190 Proceedings of Indiana Academy of Science. 



~i 



Rust (Gymnosporangium juniperi-nirf/inianae) was very severe on the 

 foliage of susceptible varieties. It was noted on Jonathan fruit and 

 foliage in Morgan County Juno 25. 



Powdery mildew {Podosplwcni Iciirotricha) was found on the Missouri 

 Pippin variety at Ladoga by Dr. P. J. Anderson. 



The collar rot of the Grimes variety which was recorded last year (as 

 root rot) as prevalent in southern Indiana causes the greatest fatality 

 when the trees are 20 to 25 years old according to Burkholder. He re- 

 ports one case of a 25-year-old orchard near Madison in which 25 per cent 

 of the trees are dead or dyiim. Simc the Grimes is otherwise a very desir- 

 able variety for southern Indiana it has been successfully top worked on 

 other stocks. 



In the case of all varieties planted on newly cleared land, Burkholder 

 reports that a certain percentage of root rot has occurred. 



Pig. ?,. Apple .Innathiiii siH.t. 



Jonathan spot (Fig. P> i was noted at Mooresville. Cullinan reports this 

 trouble as very prevalent this year and found it present on unpicked fruit 

 at Laurel-. Burkholder noted the same thing in Porter County and on 

 King and Black Twig apples still on the trees at Aurora. 



Bitter pit was rather common on Stark apples at Mooresville and is re- 

 ported by Cullinan as common on Stark, Grimes, and Baldwin apples. 

 Water core was found at Knightstown. 



Frost injmw occurred in many sections. At Mooresville blossom clusters 

 and whole spurs were killed outright and the set of fruit was severely cu<". 

 Some frost banding also occurri'd. The first leaves were stunted, dark 

 green and wrinkled and many turned yellow and dropped off. 



Severe hail injury occurred near Decker Jime 23 and the qualify of 

 the crop was greatly lowered. In one orchard the entire crop was rendered 

 unfit for market by the extreme malformation resulting from the hail 

 iiruises. 



According to Burkholder spray injury to leaves and fruit occurred at 



