47 



to two weeks later. The interval between the sprays will naturally vary 

 according to the severity of attack. The solution we use and recommend 

 is made up as follows: , 



Eight to ten ounces of Paris Green, one and a half to two lbs. arsenate 

 of lead to forty Imperial gallons of water. (See Note 3 and 4.) 



This solution adheres satisfactorily to the foliage and controls the 

 ravages of the beetle. Spraying will generally commence towards the 

 1st of July. 



5. After the first two applications have been made, we continue spray^- 

 ing regularly once every two weeks right up to harvest time, using "poi- 

 soned" Bordeaux mixture of the following composition: 



Four pounds of lime, or more if necessary (See Note 5) ; six pounds 

 sulphate of copper, twelve ounces Paris Green, forty Imperial gallons of 

 water. 



6. Do hot spray on very windy days. Spray early in the morning, 

 or commence two hours before sunset. Postpone spraying in unsettled 

 weather, but spray thoroughly, particularly after a period of rain. 



E. Storing Seed Potatoes. 



1. Avoid all injury through careless digging. 



2. Remove all bruised, damaged or frost-touched tubers before placing 

 potatoes in storage, else decay is likely to follow. 



3. Storage places should be dry, well ventilated and cool. The tem- 

 perature should be uniform and not below 33 F. and not above 3S F. 

 Store potatoes in bulk, not in barrels or bags. Providing the tubers were 

 matured when harvested, the loss in storage, amounting sometimes to 

 more than one-third of the crop, will be greatly, if not entirely, reduced, 

 if the above conrlitions are fulfilled. 



NOTES. 

 1. Using Bichloride of Mercury. 



Bichloride of Mercury is a deadly poison. While treating or drying 

 treated potatoes and when disposing of used solution, keep all farm animals 

 away. 



One pound of bichloride will make 200 Imperial gallons of solution. 

 The crude bichloride of mercury dissolves very slowly. Prepared bichloride. 



