Indiana I'hnil ni.scdsc.s. iy<j 



/c? 



Fi.u-. -2. Api.lr s<-nb. 



the leaves and fniit of ("lieiiaii.uo. I'.eiioiia. \. W. (Jreenins. Jf)iiathaii. and 

 I'.eii Davis, wliile there was very little (Hi the Transparent and Ducliess. 

 i:arl.v infection of the fruit caused luucli cracking and uialforuiation which 

 was followed by secondary rots late in the season. 



Observations upon varietal susceptibility by Burkholder indicate that the 

 \arieties Moyer's Pride. Salome. Ben Davis. Winesap. Rome Beauty, Delici- 

 ous and Fameuse are very susceptible to scab, while resistance is shown 

 l'.\ the varieties Yellow Transparent. Early Harvest, Stark. Flore Belle, 

 r.eiltlower, Stayman Winesap. York Imperial. Black Twig and Grime.s 

 (Jolden. 



Black rot due to Physaloxpara ci/dmiiac occurred generally throughout 

 (he state on apple foliage. In one orchard in May the extreme prevalence 

 of the frog-eye leaf-spot on trees badly affected with blotch was of interest 

 Ix'cause the black rot fungus is very commonly present in the old blotch 

 cankers. In an orchard near Vincennes a local out-break of the frog-eye 

 leaf-spot was very evidently associated with a limb which probably had 

 l>een killed by fire-blight and was harboring the black rot fungus. On the 

 other hand this leaf-spot was also present on young, well cared- for trees, 

 .hnie 25 the leaf-spot was noted to be especially bad on the varieties Ben 

 ]>avis and Jonathan. The fruit rot of the blossom-end type as well as 

 the type following blotch, scab and worm injury was very common late 

 in the season. 



Fire blight due to Bacillus amylovorus was very common on apple trees 

 ni'ar blighted pear trees. Because of the prolonged growing season this year 

 the attacks of fire blight continued well into the summer. July 2 this dis- 

 ease was found rather prevalent on certain varieties in a large orchard 

 near Vincennes. An orchardist at Laurel found that thorough spraying for 

 aphis control was effective against blight and that iinproi>er spraying re- 

 sulted in an increased amoiuit of blight. 



Sooty blotch and fly speck ( I.cplothi/riion jxniii) were very common on 

 certain varieties. 



