216 Report of the Botanist of the 



It seems probable that the disease of red raspberries is the same 

 of that of the black varieties. It may, perhaps, be aggravated 

 by drought, but the evidence in hand is opposed to the theory that 

 drought is the sole, or even the principal, cause. In the first 

 place the symptoms are not those of drought. On raspberry canes 

 suffering from drought the foliage becomes yellowish, the berries 

 are abnormally small and the whole plant gradually dries up. All 

 of the fruiting canes in a hill are about equally affected; in fact 

 the whole plantation, if on fairly uniform soil, will be uniformly 

 affected. Whereas, in the disease under discussion, canes die 

 here and there with diseased canes and healthy canes occurring 

 even in the small hill. 



We are not prepared to say positively that the Phoma found on 

 the affected canes is the cause of the disease because no inocula- 

 tions with it have been made; but it is certainly to be regarded 

 with suspicion. This disease is a worthy subject of investiga- 

 tion.^^ 



LEAF spot. 



(Septoria rubi Westd.) 



Rare. Observed only at Poughkeepsie. 



STRAWBERRY DISEASES. 



drought. 



Straw^berries were damaged more by drought than by all di- 

 seases combined. The few persons so situated that they could 

 irrigate their strawberries reaped a harvest of profit. 



LEAF BLIGHT OR LEAF SPOT. 



(Sphaerella fragariae (Tul.) Sacc.) 



The situation with regard to this disease may be summed up in a 

 phrase used by several of our correspondents ; namely : " Severe 

 on some varieties." It has not been nearly so virulent as in 



33 The supposedly bacterial disease of Turner and Marlboro rasperries de- 

 scribed by Freda Detmers, in Ohio Agr. Exp. Sta. Bui. 6, p. 128, seems to be 

 different. 



