;N^ew York Agkicultueax, Experiment Station. 325 



during the season wliich seemed to favor a rapid growtli of mil- 

 dew. The disease was first noticed May 25. It was quite gen- 

 erally distributed throughout the plantation Lut was most abun- 

 dant on the untreated rows. Th'e fruit was marketed green the 

 latter part of June. 



Tests in 1899. — The weather was unfavorable to early growth 

 so the first spraying was not made until April 15. Later spray- 

 ings were made April 25, May 5, 15, 25, June 6 and 12. 



The season was dry and the attack of mildew was compara- 

 tively light, although the bushes made an excellent growth and 

 set a fair crop of fruit. Mildew appeared early in June and was 

 especially noticeable on the check rows and on the under side of 

 bushes sprayed with Bordeaux mixture. The young growth was 

 exempt from the disease. The fruit was picked the last of June. 



RESULTS. 



Table I shows the different strengths of the various fungicides 

 used and the percentage of mildew for the three years in each 

 series and each treatment in the series. 



Table I. — Percentage of Mildewed Frtiit fob Theee Seasons. 



Series I. Series II. Peries III. 



Spraying begfun Spraying begun Spraying begun 



Fungicide. very early. meriium early. late. 



Seven applica- Six applica- Five applica- 

 tions, tions. liions. 



T^97. 189S. 189a TsO?. 1898. 1699^ 1897. 1898. 1899? 



•Bordeaux mixture: 



1 to 11 formula 37.4 66.7 60.6 29.1 80.9 53.2 58. 90.5 63. 



Potassium sulphide: 



1 oz. to 2 gals water. . 6.6 29.3 5.5 12.3 42.7 3.5 11.5 37.9 15.1 



1 oz. to 3 gals, water . . 5. 50.9 0.6 15.1 69.5 7.5 13. 66.3 6.6 



Formalin: 



1 oz. to 1 gal. water. . . 48.8 59.9 S.9 78.3 80.9 11.2 56. 63.4 8.8 



1 oz. to 2 gals, water. . 59.1 84. 15. 84.7 91.9 14.9 71.4 96.8 37.5 



1 oz. to 4 gals, water. . 52.6 95.1 16.1 65. 86.7 16.2 70.4 89.1 41.9 



Checks 57.7 80.8 22.6 78.7 98. 28.5 78.7 95.7 30.6 



Lysol : 



1 oz. to 1 gal. water. . . 24.5 74.2 6.6 ' 



1 oz. to 2 gals, water . . 56.8 81.6 8.2 



1 oz. to 4 gals, water . . 37.1 65.1 10.9 



* Last three treatments in each series in 1897, and last two treatments in 

 each series in 1898 and 1899, potassium sulphide, 1 ounce to 2 gallons water. 



