GRAPE-SPRAYING EXPERIMENTS IN MICHIGAN IN 1909, 9 



tions and trailers manipulated by liaiul for llie additional ones. Plat 

 6 was the check and was not sprayed, though cultivated the same as 

 the rest. The treatment given the different plats was as follows: 



Table III. — Dates of tiinayiny and funyicldcs used on thirteen experimental 

 plats in Mr. Tuttle's vineyard, near Paw Pate, Mich., 1909. 



Date of 



spray- 

 ing". 



June 



Jiilv 



Aug. 



1 



11 

 28 



5 

 14 

 24 



<'> 



Juim 1 

 11 

 28 



July 5 

 14 

 24 



Aug. 6 



June 



July 



Aug. 



June 



July 



Aug. 



June 2 

 II 

 28 



July 5 

 14 

 24 



Aug. 6 



June 2 

 11 

 28 



July 5 

 14 

 20 



Aug. 6 



June 



July 



Aug. 



Fungicirte used. 



I'l-.VT 1. 



4-4-50 Bordeaux mixture. 



do 



do 



do 



do 



do 



Neutral copper acetate 



I'LAT 2. 



Stage of growth. 



4-3-50 Bordeaux mixture. 



do 



do 



do 



do 



....do 



Neutral copper acetate . . . 



Shoots 8 to If; inches long. 

 Nearly ready to blossom. 

 Just out of hlossom. 

 Orapes about J inch in diameter. 

 Grapes about f. inch in diameter. 



Do. 

 Grapes about | inch in diameter. 



Shoots 8 to 16 inches long. 

 Nearly ready to blossom. 

 Just out of blossom. 

 Grapes about J inch in diameter. 

 Grapes about .'. inch in diameter. 



Do. 

 Grapes about f inch in diameter. 



I'LVT :i. 



4-3-50 Bordeaux mixture, with 2 i)ounds of iron sul- 

 phate. 



do J 



do 



.. -do 



- ..do 



.do ''.'..... 



Neutral copper acetate 



Shoots 8 to Ifi inches long. 



Nearly ready to blossom. 

 Just out of t)lossom. 

 Grapes about J inch in diameter. 

 Grapes about >', inch in diameter. 



Do. 

 Grapes about | inch in diameter. 



I'r.AT 4. 



4-3-50 Bordeaux mixture, with 2 pounds of .soap , ShootsS to Ui inches long. 



do , , Nearly ready to blossom. 



'J" t Just out of blossom. 



"^^ - Grapes about g inch in diameter. 



■-.■-''" Grapes about .\ inch in diameter. 



Without soap , Do. 



Neutral copper acetate '.'.'.'..'. G rapes about f inch in diameter. 



Plat 



4-2-50 Bordeaux mixture. 

 do 



.do. 

 .do. 

 .do. 

 .do. 



Neutral copper acetate. 



I'LAT 



3-2-50 Bordeaux mixture. 

 do 



.do. 

 .do. 

 -do. 

 .do. 



Neutral copper acetate. 



Plat 8. 



Ammoniacal solution of copper carbonate. 



do 



...do 



...do 



. ...do ■ 



....do 



....do 



Shoots 8 to Hi inches long. 

 Nearly ready to blossom. 

 Just out of blossom. 

 Grapes about g inch in diameter. 

 Grapes about h inch in diameter. 



Do. 

 Grapes about | inch in diameter. 



Shoots 8 to 16 inches long. 

 Nearly ready to blossom. 

 Just out of blos.som. 

 Grapes about a inch in diameter. 

 Grapes about i inch in diameter. 



Do. 

 Grapes about | inch in diameter. 



Shoots S to IG inches long. 

 Nearly ready to blossom. 

 Just out of blossom. 

 Grapes about } inch in diameter. 

 Grapes about '. inch In diameter. 



Do. 

 Grapes about | inch in diam.eter. 



ICir. G5] 



