Proceedings of Seventeenth Xormal Institute 259 



DUSTING METHODS IN ORCHARDS 

 Professor C. K. Crosby 



The experiments in dusting apple orchards the past season have 

 confirmed the results of previous years that arsenate of lead ap- 

 plied in the form of dust in combination with finely ground sul- 

 phur, gives as good or better results in the control of codling moth 

 than does the usual liquid applications. The detailed results of 

 these experiments will soon be published in a bulletin of the 

 Cornell Experiment Station. The dusting method of treating 

 apple trees is more rapid and convenient, and is of especial value 

 to gi-owers, who, because of large acreage, are unable to cover their 

 orchards at the proper time. Growers are not advised to discard 

 their spraying machines, but under certain circumstances will 

 find the dusting method of distinct advantage. As yet no method 

 has been devised of using dust for the control of scale, plant-lice 

 or red bug. 



