J. V. Eyre and E. S. Salmon 495 



Exper. 2. {Yellow Rmicjli.) Solnlion. containing 0-08% S.S. (uul 

 1 % soft soaj). 



9th day. A large mimbei- of the leaves turned y^'Ho'*^'. resulting in a severe 

 leaf-fall. 



11th day. A large nuiuber of the leaves, and also of the berries, had fallen otf. 

 The injury caused was so severe as to preclude the possibihty of the use of the spray 

 on this variety'. 



Exper. 3. (Luncashire Lad.) Solution containing 0-16 % S.S. and 

 1 % soft soap. 



Sth day. Decided scorching effect on the older leaves, accompanied by a slight 

 leaf-fall. Two berries fell off. 



11th day. No further injury caused. 



In the following experiments Gooseberry bushes, growing in the 

 open, affected with American Gooseberry-mildew [Sphaerotheca iiiors- 

 uvae) in the "powdery" conidial stage, were sprayed. 



Exper. 4. Solution containing 0-08 % S.S. and 1 % soft soap. 



Six shoots, densely smothered with the mildew, were sprayed. 



12//) day. Four out of the six shoots bore only sterile mycehum ; one shoot 

 showed a few scattered conidiophores on the patches on two leaves; the remaining 

 shoot had several minute, almost "powdery" patches on two leaves. It was clear 

 that the solution had exerted a powerfiU fungicidal action. 



Exper. 5. Solution containing 0-13 % S.S. and 1 % soft soap. 

 One shoot, densely smothered with the mildew in a "powdery" 

 condition, was sprayed. 



&th day. The mycehum everywhere dried up and completely barren. No injury 

 caused to the leaves or tip of shoot. (Note. A similarly-aft'ected shoot on the same 

 bush was sprayed at the same time with a solution of "hver-of-sulphur" containing 

 the same percentage (0-13 °o) of sulphide-sulphur and 1% soft soap. This had 

 no fungicidal effect (see above, p. 490).) 



Exper. 6. Solution containing 0-16 % S.S. and 1 % soft soap. 



Six shoots, densely smothered with the mildew in a "powdery" 

 condition, were sprayed. 



12//) day. The mildew on all six shoots was cither dead, with the mycehum 

 becoming disintegrated, or quite sterile and dying. No injury was caused to the 

 leaves, berries or growing tips of the shoots, while the fungicidal action of the solution 

 appeared to be complete. 



1 This variety has proved to be extremely susceptible to injury from the effects of 

 sulphur (see Salmon, "Report on Economic Mycology" {.Jonrn. S.-E. Agric. College, 

 XXII. p 40.5 (1913) [1014]). . 



