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14
J
ournal of
the
A
merican
P
omological
S
ociety
Table 3.
The effect of plant growth regulator (PGR) treatments on flexural strength (Force in Newton), graft cross-sectional area (GCSA), scion cross-sectional area
(SCSA), force per graft cross-sectional area (F/GCSA), force per scion cross-sectional area (F/SCSA), and height of ‘Scilate’ and ‘Gala’ apples grafted on ‘Geneva 41’
rootstock. Values are averaged over scion cultivar, and treatments are ranked for each parameter.
PGR Application
Force GCSA SCSA F/GCSA F/SCSA Height
(N)
(cm
2
)
(cm
2
)
(N·cm
-2
)
(N·cm
-2
) (cm)
Mean Rank Mean Rank Mean Rank Mean Rank Mean Rank Mean Rank
BA
Latex2
566
1
8.56
1
1.94
1
65.9
7
292
4
204
4
S-ABA Foliar1
511
2
6.78
12
1.71
9
75.3
1
301
2
204
5
GA
4+7
Latex1
483
3
7.27
6
1.93
2
65.2
9
249
17
196
11
NAA
Latex1
468
4
7.29
5
1.63
11
63.1
12
289
6
206
1
S-ABA Latex1
461
5
6.89
10
1.81
6
66.4
6
252
16
205
2
Ethephon Latex1
460
6
7.70
2
1.77
7
60.3
19
264
12
200
6
BA
Latex1
451
7
6.90
9
1.84
4
65.2
8
242
20
193
19
Control
Latex1
451
8
6.73
13
1.60
12
67.1
4
287
8
196
12
NAA
Foliar2
445
9
7.49
4
1.74
8
62.9
13
261
13
195
14
S-ABA Foliar2
444
10
6.23
20
1.53
15
70.7
3
290
5
193
17
S-ABA Latex2
441
11
7.57
3
1.92
3
57.9
20
229
21
199
7
GA47
Latex2
439
12
7.04
7
1.83
5
62.3
15
242
19
197
8
IBA
Latex1
428
13
6.02
22
1.44
20
73.3
2
302
1
205
3
ACC
Latex1
428
14
6.98
8
1.69
10
62.4
14
257
14
194
16
ACC
Foliar2
428
15
6.69
14
1.47
18
63.7
10
293
3
190
21
NAA
Foliar1
417
16
6.26
18
1.50
16
66.5
5
280
9
193
18
Ethephon Latex2
404
17
6.23
19
1.48
17
63.5
11
271
10
192
20
ACC
Latex2
396
18
6.43
16
1.58
13
61.0
17
252
15
196
10
IBA
Latex2
394
19
6.86
11
1.42
22
56.6
21
270
11
194
15
NAA
Latex2
394
20
6.49
15
1.42
21
61.1
16
288
7
197
9
Control
Untreated 362
21
6.05
21
1.46
19
60.5
18
247
18
190
22
ACC
Foliar1
345
22
6.26
17
1.56
14
55.9
22
224
22
195
13