Recent Studies on Peach Yellows and Little Peach 51 



graph shows that the annual losses remained below 3 per cent from 

 1907 to 1913, a period of 6 years, and below 5 per cent until 1917, 

 a period of 10 years. In the period of three years from 1917 to 

 1920 the losses jumped from an average of about 6 per cent to 

 over 20 per cent. 



.Losses Small for Four or Five Years 



It is quite noticeable that the losses in general are quite small until 

 the orchards are at least four or five years of age, but during epi- 

 demics the more recently planted orchards appear as likely to suffer 

 as the older ones. 



30 



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1907 1 90S 1909 1910 1911 I9IZ 1913 1914 I $15 1916 1917 1918 1919 1910 



Fig. 25 — Graphic Illustration of Losses From Yellows and Little 

 Peach in Vineland Orchards From 1907 to 1920 



It may be noted that orchard no. 3, set in 1912, suffered even 

 more severely after 1916 than no. 1, which was set in 1907. 



