and Hough, W. S. Spreader tests on apples and peaches. In 



Jour. Econ. Ent. 16:198-201. 1923. 



(13) Parrott, P. J., Stewart, F. C. and Glasgow, Hugh. Spraying and dusting 



experiments with apples in 1922. N. Y. (State) Agr. Expt. Sta. Cir. 

 63. 1923. 



(14) Butler, 0. and Smith, T. 0. Relative adhesiveness of the copper fungicides. 



/nPytopath. 9:431-444. 1919. 



(15) Butler, O. Notes on the preparation of Bordeaux mixture. N. H. Agr. Expt. 



Sta. Cir. 15. 1914. 



(16) Mason, A. F, Controlling codling moth with thorough and frequent sprays. 



In N. J. Agriculture 3 :1 :8. 1921. 



(17) Ruth, W. E. Chemical studies of the lime-sulfur-lead arsenate spray mixture. 



Iowa Agr. Expt. Sta. Res. Bui. 12. 1913. 



(18) Robinson, R. H. The beneficial action of Ume in lime-sulfur and lead arsenate 



combination spray. In Jour. Econ. Ent. 12:429-433. 1919. 



(19) Bourn^, A. L Improved lime-sulphur, lead arsenate, milk of Ume spray. 



In American Fruit Grower, Mar. 1922, p. 5. 



(20) Regan, W. S. The fruit-tree leaf-roller in the Bitter Root Valley. Mont. 



Agr. Expt. Sta. Bui. 154. 1923. 



(21) Lovett, A. L. Spreaders. In Crop Protection Inst. Cir., June 1, 1922. 



