10 



GRAPE-SPRAYING EXPERIMENTS IN MICHIGAN IN 1909. 



Table III. — Dates of spraying and fungicides used on thirteen expcrimentnl 

 plats in Mr. Tutile's vineyard, near Paw Paw, Mich., 1909 — Continued. 



Date of 

 spray- 



Fungicifle iiswl. 



Stage of growth. 



June 2 

 U 

 28 



July 5 

 14 

 2() 



Aug. 6 



June '.i 

 11 

 29 



July 

 14 

 2(i 



Aug. G 



June 3 

 11 

 28 



July (> 

 14 

 26 



Aug. 6 



June 3 

 11 

 30 



July 6 

 15 

 20 



Aug. () 



June 3 

 11 

 30 



July 6 

 1.-, 



June 3 

 U 

 30 



July (i 

 15 



I'l.AT 9. 



Neutral copper acetate . 

 do 



.do. 

 .do. 

 .do. 

 .do. 

 .do. 



Plat 10. 



Self-boiled lime-sulphur. 



do 



do 



do 



do 



Neutral copper acetate. . 

 do 



Plat 11. 



Commercial lime-sulphur. 



do 



do 



do 



do 



Neutral copper acetate — 

 do 



Plat 12. 



4-3-50 Bordeaux jnixture . 



do 



do 



do 



do 



do 



Neutral copper acetate . . . 



Plat 13. 



4-3-50 Bordeaux mixture. 



do 



do 



do 



do 



Plat 14. 



4-3- 



50 Bordeau.x mixture 



.....do 



do 



do 



4-3-50 Bordeaux mixture, with 2 pounds of soap 



Shoots 8 to IC inches long. 

 Nearly ready to blossom. 

 Just out of blossom. 

 Grapes about ^ inch in diameter. 

 Graijes about f, inch in diameter. 



Do. 

 Grapes about ^ inch in diameter. 



Shoots 8 to 10 inches long. 

 Nearly ready to blossom. 

 Just out of blo.ssom. 

 Grapes about J inch in diameter. 

 Grapes about .', inch in diameter. 



Do. 

 Grapes about g inch in diameter. 



Shoots 8 to 16 inches long. 

 Nearly ready to blossom. 

 Just out of blossom. 

 Grapes about g inch in diameter. 

 Grapes about ', inch in diameter. 



Do. 

 Grapes about | inch in diameter. 



Shoots 8 to 10 inches long. 

 Nearly ready to blossom. 

 Just out of blo.ssom. 

 Grapes about J inch in diameter. 

 Grapes about h inch in diameter. 



Do. 

 Grapes about g inch in diameter. 



Shoots 8 to 16 inches long. 

 Nearly ready to blossom. 

 Just out of blossom. 

 Grapes about g inch in diameter. 

 Grapes about I inch in diameter. 



Shoots S to 16 inches long. 

 Nearly ready to blo.ssom. 

 Just out of blos.som. 

 (irapes about jj inch in diameter. 

 Grapes about \ inch in diameter. 



Counts Avere iiuide of the berries on 1^,000 siverage bunches in this 

 vineyard; also of the good berries on 1,000 average bunches in each 

 sprayed plat and 2,000 bunches in the check plat. The amount of 

 rot was computed from these data. In the check plat the percentage 

 of rot on a row next to a sprayed plat was found and also on a row 

 in the middle of the plat, in order to determine whether in spraying 

 one row the mixture would be carried over to the next enough to 

 inllucnce the amount of rot on it. The percentage of rot, howevei'. 

 was found to be greater on the outside row next the sprayed plat than 

 on the one in the middle. This would indicate that the error in this 



ICir. G5] 



