THE CANADIAN HORTICULTUEIST. 



89 



If the bones can be readily ground, 

 yon have an excellent fertiliser without 

 further trouble. 



26. Paris Green. Will the sprinkling of 

 the trees with Paris Green make the 

 grass under the trees useless ? 



[J. DiBB, Clarksburg.] 



It is unsafe to use the gi-ass for pas- 

 ture for two or three weeks after the 

 spraying, but a good heavy rain will 

 wash off the poison from both trees and 

 grass. Has any reader any caution to 

 give us under this head ? 



27. Aphides. — -Innumerable quantities 

 destroy leaves and fruit of my white 

 Ox-heart Cherries. Can you suggest a 

 remedy ? [W. F. Burtox, Hamilton.] 



These black plant-lice are not easily 

 destroyed. The lady birds and the 

 ichneumon flies destroy them whole- 

 sale ; but, when these fail, try a strong 

 solution of pyrethruvi powder, say two 

 ounces to a gallon of water, and spray 

 the trees well with it. This substance 

 owes its effectiveness* to its volatile 

 properties, and thei'eby effects the de- 

 struction of the aphides where ordinary 

 poisons would fail. 



Spraying with a kerosene emulsion is 

 also recommended. This is made by 

 boiling half a pound of strong soap in 

 a gallon of water, and then adding two 

 gallons of kerosene. Churn this to a 

 cream, and then add nine times the 

 quantity of water. 



28. Plum for the North. — Is there any 

 plum better tliau the common red (blue ?) 

 plum that will succeed in the Ottaioa 

 valley ? 



[R. Williams, Hintonburg, Carlton Co.] 



Mr. A. A. Wright, Renfrew, replies : 

 — "I know of none as yet that 1 can 

 recommend as very ' sure to grow.' I 

 have several that promise well, and 

 among them some Russians that came 

 to me without a name. Try Lombard, 

 Glass Seedling, and McLaughlin. They 

 2 



are almost hardy here. The latter has 

 not failed yet, but it may." 



29. The Russet in the North. — Wdlit suc- 

 ceed in Carlton County ? [k. w i 



" In favored localities, but not gen- 

 erally. . If the subscriber lives on the 

 banks of the Ottawa he should succeed 

 with it, as also with the plums above 

 mentioned. [a. A. W.] 



30. To Grow Spruce and Linden from Seed. — 

 Please tell me the best method, as I loant 

 to experiment. 



[Andrew Johnson, Stratford.] 

 A. Gilchrist, Guelph. — All tree 

 seeds should bp covered very lightly ; 

 enough to hide them from view. A 

 sandy loam is preferable. European 

 Linden will not germinate until the 

 second year. Norway Spruce will grow 

 the first ; both require to be shaded. 



31. The Cut-leaf Weeping Birch. — How is 

 it propagated ? [a. J.] 



A. Gilchrist. — By grafting upon the 

 White or Yellow Birch Seedling. 



GENERAL TREATMENT OF FOREST 

 TREE SEEDS. 



32. Catalpa Speciosa. — Should the seeds 

 be planted in the spring ? 



[Wm. McIntosh, Newcastle.] 



For the benefit of the inquirer and 

 others interested in planting seeds of 

 forest trees, we select the following 

 from Bulletin No. 1 of the new Ex- 

 perimental Farm, Ottawa : — 



''Many of the tree seeds which 

 mature eai'ly are better sown soon after 

 they are gathered. This applies 

 especially to the several varieties of 

 elm and to the soft maple. The hard 

 maple, box elder and ash seeds keep 

 well over winter, provided they are 

 stored in a cool place and are not allowed 

 to get too dry. Acorns, nuts and stone 

 fruits are most successfully planted in 

 the autumn, but if kept over winter 



