PAPERS OX BIOLOGY AND AGRICULTURE 255 



Powdery mildew (Sphaerotheca mors-uvae (Schw.) 

 B. & C.) was collected near Eidgway in Gallatin county 

 July 15. 



Grape: Black rot (Guignardia bidwellii (Ell.) V. & 

 R.) appeared to be rather more severe than usual. An 

 estimated loss of 5 per cent of the crop was not so evi- 

 dent, although really larger in proportion, to the grape 

 grower on account of the unusually favorable weather 

 conditions and a consequent excellence and abundance of 

 crop. 



Downey mildew (Plasmopara viticola (B. & C.) B. & 

 deT.) was slightly less severe than usual and occurred 

 throughout the state. A loss of 1 per cent is estimated. 

 It was first reported June 9 near Lebanon in St. Clair 

 county. 



Powdery mildew (Uncinula necator (Schw.) Burr.) 

 was probably as abundant as usual. The earliest collec- 

 tion was from Alexander county, August 17. 



Strawberry: Leaf blight (Dendrophoma obscurans 

 (E. & E.) Anderson) was noted to be more abundant 

 than heretofore. 



Leaf spot (Mycosphaerella fragariae (Schw.) Lind.) 

 was very abundant and is estimated to have taken its 

 usual 10 per cent toll of the crop of the state. 



TRUCK AND GARDEN CROPS 



Asparagus: Rust (Puccinia asparagi DC.) was com- 

 mon throughout the state. The first collection was made 

 near Gefr in AVayne county, July 1. 



Anthracnose (Colletotrichum sp.) was collected Au- 

 gust 26, near Polo in Ogle county. It was collected later 

 in Champaign county. This is the first report of this 

 disease in Illinois. 



Bean: Anthracnose (Colletotrichum lindemuthianum 

 (S. & M.) B. & C.) was generally distributed, but less 

 severe than usual. The first collection was made in Jack- 

 son county, August 19. 



Bacterial blight (Pseudomonas phaseoli E. F. S.) was 

 of slight importance although of general occurrence. The 

 first collection was made June 22 in Jefferson county. 



