70 EXPERIMENT STATION. [Jan. 



The past season lias been a favoral)le one for rnsts in gen- 

 eral. Apple rust (Pucrinia), wliieh is seldom present, was 

 more or less abnndant, as in the season of 1908, and affected 

 both foliage and fruit. Certain varieties seemed to be 

 more susceptible than others. Some bad cases of l)ean rust 

 (Uromyces) were noted here and there. This rust, like the 

 one on the apple, is seldom troublesome with us. Hawthorns 

 were affected more severely than usual with rust, resulting in 

 some damage to nursery stock. The wild species of hawthorn 

 is seldom immune to rust, but there is usually no comjilaint of 

 nursery stock rusting. Quince rust {Gymnosporangiiiin ), which 

 is alwavs to be found, was more abundant than usual. Some 

 severe cases of rust (Phragmidiuni ) were also noted on the rose, 

 and powdery mildew (SphcerotJicra) was (juite prevalent. 



Peach leaf curl (E.roascus) was occasionally observed, but 

 was not troublesome. 



A bacterial wilt of the egg])laut, whi(di is more common in 

 the south, was reported once or twice. 



One severe case of beet scab (Oo>;porn) was also observed. 

 In this particular case the soil had been limed, which sul)- 

 stantiates the fact that liming the S(til increases scab materiallv. 

 While witli us the beet is not so susceptible to scab as the ])otato, 

 care should be taken not to plant beets where scab is abund- 

 ant, and special precautions should be taken in applying lime 

 to the soil. 



Potatoes were generally free from troubles, but some cases 

 of Rhizocfoiiia were observed ; also a bacterial rot of the tuber. 



Dropsical swelling of pear twigs, a more or less uuusmd 

 trouble, was reported at different times, and the Baldwin iViiit 

 spot, which appears to be more cominim in dry than Avct sea- 

 sons, has been quite prevalent. 



The leaf spot of ap})le (PhyUosticta) was very abundant 

 early in the season and caused considerable defoliation. 



More or less sevei'c injury has resulted to peacdi and ])hini 

 trees the last year or two fi-om what is known as " gum- 

 mosis." This disease is ap]')arenlly cansed, at h^ast in nniny 

 cases, hy leax'ing the old '' niuniniicd '' frnit affected witli 

 l\Tonilia on the ti'ees over winter. These "mummied " ])]unis, 

 contaniinatcd with funa-i, come in contact with the branches and 



