80 THE CROWN-GALL AND HAIRY-ROOT OF THE APPLE TREE. 
TABLES GIVING THE RESULTS OF EXPERIMENTS IN THE STUDY 
OF CROWN-GALL AND HAIRY-ROOT. 4 
TABLE |[.—Development of crown-gall and hairy-root on transplanted seedlings in the 
NUIsery. 
Ageof | Number of| Seedlings, | Seedlings, 
seedlings. | seedlings. galled. hairy. 
Years. Per cent. Per cent. 
1 350 0.6 3.1 
2 116 1.4 ib bey/ 
3 114 1.5 9.4 
TaBLe II.—Comparative development of crown-gall on grafted and budded trees in the 
nursery. 
| 
Grafted trees. Budded trees. Decrease 
Variety. Year |S data 
Smooth. | Galled. | Smooth. | Galled. | _ trees. 
: Per cent. | Per cent. | Per cent. | Per cent. | Per cent. 
BeneDaviSeeec. cence ercce ie a nee ee 1904 78 22 91 13 
On aos eae 5 oe on Re eee ee 1905 60 40 92 8 32 
BlacksAMNEGle se ee ee A eee 1904 89 11 99 iL 10 
PIMOS. 325 Soo sae ean ee eee etter 1905 70 30 99 1 29 
Olden bute. 2. bias. sokee = Soe sees eee 1904 83 17 96 4 13 
ORS eee ee wer ee See ee eee 1904 89 11 99 1 10 
Wieal this See ean ane See eee 1904 54 46 93 if 39 
Ce et eae ry Ne aa Te Gare nea eae are 1904 83 17 97 3 14 
1D ea eee ee ees eras 6 Sep ie 1904 88 12 98 2 10 
Wellowsiransparentesece --- sees ee 1904 94 6 99 1 5 
Oe Oats Soe ert ane eee 1904 89 11 92 8 3 
The data in Table II are given from a number of localities in the 
Mississippi Valley, Virginia, and North Carolina.. The names of the 
nurseries are withheld because the reports were confidential. At 
the time the reports were received, most nurserymen designated as 
“crown-gall” all forms of crown-gall and hairy-root, and in the 
table they are combined under the term “galled.” 
TABLE II].—Results on the health of trees of varying the depth of the union in planting 
: root grafts. 
Trees with long scions. | Trees with short scions. 
Year. 
Number. | Diseased.6 | Number. | Diseased.® 
Per cent. Per cent. 
TA OF gs ee ik ee a Or a ee 754 13352 769 13E5 
1LQOB e oih5 Ss SC ia eo ys eae 980 35.0 870 48.4 
Total Ses Ee ea as oh Oe Sn eR en eden 1,734 25.5 1, 639 32.0° 
a In these tables both forms of crown-gall are included under the term ‘“‘ galled,”’ and all of the forms 
of hairy-root under the term “‘hairy,’’ unless otherwise specified. The word ‘‘smooth”’ is used to 
designate trees free from the disease. 
6 In this table the term ‘‘diseased”’ includes ‘‘galled”’ and ‘‘hairy”’ trees. 
186 
