R. Jay Goos and Brian Johnson, Department of Soil Science, NDSU, Fargo, ND 58105
e-mail: rj.goos@ndsu.nodak.edu
Field studies were conducted at four locations in 2002, to compare the chlorosis resistance of 182 soybean varieties to iron chlorosis. The four sites were located near Argusville, Ayr, Galesburg, and Leonard, ND. The sites ranged in pH from 8.1 to 8.5, salinity (EC) from 0.2 to 0.5 mmho/cm. Thirty seeds were planted in short (5Õ) rows on 30-inch centers. The experimental design was a randomized complete block with four replications.
Three ratings were made, at the 2-3 trifoliolate stage, the 5-6 trifoliolate stage, and two weeks after the 5-6 trifoliolate stage. The scale was a 1-5 scale, with 1=representing no chlorosis and 5= the most severe chlorosis. The third rating was not taken at the Ayr site, due to Roundup drift damage from the surrounding field on the non-transgenic varieties, and at the Leonard site, because of field variability after the 5-6 trifoliolate stage.
Eight ÒstandardÓ varieties were also entered, to help in the interpretation of the results. The varieties, listed in expected order from the most resistant to most susceptible, were Iowa State ISU A11> KG-20 > Traill > Council > Barnes = Glacier > Mycogen 5072 > Stine 0480. The variety ISU A11 represents the highest level of chlorosis resistance available in current breeding lines. The standards, except for Barnes, were included twice, to help us determine the reproducibility of the ratings.
The summary of the chlorosis scores, averaged across site and the three ratings, are shown in Table 1. We were very pleased with how well the trials went in 2002. Our ÒstandardÓ varieties separated themselves as we expected, with good reproducibility. Each chlorosis rating in Table 1 represents the average of 40 observations.
From our experience with chlorosis in the field, we generally recommend that varieties have a chlorosis resistance as good or better than Council for chlorosis-prone soils. On fields with severe chlorosis problems, only varieties with the highest levels of resistance should be planted. Any yield advantage of a less-resistant variety is lost if the crop turns yellow, even if there is recovery later in the growing season.
Please contact us by mail or e-mail if you want more
information. By mid-September, a
more complete report of our 2002 chlorosis studies, with detailed soil analyses
and chlorosis scores by site will be available at the
following web address:
www.soilsci.ndsu.nodak.edu/yellowsoybeans/
This research was sponsored by the North Dakota Soybean Council.
Table 1. Average chlorosis scores at four sites in North Dakota, 2002. 1=no chlorosis, 5=most severe chlorosis.
|
Company |
Variety name |
Average |
|
Standards |
ISU A11 |
1.3 |
