|
|
Incidence of Scab and
Foliage Condition on Pecan Trees Grown Without Fungicide or Insecticide Sprays
in a Humid Region
|
Table 1. Origin of selections included in this
report.
|
|
Selection
|
Origin
|
|
|
|
|
Adams 1
|
Georgia
seedling
|
|
|
|
Adams 2
|
Georgia
seedling
|
|
|
|
Adams 5
|
Georgia
seedling
|
|
|
|
Barton
|
Schley x
Success
|
|
|
|
Buchel 1
|
Texas
seedling
|
|
|
|
Carter
|
Mississippi
seedling
|
|
|
Curtis
|
Florida
seedling
|
|
|
|
Desirable
|
(Jewett x
Success)?
|
|
|
Elliott
|
Florida
seedling
|
|
|
|
Farley
|
Florida
seedling
|
|
|
|
Gafford
|
Alabama
seedling
|
|
|
Gloria
Grande
|
South
Carolina seedling
|
|
|
GRE 14-20
|
Georgia
seedling
|
|
|
|
GRE 29-1
|
Georgia
seedling
|
|
|
|
Hughes
|
Mississippi
seedling
|
|
|
Jenkins
|
Mississippi
seedling
|
|
|
Kanza
|
Major x
Shoshoni
|
|
|
|
Lineberger
|
Georgia
seedling
|
|
|
|
McMillan
|
Alabama
seedling
|
|
|
Miss L
|
Louisiana
native
|
|
|
|
Mount
|
Oklahoma
native
|
|
|
|
Naomi
Mallette
|
Alabama
seedling
|
|
|
Prilop
|
Texas native
|
|
|
|
Register
|
Alabama
seedling
|
|
|
Schutz 1
|
Texas native
|
|
|
|
Seminole
|
Florida
seedling
|
|
|
|
Stuart
|
Alabama
seedling
|
|
|
Syrup Mill
|
Alabama
seedling
|
|
|
USDA 48-3-33
|
Brooks x
Moore
|
|
|
|
USDA 77-21-3
|
Creek x Cape
Fear
|
|
|
USDA
82-17-680
|
Wichita
open-pollinated
|
|
|
USDA
82-16-1614
|
Pawnee x
Wichita
|
|
|
USDA 88-7-11
|
Osage x
Pawnee
|
|
|
|
USDA 89-10-7
|
Wichita x
Wichita
|
|
|
|
Table 2. Incidence
of stem scab on unsprayed trees grafted in 1996 in Low Input Orchard, E. V.
Smith Research Center.
|
|
|
Stem scab lesions on worst 30.5 cm of shoot
|
|
Cultivar
|
1996
|
1997
|
1998
|
1999
|
2000
|
Average
|
|
USDA 88-7-11
|
0.0
|
cz
|
0.0
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
0.0
|
d
|
|
Barton
|
0.0
|
c
|
0.0
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
0.0
|
d
|
|
Curtis
|
0.0
|
c
|
0.0
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
0.0
|
d
|
|
Buchel 1
|
0.3
|
c
|
0.0
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
0.7
|
d
|
|
Gafford
|
8.3
|
c
|
0.0
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
1.0
|
cd
|
|
Jenkins
|
1.3
|
c
|
13.3
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
2.5
|
cd
|
|
Hughes
|
28
|
bc
|
0.0
|
b
|
0.5
|
b
|
2.0
|
c
|
0.0
|
a
|
5.2
|
cd
|
|
Syrup Mill
|
2.0
|
c
|
0.0
|
b
|
10.0
|
b
|
25
|
c
|
0.0
|
a
|
6.2
|
cd
|
|
USDA 82-17-680
|
0.0
|
c
|
0.0
|
b
|
0.0
|
b
|
40
|
c
|
0.0
|
a
|
6.7
|
cd
|
|
Gloria Grande
|
40
|
bc
|
10.0
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
8.3
|
cd
|
|
Carter
|
0.0
|
c
|
0.0
|
b
|
0.0
|
b
|
40
|
c
|
0.0
|
a
|
10.3
|
cd
|
|
Elliott (resistant
check)
|
100
|
b
|
0.0
|
b
|
0.0
|
b
|
0.0
|
c
|
0.0
|
a
|
16.7
|
c
|
|
Stuart
|
100
|
b
|
400
|
a
|
20
|
b
|
350
|
b
|
0.0
|
a
|
148
|
b
|
|
Desirable (susceptible
check)
|
300
|
a
|
450
|
a
|
533
|
a
|
533
|
a
|
13.3
|
a
|
348
|
a
|
|
zMean separation within columns by Duncan's multiple
range test (P < 0.05).
|
|
|
|
|
|
|
|
Table 3. Incidence
of leaf scab on unsprayed trees grafted in 1996 in Low Input Orchard, E. V.
Smith Research Center.
|
|
|
|
Leaf Scab (% on worst leaflet)
|
|
Cultivar
|
1996
|
1997
|
1998
|
1999
|
2000
|
Average
|
|
Barton
|
0.0
|
bz
|
0.0
|
c
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
0.0
|
d
|
|
Buchel 1
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
0.0
|
d
|
|
Elliott (resistant
check)
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
0.0
|
d
|
|
Curtis
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
1.3
|
c
|
0.0
|
b
|
0.2
|
d
|
|
Gafford
|
2.5
|
b
|
0.0
|
c
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
0.2
|
d
|
|
USDA 88-7-11
|
1.3
|
b
|
0.0
|
c
|
0.0
|
b
|
0.0
|
c
|
0.0
|
b
|
0.2
|
d
|
|
Hughes
|
0.5
|
b
|
0.0
|
c
|
0.0
|
b
|
3.0
|
c
|
0.0
|
b
|
0.6
|
d
|
|
Syrup Mill
|
1.3
|
b
|
0.0
|
c
|
0.0
|
b
|
5.0
|
c
|
0.0
|
b
|
1.0
|
d
|
|
Jenkins | |
