AGRICULTURAL EXPERIMENT STATION. 179 



REMEDIES. 



The methods of treatment are direct and preventive. From 

 the fact that the parasite is internal and only appears at the sur- 

 face while producing summer spores, the methods must be largely 

 preventive. 



Direct Methods. 



Any means by which the growth of the summer sjwres can be 

 checked, would prevent the spread of the disease from plant to 

 plant during the summer season, and prove beneficial. 



The application of copper compounds to destroy the summer 

 spores, has been quite extensively tried the past season at several 

 of the Experiment Stations and elsewhere, with satisfactory 

 results. We would recommend them for careful trial in Maine. 



80LUTIOXS. 



No. 1. — Mix 1 qt. of 22° ammonia water (hartshorn) with 

 3 028. of carbonate of copper. Stir rapidly until a clear liquid is 

 produced. When ready to use it, dilute to 22 galons with water. 

 Apply with a spraying apparatus or force pump. 



No. 2. — Dissolve 2 lbs. sulphate of copper (blue stone; in hot 

 water, dissolve and add 2 1-2 lbs. bicarbonate of soda. When 

 cool, add 11-2 pints of commercial ammonia water. Dilute to 

 22 gallons with water. Apply as stated above. 



No. 3. — Dissolve 6 lbs. copper sulphate in 16 gallons water. 

 Shake 4 lbs. of fresh lime into 6 gallons of water. When cool 

 mix the above solutions slowly and thoroughly and apply as stated 

 above. 



Any one of the copper compounds prepared as stated above 

 will do, though the first two are easier prepared and applied. 

 If 26° ammonia is used add one-third more water. Paris Green 

 in water (1 lb. to 80 gallons) could be added and applied at the 

 same time for the potato beetle. London purple is regarded by 

 some as preferable to Paris Green and if used should be added 

 1 lb. to 100 gallons. 



Remarks. 

 Use a force pump Mith brass fittiags to apply these mixtures as 

 copper compounds corrode iron. The nozzle should have a fine 

 spray that will cover the foliage well and not drench it. The 



