been peniiitted to o^row up in shrubs, weeds, and briers. The eftect ot 

 this neglect was D;enerally apparent during 1906, the crops in neglected 

 orchards being very light or there being no crop, whereas in well- 

 cared-for orchards the yield has invariably been good. 



As a rule, sufficient attention has not been given to the control of 

 diseases and insects, and under such conditions these have become 

 quite abundant and destructive. While numerous orchardists have 

 supplied themselves with spraying outfits and have sprayed their 

 trees, many very soon abandoned the practice, not having secured 

 satisfactory results. The principal difficulty appears to have been 

 lack of information concerning the troubles to be controlled and failure 

 to comprehend what constitutes thorough spraying. 



PLAN OF WORK. 



A plan of treatment was adopted which called for sprayings with 

 Bordeaux mixture having an arsenical added, except in the first 

 treatment, as follows: 



First application, when cluster buds opened, but prior to blooming. 



Second application, as petals fell. 



Third application, seven days later. 



Fourth application, thirty days after petals fell. 



Fifth application, June 25. 



Sixth application, July 17. 



Seventh application, August 11. 



Specificall}^ these treatments were designed to control the apple scab, 

 codling moth, leaf-spot, apple blotch, and bitter-rot, all of which 

 affections are c{uite destructive in Ozark orchards. 



The early treatments were for the apple scab and the first genera- 

 tion of the codling moth. The later treatments, beginning with 

 June 25, were for bitter-rot, apple blotch, leaf-spot, and the second 

 brood of codling moth. 



In practice it was not found possible to make the applications 

 entirely as planned, but the scheme was approximately carried out, 

 as will be detailed in the consideration of the respective affections. 



BITTER-ROT." 



INJURY. 



Bitter-rot is a fimgous disease of the apple, which causes decay of 

 both green and ripe fruit, rendering it unfit for market. It was 

 reported as seriously destructive in Illinois as early as 1869, and with 

 the increased development of the apple industry since that date it 



"For a more extended account of this disease and successful experiments in its con- 

 trol, see Bui. 93 of the Bureau of Plant Industry, U. S. Dept. of Agriculture, by W. M. 

 Scott. 

 283 



