140 ILLINOIS STATE ACADEMY OF SCIENCE 



susceptible. This statement is based on the fact that 

 these varieties have been growing in close proximity 

 to the diseased varieties for several years and were re- 

 ceived from Kellogg 's Nnrsery along with the .diseased 

 varieties. 



Bederana is by far the most susceptible variety. Other 

 varieties showing the disease are Eresko, Sionilli, Kel- 

 loggs Prize, Kelloggs Big Late, Superb (everbearing), 

 Glen Mary, Lady Corneille and Gibson. 



Leaf scorch is common in Canada and has been re- 

 ported from a number of eastern states. It is also known 

 to occur in Louisiana, Indiana, and Michigan. 



Symptoms. The spots are usually much more numer- 

 ous than those of the common leaf spot, often giving a 

 blotched purple appearance to the entire leaf. The indi- 

 vidual spots are small, at first, (as compared with Myco- 

 sphaerella fragariae spots), usually two to five mm. in 

 diameter, somewhat irregular and deep purple on the up- 

 per surface of the leaf. The centers of the spots appear 

 slightly raised above the surface of the leaf and are black. 

 The coal black, slightly wrinkled fruit bodies of the fun- 

 gus may be seen with a hand lens. On the lower surface 

 of the leaf the spots are much lighter in color and much 

 less distinct. The spots are in evidence also on the 

 petioles of the leaves and on the fruit stalks. 



