J. Ralph Cooper

Date of this Version


Document Type



Cooper, J. Ralph (1917) Spraying Experiments in Nebraska (Research bulletin: Bulletin of the Agricultural Experiment Station of Nebraska No. 10)


ISSN 0097-1341


The more important questions which were considered during the three years covered by the present report were as follows: 1. How many summer sprays are required and when should they be applied? 2. What is the difference in efficiency between various brands of arsenate of lead? 3. What are the relative values of lime sulphur and Bordeaux as fungicides for spraying apples? 4. Is it possible to lessen or prevent Bordeaux injury and at the same time control fungous diseases? 5. Is it possible to interchange Bordeaux and lime sulphur in a spray schedule in such a manner as to secure better results than by using either fungicide for the complete schedule? 6. Is home boiled lime sulphur as efficient as the ordinary commercial brands of concentrated lime sulphur? 7. Of what value are certain new fungicides and insecticides as summer sprays for apples? 8. In what manner should the spray be applied,as a fine mist or as a coarse, driving spray? 9. Does it pay, commercially, to use both an insecticide and a fungicide at every application? 10. Are the effects of spraying noticeable for longer than one season, i. e., are they cumulative? 11. What effect does clean culture have on disease and insect control? 12. What capacity machine is most economical for the various sizes of orchards ranging from the small home orchard to the largest commercial orchards?