Nov. i6, 1914) Pecan Rosette 163 



ORCHARD RECORDS 



Rosette records for periods varying from 2 to 1 2 years have been kept 

 in several orchards in Georgia, Florida, and South Carolina. 



Of 159 trees observed in the J. B. Wight orchard for three successive 

 seasons (1902 to 1904), 24 were healthy for all three seasons, 17 were 

 healthy at the beginning, but later contracted the disease, 13 had rosette, 

 but recovered, 108 were rosetted throughout the period, and 7 fluctuated 

 each season. 



Eighty trees in the same orchard were observed in 1902, 1903, 1904, 

 1912, and 1913. So far as these observations go, 30 trees remained nor- 

 mal throughout the period, 7 were normal, but contracted the rosette, 12 

 were rosetted, but recovered, 8 were rosetted throughout, and 21 fluctu- 

 ated back and forth between the normal and rosetted condition. 



Observations on 274 trees in the same orchard during 1912 showed 136 

 trees with the rosette, and during the following season 35 trees more had 

 contracted the disease. The cultivation and fertilization had not been 

 varied. 



In a 40-acre block of the Davenport orchard at Belleview, Fla., con- 

 taining 1,069 trees, 389 had the rosette in 1912 and 256 in 1913. All had 

 received the same treatment, except for the few trees used in the copper- 

 sulphate test, and as previously noted this treatment gave negative 

 results. Of the three varieties present, 19 per cent of the Van Deman, 

 25 per cent of the Stuart, and 28 per cent of the Teche pecans had rosette 

 in 1912. 



Sixty-two soil borings were made to 6 and 9 feet from the surface and 

 in the vicinity of both healthy and rosetted trees. Of 31 trees in a clay 

 to sandy -clay subsoil, 13 had the rosette and 18 were normal. Of 23 

 trees in a sandy subsoil, 9 were rosetted and 14 were normal. Of 8 

 trees in a subsoil containing considerable quantities of a soft lime rock, 

 all were healthy. In the first two groups the difference in the number 

 of diseased and healthy trees was not conspicuous. On account of the 

 entire absence of rosette in the third group, partial analyses of the subsoil 

 around three trees were made. In sample No. i the percentages of lime, 

 magnesium, and phosphorus, computed as the oxids, were 9.68, 0.82, 

 and 8.32, respectively; in sample No. 2, 5.42, 1.09, and 6.03; and in 

 sample No. 3, 0.58, 0.99, and 3.44. More or less clay was present in all 

 the samples, and in No. 2 there was a considerable admixture of creolin. 



In a small orchard of 96 trees belonging to Mr. G. G. Gibbs, at Talla- 

 hassee, Fla., 38 trees were rosetted in 1912, and during the following 

 season 4 of these recovered. In another orchard of 1 16 trees on the same 

 fann, with similar topography and apparently similar soil, 6 were rosetted 

 in 1 91 2 and 12 the following season. 



In the G. W. Saxon orchard of 231 trees at Tallahassee, Fla., 125 trees 

 liad rosette in 191 2 and 173 in 191 3. Most of the orchard had received 



