178 



EXPERIMENTAL FARMS 



9-10 EDWARD VII., A. 1910 



In the results set forth below we have the averages for the past seven seasons of 

 the three varieties discussed. The data for the past year are, on the whole, very satis- 

 factory, betokening the fact that beets might be grown in Canada over a very wide 

 range, and that these, in point of richness, would be fully equal to those employed in 

 the United States and the continent of Europe for sugar extraction. 



Average Percentage of Sugar in Juice in Sugar Beets Grown on the Experimental 



Farms, 1908. 



Locality. 



Nappan, N. S 



Ottawa, Ont 



Brandon, Man 



Indian Itead, Saak . . 



Lethbridge, Alta — irrigated .... 

 II II nun-irrigated. 



Lacombe, Alta 



Agassiz, B.C 



1902. 



15.87 

 16.77 



15.15 



1903. 



15.. S3 

 15.34 

 11.36 

 16.54 



17.44 



1904. 



14.41 

 l(v91 

 16.62 

 15.24 



8.10 



1905. 



16.52 

 12.45 

 11.09 

 14.94 



17.32 



1906. 



17.08 

 14.37 

 15.50 

 14.91 



14.23 



1907. 



15.44 

 16.99 

 15.92 



13.34 

 17.65 



1908. 



17 53 

 16.30 

 15.82 

 15. 60 

 16.09 

 16.73 

 11.21 

 17.15 



INSECTICIDES AND FUNGICIDES. 



ARSENATE OF LEAD. 



Though first proposed for the destruction of leaf-eating insects as long ago as 

 1892, arsenate of lead has only received general recognition in Canada as a substitute 

 for Paris green during the last three or four years. Judging, however, from the cor- 

 respondence regarding this insecticide during the past two seasons, it is growing 

 rapidly in popularity, having in certain districts already established an excellent repu- 

 tation among orchardists and potato growers. 



Though possibly a somewhat slower poison than Paris green, it has properties 

 which gives it a certain advantage over this well-known insecticide. In the first place 

 it is non-injurious to foliage, and, therefore, the spray can be used at any desired 

 strength without fear of the leaves being in the least affected. Secondly, it has greater 

 adhesive powers than Paris green, and consequently the period of effectiveness of its 

 spray is longer. And, lastly, owing to its fine state of division it remains longer in 

 suspension than Paris green after being mixed with water, a matter that contributes 

 considerably towards a uniform application of the poison in the spray. 



Arsenate of lead for insecticidal purposes is prepared and put upon the market 

 chiefly in the form of a paste, the spray being made by simply adding the required 

 weight of paste to the barrel of 40 gallons of water and stirring the mixture. The 

 strength of the spray, to be at once effective and economic, is as yet an open question. 

 Most entomologists, at the present day, advocate for codling moth, potato beetle, &c., 

 from 2 lbs. to 3 lbs. of the commercial paste per 40 gallons of water, and the direc- 

 tions as printed by the manufacturers usually call for amounts within these limits. 

 As this insecticide is not injurious to foliage, larger quantities than these may be used 

 if desired, but such are, of course, more expensive. Certain authorities recommend 5 

 lbs. to 6 lbs. of the paste per 40 gallons, but it is doubtful if such a strength is neces- 

 sary for general use. 



There are practical difficulties in the manufacture of commercial arsenate of lead 

 paste which may be said to almost preclude the po^ihility of turning out continuously 

 a product uniform in composition. The aim of the larger number of manufacturers, 

 however, is to place upon the market a paste containing, approximately, 40 per cent 



