108 THE CROWN-GALL AND HAIRY-ROOT OF THE APPLE TREE. 
Page. 
Trees, stand, relation of defective root grafting. ~:~ 2255-25222) 4- 4 eee 50 
susceptibility of varieties to disease... .... Fae a SN Soca er eu se 41-43, 85 
use of hairy-root pieces in grafting, effect on stand...................-. Rs | 
varieties, in experimental orchards for study of disease........... 37, 39, 85, 86 
less resistant: to diseases 25257 ee eee 74 
Tumors, stem, description, occurrences etee - -4. eee eee ee 15 
variant name for hairy-root-: 2:5 50-22 ee See 9 
Utah, crown-gall, occurrence.on budded trees-= = 2322s eee 19 
Van Deman, H. E., observations on trees affected with crown-gall........... 32 
Virginia crab apple. See Apple, crab, Virginia. 
crown-gall, occurrence on-budded trees- 2-422 2 ee ee = ee 19 
Von Schrenk, Hermann. See Schrenk, Hermann von. 
Walbridge apple. See Apple, Walbridge. 
Waxed paper. See Paper, waxed. 
Waxing, root: gratts,, method .¢ 200-20 1s. See Sk 62 
Wealthy apple. See Apple, Wealthy. 
Whitney apple. See Apple, Whitney: 
Wickson, E. J., statement on effect of root knots on fruit trees...............- 30 
relation of development to crown-gall and hairy- 
MOOG fd sel See ee ay ae rea tee eee 40 
Wolf River apple. See Apple, Woli River. 
Woodworth, C. W., statement on effect of crown-gall on plants................ 30 
treatment of affected stock, recommendation. ............ 44 
Woolly aphis. See Aphis, woolly. . 
knot, description, occurrence, ete 2. 2 ie. ee eee eee ee 14, 70, 71 
occurrence on trees imported from New Zealand................- 1 
variant name for hairy-ro0te-s- 3) 9-22 Sia ee 9 
root, variant, name for hairy-roo0t. =. 3) = Sa eee 9 
Wounds; formation of callus; experiment. 22-5532. 32 9-22. eee 46-48 
relation to crown-gall and hairy-root in seedlings, experiments.. 13, 16-18, 72 
to be-avoided 550. Se eee eee SS ea ee 72, 74 
Wrapping, root grafts, methods, experiments, results, etc....-.....-- 61-65, 74, 91-92 
summary of results)... io ee ee ee 73, 74 
Wurzelkropé, effect on apple -itreesan Germanys a 5e = pe 30 
occurrence in foreien: coumities 2 3-- 2.52 se ee eee eee 11, 12 
Yellow Bellflower apple. See Apple, Yellow Bellflower. 
Transparent apple. See Apple, Yellow Transparent. 
York Imperial apple. See Apple, York Imperial. 
186 
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