|
Standards |
ISU A11 |
1.4 |
|
U. of MN |
MN0302 |
1.7 |
|
Seeds 2000 |
2070 RR |
1.8 |
|
Hyland |
RR Rally |
1.9 |
|
Golden Harvest |
X 0878 |
2.0 |
|
Standards |
KG-20 |
2.0 |
|
Legend |
0709 RR |
2.0 |
|
Kaystar |
K-0760RR |
2.0 |
|
U. of MN |
MN0201 |
2.0 |
|
Standards |
KG-20 |
2.1 |
|
Mycogen |
X52021 |
2.1 |
|
Pioneer |
Exp 14 |
2.1 |
|
Brushvale |
BS 2108 |
2.1 |
|
UAP |
Dynagro 3074 RR |
2.1 |
|
Mycogen |
5007 |
2.1 |
|
Bio-Gene |
050 RR |
2.1 |
|
Peterson Farm Seed |
Thor |
2.1 |
|
Standards |
Traill |
2.2 |
|
Gold Country |
GCS 3205 RR |
2.2 |
|
Hyland |
RR Regal |
2.2 |
|
Garst |
0601 RR |
2.2 |
|
Legend |
0601 RR |
2.2 |
|
Standards |
Traill |
2.2 |
|
NuTech |
NT-0888 RR |
2.2 |
|
Hyland |
HX 271 |
2.2 |
|
NuTech |
NT-0333 RR |
2.2 |
|
Stine |
S0236-4 |
2.2 |
|
Mycogen |
Atlas 5B140RR |
2.3 |
|
Mustang |
M-023 RR |
2.3 |
|
Golden Harvest |
X 0724 RR |
2.3 |
|
Seeds 2000 |
X0071 RR |
2.3 |
|
Pioneer |
90B51 |
2.3 |
|
Prairie Brand |
PB-0799 RR |
2.3 |
|
Peterson Farm Seed |
0009 RR |
2.3 |
|
Mycogen |
Atlas 5B031RR |
2.3 |
|
Mallard |
RR X0513 |
2.3 |
|
Dairyland Seed |
DSR-007/RR |
2.3 |
|
Gold Country |
GCS 1300 RR |
2.3 |
|
Prairie Brand |
PB-0232 RR |
2.3 |
|
Wensman |
W 2054RR |
2.3 |
|
Peterson Farm Seed |
0402 RR |
2.3 |
|
Brushvale |
BS 2117 |
2.3 |
|
Standards |
Council |
2.3 |
|
NuTech |
NT-0099 RR |
2.3 |
|
Mallard |
RR 0912 |
2.3 |
|
Syngenta |
X061 |
2.3 |
|
Garst |
1304 RR |
2.4 |
|
Syngenta |
X062 |
2.4 |
|
Stine |
S0093-4 |
2.4 |
|
Prairie Brand |
PB-0094 RR |
2.4 |
|
Gold Country |
GCS 2314 RR |
2.4 |
|
Peterson Farm Seed |
0302 EX |
2.4 |
|
Ziller |
BT 7072R |
2.4 |
|
Syngenta |
NK Brand S10-F2 |
2.4 |
|
SDSU |
SD1081RR |
2.4 |
|
Asgrow |
AG 0801 |
2.4 |
|
Standards |
Council |
2.4 |
|
Garst |
0601 RR |
2.4 |
|
UAP |
Dynagro 3094 RR |
2.4 |
|
Proseed |
RR 20-80 |
2.4 |
|
Wensman |
W 2081RR |
2.4 |
|
Pioneer |
Exp 16 |
2.5 |
|
Proseed |
RR 1080 |
2.5 |
|
NuTech |
NT-0090 RR |
2.5 |
|
Dekalb |
DKB 005-51 |
2.5 |
|
Prograin |
PR 134.05 |
2.5 |
|
Peterson Farm Seed |
0309 EX |
2.5 |
|
NDSU |
Walsh |
2.5 |
|
Gold Country |
GCS 933 RR |
2.5 |
|
Pioneer |
Exp 15 |
2.5 |
|
Prairie Brand |
PB-0932 RR |
2.5 |
|
Gold Country |
GCS 2309 RR |
2.5 |
|
Kaystar |
K-0960RR |
2.5 |
|
Northstar |
NS 0018RR |
2.5 |
|
Ziller |
BT 7090R |
2.6 |
|
Garst |
XR 09401 |
2.6 |
|
Top Farm |
6102 RR |
2.6 |
|
Pioneer |
90B74 |
2.6 |
|
Ziller |
Exp. 20240R |
2.6 |
|
U. of MN |
MN0304 |
2.6 |
|
Syngenta |
NK Brand S06-L6 |
2.6 |
|
Proseed |
RR 20-90 |
2.6 |
|
Wensman |
W 2093 |
2.6 |
|
Excel Brand |
8030RR |
2.6 |
|
Hyland |
RR Raven |
2.6 |
|
Dekalb |
DKB 09-52 |
2.6 |
|
Seeds 2000 |
0051 RR |
2.6 |
|
Sabre |
090 RR |
2.6 |
|
Dairyland Seed |
DSR-009/RR |
2.6 |
|
Kaystar |
K-1200RR |
2.6 |
|
Mustang |
M-092 RR |
2.6 |
|
