FIFTEENTH ANNUAL YEAR BOOK— PART XI 821 



A few reported cases of Bean anthracnose and beet spot (Cercospora 

 beticola). Melon wilt reported from Muscatine county. Cabbage yellows 

 iFusarium) serious near Muscatine. 



DISEASES OF FORAGE CROPS. 



Alfalfa mildew (Peronospora Trifoliorum) reported for the first time 

 from Allamakee county by Mr. O. Schultz and the alfalfa root rot 

 (Rhizoctonia violacea) from Scott county by Prof. G. R. Bliss and Mr. 

 Lau, also for the first time. Clover rust was abundant during Sep- 

 tember, also the alfalfa rust. There was much silver top in Eastern 

 Iowa, in some cases 50 per cent of the blue grass heads were killed. 



FOREST TREE DISEASES. 



Buckeye was seriously attacked by a spot disease (Phyllosticta aescuU). 

 So severe was it in Boone county that many trees were defoliated in 

 May. There was less of the Black spot of the Maple {Rhytisma acerinum) 

 than usual. There was as usual some of the Sycamore blight (Gloeo- 

 sporium nervisequum) but less than in 1913. Many shade trees suffered 

 because of the dry weather; this was particularly true of the American 

 or white elm. 



