J. V. Etrk and E. S. Salmon 491 



checked recovered, produced fresh conidiophores by the 5tli to 8th day 

 and were ahiiost or qidte powdery by the 12th day. 



When the concentration of "hver-of-sulphur" is increased to 0-8 % 

 (0-34 % sulphide-sulphur) the solution proved either completely or 

 almost completely fungicidal. 



It must be observed, however, when considering the fungicidal 

 action of the solutions referred to above that with Gooseberries serious 

 scorching occurs^ at concentrations greater than 0-3 %, at which 

 concentration it is found that the fungicidal value of this substance 

 is nil. 



V. Ammonium Sulphide (Yellow). 

 Hops. 191-1. 



Exper. 1. Solution containing 0-04 % sulphide-sidphnr (S.S.) and 

 1 % soft soap. 



1st day. Mildew much clieckcd. 



3rd day. All the patches still ilormant and sterile. 



5th day. As above. 



1th day. All the patches quite sterile and many of them dying. 



12th day. All the patches dying or dead. 



Exper. 2. Solution containing 0-04 % S.S. and 0-5 % soft soap. 



1st day. Mildew checked; short conidiophores visible on most patches. 

 2rd day. As above. 



5th day. All the patches still dormant. 



8th day. All the patches completely sterile and many dying or dead. 

 12th day. Mildew just aUve at two or three patches only (out of 20 patches), 

 and producing there a very few conidiophores ; the remaining patches dead. 



Exper. 3. Solution containing 0-06 % S.S. and 1 % soft soap. 



1st day. Mildew checked. 



Srd day. Patches either sterile or with very short conidiophores. 



5th day. AU the patches quite sterile, dormant or dying. 



8th day. As above. 



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



1st day. AU the patches checked and dormant. 



3rd day. All the patches still quite dormant. 



5th day. AU the patches dormant and sterile, 



1th day. All the patches sterile, some dying. 



9</t day. As above. 



' Salmon, E. S., "Report on Economic Mycology" (Journ. S.-E. Agric. Cotl. xxn. 

 p. 410 (1913) [1914]!. 



