tie (anadian HorticOltCrist 



Volume XXVIII 



OCTOBER, 1905 



• mm 



Number 10 



THE SPRAYING DEMONSTRATIONS 



PROF. WM. LOCHHEAD, O. A. C, GUELPH. 



ALTHOUGH the results of the experi- 

 ments conducted this season in tlie 

 Niagara district, spra}ing grr-pes, have not 

 been conclusive, yet the careful and impar- 

 tial observer has been shown that those vines 

 which were sprayed are freer from disease 

 than those which were unsprayed. The 

 main object of the experiments was to test 

 the efficiency of the preparations which had 

 been recommended for the control of the 

 chief insect and fungous diseases of the 

 vineyard and orchard, especially for the 

 control of the grape rots and Siii Jose scale. 



The work was begun and charted by my- 

 self, but was carried on in my absence by 

 Mr. P. W. Hodgetts, Department of Agri- 

 culture, Toronto; Mr. T. D. Jarvis, O. A. 

 C, Guelpli, and Mr. Andrew Haynes, bt.. 

 Catharines. Experiments were carried on 

 at the following points : Mr. .viurray Pet- 

 tit's, Winona ; Mr. Ambrose Pettit's, Grims- 

 by ; ^iv. R. Kelly's, Beamsville ; ^Ir. Bart- 

 lett's, Beamsville; Mr. J. Fretz's, Jordan; 

 \lr. S. Overholt's, Jordan ; ^Nlr. Geo. Rob- 

 ertson's, St. Catharines ; Industrial Home, 

 St. Catharine^'I'^i^r. S. Shearer's, Xiagara- 

 on-the-Lake : 'Sir. Porter Aaams', Queens- 

 ton, and ^Ir. Berriman's, Stamford. 



The first experiments began at Winona, 

 April 13, while the trees and vines were still 

 dormant. Applications of lime-sulphur 

 were applied in some orchards for the con- 

 trol of the San Jose scale. In most cases 



this mixture was made without the applica- 

 tion of steam. In the vineyards a one per 

 cent, solution (4 pounds in a barrel of 

 water) of copper sulphate was applied to 

 certain check rows. Later applications of 

 Bordeaux mixture were made in the vine- 

 yards about the second week in June, the 

 first and third weeks in July, and the first 

 and second weeks in August. A chart of 

 the difi^erent experimental vineyards was 

 carefully prepared at the outset and the plan 

 was adhered to as nearly as possible 

 throughout the season. ±he object of the 

 chart was to determine what sprayings were 

 absolutely essential and what sprayings were 

 unessential for the control of the grape rots. 

 Rows, or portions of rows, were left un- 

 sprayed as checks in every vineyard. 



During September I visited the different 

 experimental vineyards. The season has 

 been a most favorable one for the grape 

 grower. Even the most careless grower 

 has had very little rot to contend with. For 

 this very reasan the season has been an un- 

 favorable one for experimentation. Prac- 

 tically no dift'erence was noticed as to the 

 effects of the dift'erent applications. At 

 Winona the check vines, which were left un- 

 spraved, had considerable mildew, but the 

 grapes will not be injured to any extent. In 

 a season, such as that of last year, these 

 mildewed grapes would have been totally 

 destroved. The color of the foliage was 



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