J. V. Eyre and E. S. Salmon 483 



Ml day. All the patches dead or dying. 



Gth day. A few patches showing a few scattered couidiophores at the centre. 

 lOlh day. The mildew now practically everjTvhere dead; no further injury 

 to the leaves. 



Exper. 7. Solution containing 1 % caustic soda and 1 % soft soap. 



1st day. All the patches of mildew killed, accompanied by the death of the 

 underlying leaf-cells. The tip of each leaf blackened and shrivelled. 



ith day. Distinct injury apparent to the tip of each leaf and the margins near 

 the tip. 



Exper. 8. Solution containing 1-5 % caustic soda and 1 % soft soap. 



\st day. All the patches of mildew greatly checked or killed; accompanied 

 by a blackish-brown discoloration of the underlying leaf-cells, the injury extending 

 to the lower surface. 



Uh day. On the upper leaves all the patches dead ; on the lower leaves most of 

 the patches dead, but some bearing a very few scattered couidiophores at the centre. 

 No further injury to the leaves. 



6//i day. Only one patch on a lower leaf alive and showmg a very few scattered 

 conidiophores. 



10^/( day. The one patch of mildew nearly dead. 



Exper. 9. Solution containing 1-5 % caustic soda and 1 % soft soap. 



1st day. The mildew greatly checked, or killed ; slight injury to the tip and edge 

 of each leaf. 



2nd day. All the patches apparently killed; decided injury to the oldest leaves 

 in the form of pale "burnt" areas and curling of margins; to the next oldest leaves 

 in the form of curling of the tip and margins ; to the youngest leaves in shght injury 

 to the tip. 



6th day. The mildew entirely kiUed: no further injury to the leaves (this was, 

 however, serious). 



Exper. 10. Solution containing l-S % caustic soda and 1 % soft soap. 



3rd day. The mildew greatly checked. All the leaves badly "scorched," — the 

 two oldest leaves severely "scorched" at their inargins; the two intermediate 

 leaves less badly "scorched"; the youngest leaves so badly "scorched" at their 

 margins that they never developed normally. 



9tJi day. All the patches of mildew dead. 



Exper. 11. Solution containing 2 % caustic soda and 1 % soft soap. 



1st day. The mildew very greatly checked. AU the leaves severely "scorched," 

 the tips and margins curled. 



2nd day. All the patches of mildew killed, accompanied by the death of the 

 underlying leaf-celLs. All the leaves seriously uijured, curled and shrunken at the 

 margins and showing pale "l,)urnt" areas over their surface, 



32—2 



