66« 



Table 63, - Proportion of vineyard acreage sprayed and dusted, 



by areas, 1928 





: Porcontag( 



3 of viiiGvard 













acreage t 



sprayer 



1 the 



: Por( 



rentage 



of vineyard 





: indicated i 



iiunber 



of times 





acreage 





Area 















: Dusted 



: Neither 

 : sprayed 







: 1 



: 2 



: 3 



: 4 



: 5 ^ 



:Dust- 



: and 



: nor 



: Total 





', 











: ed 



: sprayed 



: dusted 







: Per- 



: Per- 



! Per- 



: Fer- 



: Per- 



. per- 



: Per- 



: Per- 



:Per- 





: cent 



: cent 



: cent 



: cent' 



: cent 



: cent 



: cent 



; cent 



;cent 



Niagara Co., N.Y. 



» 



: 11.0 







• 4 





» 





: 89.0 



: 100.0 



Chantauqua Co», N*Y« 



: 23.4 



: 0.2 



: 0.1 





1 ^ 



? ;^- 



: 73,1 ; 



: 100.0 



Finger Lakes, N^Y. 



: 26,4; 



> 8,4 



: 0.5; 







: 5,0 



; ' 



: 59.7 



: 100.0 



Hudson Valley, N.Y. : 



: 46,0; 



: 13.1: 



0.2: 







; 13,9! 



' t 



; 26,8 : 



: 100,0 



North East, Pa. : 



42,9; 



1 



10,0: 



3.7: 







18.5: 





; 24.9 : 



100.0 



Michi^n : 



8.5: 



19.5: 



17.1: 



3,3: 





32.3: 



3.7 '• 



: 15.6 : 



100,0 



G-irard, Pa. : 



12.4: 



61,6: 



4.oi 



1.1: 





10.1: 





10.8 ': 



100.0 



Arkansas (19S9) : 



5,0: 



27.9: 



45.2: 



17.2: 



^a\ 







1.3 : 



100.0 



All areas : 



22,4: 



13.4: 



9,5: 



2,5: 



0.3: 



13.5: 



0.8 : 



37.6 ': 



100.0 



About one third of the Michigan vineyards studied rjore sprayed or 

 dusted tv/ice, and one third, three times, during the season. Vineyards sprayed 

 3 or more times produced more than did vineya3?ds sprayed less than 3 times, but 

 on the average, the vineyards sprayed the greatest number of times were also 

 cared for more intensively in other ways. In 1928, the average return per hour 

 of labor spent on those more intensively cared-for vineyards was about the 

 same as the return for labor spent on the less intensively cared-for vineyards. 



Only 26.9 percent of the vineyard acreage studied in Chautauqua County 

 was sprayed or dusted in 1928. The sprayed vineyards yielded about the some 

 as the vineyards that wore not sprayed. Probably the vineyards in the Chau- 

 tauqua-Erie belt are protected from biack rot by Lake Eric. The lake tends to 

 moderate the summer temperature and to keep the air consta.ntly moving.; this 

 dries the foliage quickly after a rain. A majority of the 'North East growers 

 interviewed applied one spray in 1928. 



The extent of diseases and insects, as well as the effectiveness of 

 spraying, varies from year to year depending sanewhat upon weather conditions. 

 Sprays may be considored as efficient v/eapons with which to reduce or eliminate 



