GENERAT. INFORMATION 



25 



1. Bordeaux mixture. 



2. Soda- Bordeaux. 



3. Soda-lime Bordeaux. 



4. Copper sulphate solution. 



5. Hot water. 



6. Potassium sulphide. 



7. Formaldehyde. 



8. Corrosive sublimate. 



9. Lime-sulphur. 



10. Flowers of sulphur. 



I. Bordeaux Mixture. — This mixture was first 

 prepared by Millardet in 1885, and has since been 

 subjected to numerous modifications. Even at the 

 , present day different strengths are recommended 

 by various authorities. It is, and is likely to re- 

 main, the most important fungicide, being popular 

 on account of : — 



1. Its effectiveness as a fungicide. 



2. Its cheapness. 



3. Its safety from a hygienic standpoint. 



4. Its safety to the plant. ^ 



5. Its beneficial effects other than checking 



disease.^ 

 The active principle in the mixture is the copper, 

 which in very dilute solutions is poisonous to fungi 

 — some succumb to solutions containing one part of 



^ Recent results obtained in Lancashire (L.C.C. Farmers' Bulletin, 

 No. 27) and elsewhere tend to modify our ideas regardinj^ these 

 points ; however, further research is necessary. 



