381 



LIST OF D1SKASKS. 



Alfalfa (Medicago sativa L.) 



Downey Mildew, Peronospora Trifoliorum DeB. Tippecanoe, 1915. 



Leaf Spot, Pseudopeziza Medicaginis (Lib.) Saee. Common. 78. 



Rust, Uromyces Medicaginis Pass. Putnam, 1907. 



Violet Root Rot, Rhizoctonia Crocorum (Pers.) DC. Referred to 

 formerly as R. Medicaginis D.C. St. Joseph, 1915. County agent, J. 

 S. Bordner, reported a number of affected spots in one field, each 

 spot being as much as 10 feet across and enlarging at the rate of 1 

 foot every 30 days during the growing season. So far as known to 

 the writer this disease has been reported on alfalfa only from 

 Nebraska, Kansas and Virginia. 



Wilt, Sclerotinia Trifoliorum Eriks. Clark, Fulton and Henry, 1914. 

 Especially prevalent in Clark county. 



Apple (Pyrus Malus L.) 



Bitter Pit (cause physiological). Common on Baldwin variety. Bald- 

 win Fruit Spot, caused by Cylindrosporium Pomi, has been reported 

 but no definite determination of it has yet been made. References 

 to Baldwin Fruit Spot: 58, 59, 84, 36. 



Bitter Rot, Glomerella rufomaculans (Berk.) Spaul. and von Schr. Preva- 

 lent in the southern half of the State. 46, 76, 78, 57, 58, 84, 100, 36, 

 40. 



Black Rot, Sphaeropsis Malorum Peck. Shear's studies indicate genetic 

 connection with Melanops. Prevalent in the southern half of the 

 State. 78, 58, 59, 84, 100, 67, 36, 40, 117. 



Blister Canker, Nummularia discreta (Schw.) Tul. Becoming serious in 

 the southern part of the State. 36, 40, 39, 117, 86. 



Blotch, Phyllosticta solitaria E. & E. Common. 78, 58, 59, 84, 37, 40. 



Brown Rot, Sclerotinia cinerea (Bon.) Wor. Common. 58, 59, 84. 



Crown Gall, Pseudomonas tumefaciens E. F. Smith & Towns. Reported 

 serious occasionally on nursery stock. 57, 59, 84, 36. 



European Canker, Nectria ditissima Tul. Found injurious to nursery 

 stock. 57, 58, 59. 



Fire Blight, Bacillus amylovorus (Burr.) DeToni. Common. 76, 78. 

 57, 58, 59, 34, 36, 38, 117, 62. See also under Pear. 



