17 



mixture, dividinir the vineyards into tliree plots for tills purpose, one 

 kiud being applied to each. 



May 20tli, just before the blossoms opened, and June 13th, just 

 after the fruit had set, sprayed with the Bordeaux mixture with Paris 

 green, one pound to 2(i0 gallons. 



July 6th. sprayed with the Bordeaux mixture alone, and Aug. 7th 

 with the aramoniacal carbonate of copper. Had the weather 

 been moist during July the amraoniacal carbonate would have been 

 used about the 20th of the month. 



In the experimental viiieyard where over 120 varieties are planted, 

 two vines of each kiud, one vine was sprayed and the other not 

 sprayed. 



Results. The accompanying illustrations show the results better 

 than can be done in any otiier way. 



Plate 2 shows a vine sprayed, and Plate 3 one unsprayed. Plate 

 4 shows a part of one of the rows where the first vine was sprayed, 

 the second unsprayed, the third sprayed, and the fourth unsprayed, 

 etc. The benefit obtained was as marked throughout the vineyard, 

 and could be seen as far as the vines could be distinguished from 

 other objects. Plate 5 shows a bunch of fruit from a sprayed, and 

 one from an unsprayed vine. 



EXPERIMENT NO. 6. 



POTATOES. 



To test the value of combined fungicides and insecticides, a field 

 of about one acre of [potatoes was divided into twelve plots of six 

 rows each. June 30th, sprayed all with Paris green, one pound to 200 

 gallons of water. July 14th treated as follows : 

 Row No. 1, with Bordeaux mixture and Paris green, 



1 pound to 100 gallons wnter 



2, '' same, 



3, " same, 



4, " Sulphate of copper, 

 5, 



6, " Ammoniacal carbonate of copper, 

 1 pound to 25 gallons water 



7, " Paris green and Plaster, 1 " 200 pounds 



8, •' Sludgite. 



9, Check. 



Nos. 10, 11 and 12 treated the same as Nos. 1, 2 and 3. 

 2 



