464 



THE CANADIAN HORTICULTURIST. 



heap, inserting a wisp of straw into 

 the centre of each heap and letting- it 

 stick out of the top. This latter is 

 for ventilation. Gases and heat must have a 

 chance to escape. Next put on a generous 

 covering of straw or marsh-hay. If it is a 



foot or more in thickness it will do no harm. 

 In place of a wisp of straw an upright box, 

 say six inches square and long enough to 

 reach from the ground to a few inches above 

 the top of the heap when done, as shown, 

 will supply the needed ventilation. The 

 earth covering which comes over the 

 straw all around need not be more than a 

 few inches thick. The pit is thus to be left 

 until freezing weather, when a further cov- 

 ering of straw and earth, or a very heavy 

 covering of coarse manure, is to be placed 

 upon the frozen earth of the first covering. 

 Roots are pitted in the same manner. — Farm 

 mid Fireside. 



Fig. 1945. 



Fumigation for Scale. — Prof. Lochhead, 

 of the O. A. C, Guelph, gives the following 

 memo, for the guidance of nurserymen in 

 the fumigation of nursery stock : 



1. Formula for apple, pear, plum, cherry, 

 quince, shrubs and vines : Cyanide, 25/28 

 of an ounce ; sulphuric acid, i}^ fluid 

 ounces ; water, i'/^ fluid ounces for every 

 100 cubic feet in house or box. 



2. Formula for peach, raspberry, goose- 

 berry and currant : . Cyanide, ^3 ounce, 

 sulphuric acid, i fluid ounce ; water, i ^ 

 fluid ounces for every 100 cubic feet in 

 house or box. 



3. The following plants do not require 

 fumigation : Evergreens, strawberry plants, 

 bulbs and tubers, herbaceous perennials and 

 bedding plants. 



4. Damage may be done to stock {a) if 

 fumigation takes place too early in the fall. 



before the buds are set and the wood suffi- 

 ciently dormant, and [b) if fumigation takes 

 place late in spring after the buds have 

 begun to swell. 



5. The roots of stock should be exposed 

 for as short a time as possible, both before 

 and after fumigation. Experience shows 

 that much injury has resulted from such 

 exposures. 



6. No nurseryman shall use chemicals 

 other than those sent from the Agricultural 

 College, Guelph, except by special permis- 

 sion of the Inspector. 



7. Nurserymen should bear in mind that 

 a certificate of fumigation must be attached 

 to every package of nursery stock sent from 

 the nursery. 



8. No fumigation house is to be used for 

 fumigation purposes until sanction has been 

 obtained from the Inspector. 



