NOTES ON RECENT RESEARCH. 



247 



Copper Sulphate Solution. 



(Strong Solution.) 



1 lb. copper sulphate. 

 25 gallons water. 

 Applied only on trees without foliage. 



Copper Sulphate Solution. 



(Weak Solution.) 



2-4 oz. copper sulphate. 

 50 gallons water. 

 For trees in foliage. 



Potassium Sulphide. 



3 oz. potassium sulphide. 

 10 gallons water. 

 Valuable for Goosebery mildews Sec. 



Potassium Permanganate. 



1 part potassium permanganate. 



2 parts soap. 

 100 parts water. 



Eecommended in France for black rot and mildew of the Grape &c. 



Iron Sulphate and Sulphuric Acid. 



Water (hot), 100 parts. 



Iron sulphate, as much as will dissolve. 



Sulphuric acid, 1 part. 

 Prepare solution before using. Add the acid to the crystals and then 

 pour on the water. Valuable for treatment of dormant Grape vines 

 affected with anthracnose, application being made with sponge or brush. 



Corrosive Sublimate. 



(For Potato Scab.) 



2 oz. corrosive sublimate. 

 15 gallons water. 



Dissolve the corrosive sublimate in two gallons of hot water, then 

 dilute the 15 gallons, allowing the same to stand five or six hours, during 

 which time thoroughly agitate the solution several times. Place the 

 seed Potatos in a sack and immerse in the solution 1^ hour. Corrosive 

 sublimate is very poisonous ; consequently care should be taken in handling- 

 it ; nor should the treated Potatos be eaten by stock. The solution 

 should not be made in metallic vessels. 



Formalin. 



(For Potato Scab.) 



3 oz. formalin (40 per cent, solution). 

 15 gallons water. 



Used for the same purpose as corrosive sublimate, but not poisonous. 

 Immerse the seed Potatos for two hours. 



