. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 112 DECIDUOUS FKUIT INSECTS AND INSECTICIDES. utility of the one-spray method under eastern conditions is greatly lessened on account of the necessity in most regions of giving orchards additional applications of fungicides for the prevention of such dis- eases as apple scab, bitter rot, apple blotch, sooty blotch, etc. In regions where bitter rot and apple blotch are not troublesome and in the case of varieties little susceptible to apple scab, the single appli- cation would be most likely to have value, and orc
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 112 DECIDUOUS FKUIT INSECTS AND INSECTICIDES. utility of the one-spray method under eastern conditions is greatly lessened on account of the necessity in most regions of giving orchards additional applications of fungicides for the prevention of such dis- eases as apple scab, bitter rot, apple blotch, sooty blotch, etc. In regions where bitter rot and apple blotch are not troublesome and in the case of varieties little susceptible to apple scab, the single appli- cation would be most likely to have value, and orchardists thus situ- ated should determine the applicability of the method under their respective conditions. Where additional sprayings are necessary for fungous diseases, an arsenical should be added, as the additional cost is slight. One very important fact has been developed as a result of these studies, namely, the importance of great thoroughness in spraying after the falling of the petals. While this has been insisted on by entomologists for many years, yet the great extent to which the cod- ling moth may be controlled by this one treatment has not been appre- ciated. The aim should be to poison the calyx cup of each and every apple on the tree, irrespective of whether subsequent treatments are to be given. Imperfect spraying at this time can not be remedied by any number of later applications. ADDITIONAL COPIES of this publication -ii- may be procured from the Superintend- ent of Documents, Government Printing Office, Washington, D. C., at 5 cents per copy. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
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