U. S. p. A., n. K. Bui. (is, l';i,rt VII. ]). F. I. L, .\pril 29, 1! 



PAPERS ON DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



DEMONSTRATION SPRAYING FOR THE CODLING MOTH. 



INTRODUCTION. 



By A. L. QUAINTANCE, 



In Charge of Deciduous Fruit Insect Investigations. 



Although the codUng moth {Carpocaysa pomonella L.) has received 

 a hirge amount of attention from entomologists, horticulturists, and 

 others during the past fifteen or twenty years, and methods for its 

 satisfactory control have long been known and })racticed by orchard- 

 ists, it is nevertheless true that a large number of apple growers either 

 do not spray for this insect or, from lack of thorough and timely 

 aj)plications, do not secure satisfactory results. In connection with 

 other work at some of the field stations in the deciduous fruit insect 

 investigations of the Bureau of Entomology, it has been possible to 

 make demonstration si)rayings in the control of the codling moth to 

 serve as object lessons for the orchardists of the neighborhood. The 

 usefulness of the work is shown l)y its poi)ularity among fruit growers, 

 antl indicates that, in general, work of this cluiracter is perhaps as 

 nmch needed as work along purely investigative lines. 



DEMONSTRATION SPRAYING IN VIRGINIA IN 1907. 



]?y S. ^\'. FoKTEK. 



The orchard of Mr. J. J. McHenry, where this demonstration was 

 made, is located near the foot of the Blue Ridge Mountains near 

 Afton, in Nelson County. This orchard site is very favorable, hav- 

 ing a northern exposure with an elevation of about 1,000 feet, and 

 being partly protected on the western side by a mixed forest. 



Mr. McITenry's orchard consists of about 400 Yellow Newtown 

 Pippin trees and 220 trees of the Winesap, Limbertwig, and Shock- 

 ley varieties, all of which were reported to be 28 years of age. Some 

 years ago this orchard was very profitable, but the prevalence of the 

 codling moth, together with some of the more important fungous 

 diseases, as bitter rot and apple scab, soon reduced and practically 

 cut off all profits. Along with this the orchard for some time re- 

 ceived little or no attention, and only witliin the last two or three 

 years had there been any attempt toward spraying and the giving 



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