Dairyland Seed |
DSR-075/RR |
2.6 |
|
Peterson Farm Seed |
PFS 0202 RR |
2.6 |
|
Hyland |
RR Randell |
2.6 |
|
Hyland |
HX 261 |
2.6 |
|
NDSU |
ND 98-2252 |
2.6 |
|
Hyland |
RR Ramsey |
2.6 |
|
Northstar |
NS 0037RR |
2.6 |
|
Garst |
0211 RR |
2.6 |
|
Thunder |
2303 RR |
2.7 |
|
Standards |
Glacier |
2.7 |
|
Stine |
S0846-4 |
2.7 |
|
Seeds 2000 |
2110 RR |
2.7 |
|
Mustang |
M-033 RR |
2.7 |
|
Mallard |
RR X0211 |
2.7 |
|
Northstar |
NS 0206RR |
2.7 |
|
NuTech |
NT-0777 RR |
2.7 |
|
Peterson Farm Seed |
PFS 03005 RR |
2.7 |
|
Ziller |
Exp. 41309R |
2.7 |
|
Hyland |
HX 272 |
2.7 |
|
Mycogen |
Atlas 5B020RR |
2.7 |
|
Syngenta |
CL 820230 |
2.7 |
|
Thunder |
2308 RR |
2.7 |
|
Brushvale |
BS 2103 |
2.7 |
|
Pioneer |
Exp 13 |
2.7 |
|
Mycogen |
Atlas 5B101RR |
2.7 |
|
Mycogen |
Atlas 5B051RR |
2.7 |
|
Hyland |
HX 270 |
2.7 |
|
Thunder |
608 RR |
2.8 |
|
U. of MN |
MN0071 |
2.8 |
|
U. of MN |
MN1005 |
2.8 |
|
Wensman |
W 2033RR |
2.8 |
|
Peterson Farm Seed |
PFS 03008 RR |
2.8 |
|
SDSU |
SD1091RR |
2.8 |
|
Thunder |
23007 RR |
2.8 |
|
UAP |
Dynagro 3010 RR |
2.8 |
|
Top Farm |
E 6002 RR |
2.8 |
|
Prairie Brand |
PB-0852 RR |
2.8 |
|
Peterson Farm Seed |
PFS 0308 EX |
2.8 |
|
NDSU |
Surge |
2.8 |
|
Syngenta |
CL 725736 |
2.9 |
|
Wensman |
W 2077RR |
2.9 |
|
Standards |
Barnes |
2.9 |
|
Hyland |
HX 264 |
2.9 |
|
Standards |
Glacier |
3.0 |
|
U. of MN |
MN0091 |
3.0 |
|
Peterson Farm Seed |
0305 EX |
3.0 |
|
Prairie Brand |
PB-0081 RR |
3.0 |
|
Dairyland Seed |
DST-0811/RR |
3.0 |
|
Mustang |
M-053 RR |
3.0 |
|
Pioneer |
Exp 12 |
3.1 |
|
UAP |
Dynagro 3009 RR |
3.1 |
|
Hyland |
HX 267 |
3.1 |
|
Kaystar |
K-0505RR |
3.1 |
|
NDSU |
Barnes |
3.1 |
|
Mallard |
RR 1011 |
3.1 |
|
Thunder |
2304 RR |
3.1 |
|
Stine |
S0096-4 |
3.1 |
|
Peterson Farm Seed |
PFS 0302 AEX |
3.1 |
|
Prairie Brand |
PB-0452 RR |
3.2 |
|
Garst |
XR 12C94 |
3.2 |
|
Bio-Gene |
020 RR |
3.2 |
|
Brushvale |
BS 8920 |
3.2 |
|
Syngenta |
CL 600570 |
3.2 |
|
Dairyland Seed |
DSR-040/RR |
3.2 |
|
Legend |
0401 RR |
3.2 |
|
Mallard |
Experimental |
3.2 |
|
Top Farm |
6052 RR |
3.2 |
|
Asgrow |
AG 0201 |
3.2 |
|
Golden Harvest |
H-1091RR |
3.2 |
|
Prograin |
PR 061.11 |
3.2 |
|
Mycogen |
Atlas 5B009RR |
3.3 |
|
Bio-Gene |
030 RR |
3.3 |
|
Hyland |
RR Ranger |
3.3 |
|
Brushvale |
BS 135-10 |
3.3 |
|
Syngenta |
CL 722304 |
3.3 |
|
Golden Harvest |
H-0440 |
3.3 |
|
UAP |
Dynagro 3053 RR |
3.3 |
|
Golden Harvest |
H-0544RR |
3.4 |
|
Asgrow |
AG 0501 |
3.4 |
|
Peterson Farm Seed |
04003 EX |
3.4 |
|
Top Farm |
6042 RR |
3.4 |
|
NDSU |
ND 98-1185 |
3.4 |
|
Standards |
Mycogen 5072 |
3.5 |
|
NuTech |
NT-0555 RR |
3.5 |
|
NDSU |
Sargent |
3.5 |
|
NDSU |
ND 95-931 RR |
3.5 |
|
Agri-Tel |
Viper |
3.5 |
|
Prograin |
PR 225.01 |
3.5 |
|
Standards |
Stine 0480 |
3.6 |
|
Standards |
Mycogen 5072 |