-^ Qti^tioQ (Dralo^r. ^ 



Ink for Zinc Labels. 



57 1. Sir, — May 1 ask what kind of a pencil you use on the zinc labels attached to 

 the trees you send out ; or do you dip the zinc in some chemical that makes the writing- 

 show so plainly ? 



Benjamin Buchanan, Farmingdale, III. 



Answer by Mr. John Craig, Horticulturist, Ottawa. 



The names were written with zinc label ink, made according to the following 



recipe : 



Sulphate of copper, i oz. 



Sal ammoniac, io oz. 



Lamp black, yi oz. 



Water, l /2 pint. 



This writing fluid I have used for several years and find it an exceedingly satis- 

 factory means of preserving the names of the different varieties of frnits in an 

 orchard. 



Diseased Rose and Violet Leaves. 



.■»?.■». Sir, — I enclose a leaf, please tell me what the insect is on it. I said red 

 spider, but was told it was not. 



F. Tobin, Fergus. 



Reply by Mr. John Craig, Horticulturist, Central Experimental Farm, Ottawa. 



The rose leaves seem to be affected by an attack of the red spider. This 

 insect flourishes in a dry atmosphere, and, therefore, one of the best remedies is 

 to frequently syringe the plants with water. Sulphur fumes are also effective. 

 Pyrethrum mixed with water may also be used with good results. The violet 

 leaf seems to be affected with some sort of mildew, which I do not recognize. 

 The best advice that can be given is to pick off and destroy the diseased leaves. 



( For our readers to answer, J 



27. Blenheim Orange. — What is the value of the Blenheim Orange apple, commer- 

 cially ? How does it compare with the Northern Spy for productiveness? — A. S. D., 

 Seaforth. 



28. Plum Knot. — In the vicinity of Collingwood, thousands of plum trees are dying 

 of black knot. Could you say any thing concerning its ravages in other sections? — J. D. , 

 Giarksbargh. 



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