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THE CANADIAN HORTICULTURIST 



much brighter on the sprayed vines than on 

 the unsprayed. At Grimsby tlic I'dack Rot 

 was found on the vines which had been un- 

 sprayed, and. as at Winona, it was found 

 that i)ractically no damage had been done 

 by the mildew, which was quite evident on 

 the unsprayed rows and absent from the 

 sprayed rows. 



At Beamsville the check rows were the 

 only ones that had Black Rot to any extent, 

 and the owner of the vineyard was one of 

 the first to recognize the fact that the spray- 

 ing had kept the lilack Rot away from his 

 vines. At Jordan the row which only had 

 the blue stone treatment in April showed 

 considerable mildew. There was, how- 

 ever, one row of Moyer grapes which had 

 been sprayed with Bordeaux five times dur- 

 ing the season and which showed more 

 Black Rot than any other row. The owner 

 states that last year the grapes on this row 

 were completely ruined by Black Rot. 



At St. Catharines the results were very 

 similar to those observed at Grimsby and 

 Winona, the unsprayed vines showing the 

 most Black Rot and mildew. An interest- 

 ing lesson by way of comparison may be 

 drawn from a study of a neighboring vine- 

 yard which had never been sprayed. Al- 

 though this is a very favorable season for 

 grapes, yet this grapery showed a great deal 

 of Bird's Eye Rot, Mildew, and Black Rot. 



PETRIFIED GRAPES. 

 At Xiagara-on-the-Lake, ]\Ir. Jarvis re- 

 ports, the sprayed vines were very clean, 

 but the unsprayed vines showed consider- 

 able Black Rot and Bird's Eye. At Stam- 

 ford, Mr. Jarvis also reports, there was 

 practically little difference between the 

 sprayed and unsprayed vines — both being 



The power sprayer possesses the follow- 

 ing advantages: ist, the same number of 

 men will cover two to three times the tree 

 surface ; 2n.d, only about one-half the quan- 

 tity of spraying mixture is needed ; 3rd, the 

 work is much better and more effectively 

 done. — (W. H. Brand, Vinemount, Ont. 



ver\' free from disease. At Queenston a 

 splendid object lesson was observed in a 

 vineyard of Niagaras. On the check (un- 

 sprayed) vines " petrified " grapes and 

 Downy Mildew were in evidence, but were 

 entirely absent from the sprayed vines. 

 The owner states that the Delawares which 

 were sprayed were much better and cleaner 

 than those which had been left unsprayed. 



A very interesting side experiment was 

 carried out in a vineyard along the Niagara 

 river road. Only a portion of this vine- 

 yard was sprayed, but the grapes on the un- 

 sprayed portion were shelling very badly, 

 and many of them were " petrified." Downy 

 Mildew was very abundant in the unspray- 

 ed portion, and there seems to be no doubt 

 that the " petrified " grape is due to the at- 

 tack of that disease. The sprayed part of 

 this vineyard had but one application, in 

 July, but even with but a single application 

 the difference between the sprayed and un- 

 sprayed vines was very evident. 



In most of the orchards considerable in- 

 jury was done by the Grape Berry Moth. 

 Should this insect continue to trouble us for 

 another season, it may be necessary to add 

 some arsenic solution to the Bordeaux, es- 

 pecially during the June and July sprayings. 



On account of the tmsatisfactory condi- 

 tion of the season for spraying experi- 

 ments the Government will be urged to con- 

 duct the same series of experiments in the 

 same vineyards for another season at least. 

 Grape growing is a very large industry in 

 the Niagara region, and it is very important 

 that the grape grower should have definite 

 information as to the best yfO})^ of controll- 

 ing diseases on the grape in the most unfa- 

 vorable seasons. 



It will not do to over-estimate the results 

 of spraying, but I am satisfied that, with 

 one or two exceptions, the growers about 

 Ingersoll, in whose orchards we used the 

 government power sprayer, were well 

 pleased with the results. — (J. C. Harris, 

 Ingersoll, Ont. 



