132 



Powdery mildew ( Spaerotliaera moro-uvae). On gooseberry. Ex- 

 tent of damage unkown. 



Powdery mildew ( Podospliaera oxyacanthae). On cherry. Ex- 

 tent of damage unknown. 



Leaf curl (Exoascus defarmaus). On peach. Usually quite 

 prevalent. 



Early blight (Altemaria solani). On iwtato. Usually prevalent, 

 doing considerable damage. 



Late blight (Phytophthora infestaus). On potato. Present to 

 some extent ; usually very destructive. 



Black-rot (Pseudomonas compestrio). On cabbage and closely re- 

 lated crops. 



VI. Fruit, Seed and Tuber diseases, affecting crop's economic value, di- 

 rectly — 



Apple rots, ripe or bitter (Glomerella rufomaculaus) ; Apple rots, 

 black (Sphaerapsis malorum). Usually common and causes 

 of considerable losses. 



Brown rot (Scleratinia fructigena). On peaches and plums 

 chiefly, often causing a loss of half the crops. 



Scab (Venturia inaequalis). On apple: very common and injurious. 

 (Yenturia pyrina). On pear; prevalent, but not especially 

 prevalent. (Cladosperium carphyllum). On peach; bad on 

 some varieties. 



Black rot (Gnignardia bidwelli). On grape. Widespread and 

 injurious. 



Fruit rot (cause uncertain). On tomato. Very injurious in some 

 localities. 



Flyspeck and sooty blotch (Leptothyrum and Phyllachara spp.). 

 On apple, often affecting a considerable per cent, of the crop. 



Smuts (Ustilago leae). On corn; widespread, sometimes causing 

 bad losses. (Ustilago avenae.) On oats; usually bad; losses 

 underestimated. (Ustilago tritici.) On wheat; so-called loose 

 smut; usually prevalent. (Tilletia foetaus.) On wheat; so- 

 called stinking smut ; usually prevalent. 



Wheat scab (Fusariura culmorum). On wheat; usually more or 

 less abundant ; sometimes .-iceountable for heavy losses. 



White mold of corn (Fusarium sp.). Very abundant in some locali- 

 ties during present and past seasons. 



