104 SEVENTEENTH REPORT. 



BORDEAUX MIXTURE, 

 2-2-50. 



Stock solution of Ca(OH) 20 cc. & 20 cc. water 



Stock solution of CuSO'^ 20 cc. & 20 cc. water 



This gives a mixture equivalent to one having 2 lbs. copper sul- 

 phate, 2 lbs. lime and 50 gallons of water. 



TABLE IX.— FUNGICIDAL VALUE OF 2-2-50 BORDEAUX MIXTURE. 



The results given in the above tables show that Bordeaux mix- 

 ture has a very positive fungicidal action when tested under con- 

 ditions similar to those found in the field. Even the weakest mix- 

 tures seem as effective as the more concentrated, gennination being 

 effectively prevented in ever\- case. 



BARIUM POLYSULFIDE SOLUTION." 



This is a proprietary compound, recently patented and not yet 

 put on the market. Some was sent for experimental juirposes and 

 was tested on the fungus although it was unknown whether it 

 would be possible to use it on the plant without injury. 



The mixture Avas made up in three strengths as shown l)elow. 

 The solution was made readily by simply allowing the required 

 quantity to dissolve in cold water. 



Tests with 1-50 solution : 



9. Thomsen Chemical Co. 



