137 



made September ISth at Greenfield showed fruit infection ranginj; from 4~) 

 to 72%. at Kni;;lit.Nto\vn, 78 to S(!%, and at Mooresvilie. 77 to IK'.'/r. IVfiolc 

 infection ranycvl hetwet'n ~u and 74% at Mooresvilie. In tlic (Jrccnlicld 

 (irciiard hlotcli was found on two young (Jrimes trees that were overlniiiii 

 liy diseased (jlreeninf,'s, indicative of drip infection. (hmxI control of 

 blotch on the fruit was secured by the Hordeaux s])rays. but no success was 

 bad with the concentrated lime sulphur dormjint spray. 



Scab, caused by VcntHria iiidrtiinilis. is the iiiosi Iimim. riant apple dis- 

 ease in Indiana and seemed to be equally iiicvalenl tlirou,t,'iionl (be slate, 

 r.ecanse of the wet weather in .May. scab was particularly se\ere on the 

 foliage anil blossoms. It was not, however, as severe on the fruit as the 

 early infection led one to expect. However, it was generally prevalent on 

 fruit in tlie northern part of the state. H. H. Swaim reports difficulty in 

 finding scab-free fruit in a sprayed orchard near Soutli Bend. Cullinan 

 found in an experimental orchard at Peru, practically 1()()7c defoliation 

 and no fruit in unsprayed check plots as a result of scab. He further re- 

 ports that tlie Ben Davis variety suffered severely from this disease. Burk- 

 holder found scab worse this year in southern Indiana tlian he had i)re- 

 viously noted. Owing to the very eai'ly and vigorous start made by the 

 disease, spray control was less successful than usual. 



Taking the state as a whole, black rot caused by t'^ijhacropsis malorum 

 was by far the most prevalent disease. The frog-eye leaf-spot was particu- 

 larly ubicpiitous and destructive, and the blossom-end type of fruit rot was 

 rather common on certain varieties. The latter condition was noticed in 

 an orchard at Knightstown. June 17th.. and on Summer Ilambo in an or- 

 cliard near Bedford. July 15th. Cullinan found black rot very severe on 

 Ben Davis apples in an orchard at Bicknell in August in the shape of a 

 blossom-end rot associated with a heavy San Jose scale infestation of the 

 calyx ends which had caused cracking of the fruit. While this disease is 

 usually worse on old unpruned trees, it was found very severe in a large 

 orchard of young trees near Paoli. May 28th.. resulting in a noticeable yel- 

 lowing of the foliage. Considei'able defoliation was caused by this disease 

 and in cases carefully noted it was found that five or six lesions were suffi- 

 cient to cause tlie leaf to drop. 



Early in the season, fire Idight caused by Bdcilliix tnni/lovorus occasion- 

 ally was noted to be .severe in apple trees, particularly those near diseased 

 pear trees. A striking example of this was noted ne.ir Knightstown. June 

 17th.. where there was a r(»w of l)adly l)liglited pear trees along one side of 

 an orchard. The ajiiile trees along tliis side were b.tdly blighted, while 

 fartlier ovtu- there was not much blight to be found. In a doory.-ird in 

 Orleans, a case was ob.served where there was considerable blight on one 

 side of an apple tree, the side adjoining a blighted pear tree. In a small 

 orchard of young trees near Indianapolis, the extreme susceptibility of the 

 Winter Banana variety to fire blight was clearly indicated. 



Sooty blotch caused by Lcijlothifrium poini occurred rather connnonly 

 in the central and southern parts of the state. Considerable sooty blotch 

 was noted on the fruit from an orchard near Mooresvilie. 



