West Coast Nut September 2019

Continued from Page 17
begins approximately three days before
Nonpareil full bloom in the different
Sacramento and San Joaquin Valley
growing regions, with full bloom for
Kester occurring approximately six
days after Nonpareil. Petal-fall typically
occurs a week after Nonpareil petal-fall,
providing good late-bloom overlap.
Bloom period, including start of
bloom, full bloom and petal-fall in
the different growing regions was very
similar to that of the Butte variety. Like
Nonpareil and Butte, Kester is self-sterile
but cross-compatible with Nonpareil,
Butte, and most major Nonpareil
pollenizers. Harvest occurs just after
Figure 1. Appearance of in-shell nuts and kernels of Kester compared to Nonpareil.
Cultivar Nuts/tree Kernel Kernel/
Cultivar Nuts/tree mass (g) Kernel
nut ratio
mass (g)
Nonpareil
Kester
Winters
Sweetheart
Marcona
Chips
Kahl
Kochi
8855 a
Nonpareil 7617ab
Kester8679 a
Winters 8653 a
Sweetheart 6449 b
Marcona 9008 a
Chips8830 a
Kahl 2025 c
Kochi
1.18 b
8855 1.19 ab
7617ab 1.01 c
8679 1.10 ac
8653
1.22
a
b
6449 0.92 bd
9008 1.05 ac
8830 1.41 a
2025 c
0.70 a
1.180.69 b a
1.190.62 b ab
1.010.60 c ab
1.100.28 c d
1.220.65 b ab
0.920.55 d bc
1.050.51 c c
1.41 a
Kernel
Kernel/ lbs./tree
nut ratio
22.5 a
0.70 20.1 a b
0.69 19.3 a b
0.62 21.0 ab
0.60 17.4 abc
0.28 18.2 d bc
0.65 20.4 ab b
0.55 6.3 bcd
0.51 c
Kernel
Kernel
lbs./acre
lbs./tree
2718 a
22.5 2432 a b
20.1 2338 b b
19.3 2538 b b
21.0 2104 ab c
17.4 2201 c bc
18.2 2465b bc
20.4 763 b d
6.3 d
Cumulative
(2006-12) kernel
Kernel Cumulative
yield (lbs./acre)
lbs./acre (2006-12) kernel
yield (lbs./acre)
20910 a
271820270 a a 20910 a
243217095 b b 20270 a
2338
16456
b
b 17095 b
253813351 b c 16456 b
210416416 c b 13351 c
220115979 bc b 16416 b
2465b12816 c 15979 b
763 d
12816 c
Table 1. Averaged 2010-2012 mature-tree production data for Kester compared to Nonpareil and pollenizer cultivars in the planting in Kern County. Cumulative
(2006-12) kernel yield presented in last column. (Scores within columns followed different letters are statistically different using a Duncan’s multiple range test with
P equals 0.05.)
”
Alternaria Hull Rot Scab
BLOOM PERIOD, INCLUDING
18
Nonpareil
Kester
Kochi
Chips
Marcona
Sweetheart
Kahl
Winters
0.1 a
Nonpareil 0.5 bc
0.3 ab
0.5 bc
0.8 cd
Kester
Kochi
Chips
Marcona
1 de
Sweetheart 1.3 e
Kahl 3.0 f
Winters
West Coast Nut September 2019
Alternaria
6 b
Hull Rot
0 a
Scab
0.12 aa
60 ba
0 a
0.525 bcc
20.2 a a 0 a
0.33 ab a 25 0 ac
0.2 a
0.50 bc a 30 a 0 a
0.81 cd a
0 a 0 a
1 0 dea
10 a 0 a
1.32 ae
02.2 a b 0 a
3.0 f 2 a 2.2 b
Table 2. Scab and Alternaria leafspot rating, and hull rot strikes per tree following
unusually high disease pressures in 2012 at the Kern County plot. (Scores within
columns followed different letters are statistically different using a Duncan’s
multiple range test with P equals 0.05.)
START OF BLOOM, FULL BLOOM
AND PETAL-FALL IN THE
DIFFERENT GROWING REGIONS
WAS VERY SIMILAR TO THAT OF
THE BUTTE VARIETY.
“