MISSISSIPPI SOYBEAN PROMOTION BOARD PROJECT NO (CONT) 2014 Annual Report

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1 MISSISSIPPI SOYBEAN PROMOTION BOARD PROJECT NO (CONT) 2014 Annual Report PROJECT TITLE: Evaluation of Private and Public Sobean Varieties and Breeding lines for Resistance to Stem Canker, Frogee Leaf Spot, Black Root Rot, Cercospora Leaf Blight, and Sobean Rust. PROJECT LEADER: G. L. Sciumbato, Plant Pathologist, Delta Research & Extension Center. OTHER PARTICIPANTS: W. L. Solomon, Research Associate II, Delta Research & Extension Center. EXECUTIVE SUMMARY The majorit of current sobean varieties are resistant to stem canker. However, susceptibilit to stem canker does exist (see below tables), and this should be considered when a variet or varieties are selected for planting since there are no preventive or curative fungicides to manage this disease. Over 50% of the entries in 2014 had some degree of susceptibilit to frogee leaf spot (FLS see below tables). This is important because of the large and increasing number of FLS isolates that have resistance to the strobilurin fungicides. Thus, if selected varieties are similar in all traits except FLS resistance, go with the ones that are at least moderatel resistant to this disease. It is likel that future varieties will show more resistance to the FLS pathogen since current breeding efforts should place a priorit on this. Sobean rust has not appeared in these trials. OBJECTIVES AND PROCEDURES Collect sobean samples and also receive samples of diseased sobean plants from count agents and specialists throughout the state and will identif the severit and prevalence of the diseases. Determine the virulence of stem canker isolates collected in Mississippi in Evaluate entries submitted for testing in the Mississippi Varietal Trials for resistance to stem canker, and frogee leaf spot. Stem Canker Procedure. Stem canker disease ratings of sobean entries from the 2014 Mississippi Sobean Variet Trials were made at Stoneville, MS in an inoculated trial. Sobean entries were planted in a Bosket fine sand loam soil on 6 Ma in 10-ft long single-row plots at a rate of 8 seed per foot of 40-in.-wide rows. The experimental design was a randomied complete block design with eight replications. The first 12 plants of each plot were inoculated with Diaporthe phaseolorum var. meridionalis b inserting infested toothpicks in the upper 1/3 of the stem on 18 June. Disease ratings were made on 28 Aug. Each inoculated plant in a row was rated using a rating scale of 1 = no lesion, 2 = lesion 1 in., 3 = lesion 2-3 in., 4 = lesion 5-6 in., and 5 = entire plant dead. Disease rating is reported as an average of eight replications. Data were analed using the SAS GLM procedure (version 9.3 SAS Institute, Car, NC). Frogee Leaf Spot Procedure. Frogee leaf spot disease ratings of sobean entries from the 2014 Mississippi Sobean Variet Trials were made at Stoneville, MS in an inoculated trial. Sobean cultivars were planted in a Bosket fine sand loam soil on 6 Ma in 10-ft long single-row plots at a rate of 8 seeds per foot of 40-in.-wide rows. The trial consisted of spraed and unspraed treatments. The treated trial was spraed on 19 Jun and 30 Jun with Quadris 2.08 SC at a rate of 6.0 o. per acre using a Kubota high-wheeled tractor and spraer at 20 psi with Teejet 8003VS tips set at 20-in spacings. For both the spraed and unspraed trials, the experimental design was a randomied complete block with four replications. Apr

2 Spores of Cercospora sojina were produced in the lab and spraed onto the plants using a backpack spraer on 12 Jun and 25 Jun in a concentration of 30,000 spores/l during optimum conditions of temperature and humidit to induce infection. Disease ratings were made on 29 Aug on each individual row. Disease rating scores were based on a visual rating of leaf disease using a rating scale of 0=0-1%, 1=1.1-10%, 2= %, 3= %, 4= %, 5= %, 6= %, 7= %, 8= %, and 9= %). Data were analed using the SAS GLM procedure (version 9.3 SAS Institute, Car, NC). Since there were no significant disease reductions from the Quadris applications, the spraed and unspraed test ratings were combined for a total of eight replications. RESULTS Received sobean leaf material, stem material, root material, pods, and seed from producers, cooperators in industr and lab personnel for processing and culture of suspected pathogens during the 2014 growing season. Stem canker. Two new stem canker isolates were obtained in The were not new races of the fungus. All of the entries in the 2014 Mississippi State Variet trials were evaluated for stem canker resistance using the toothpick method. The results are given in Tables 1-8. The 2014 growing season was ver favorable for sobean growth. Therefore, stem canker ma not have had time to develop in the Maturit Group III and earl IV entries. Some of these entries which were rated resistant ma be susceptible. There are still entries in the trials which are susceptible to stem canker. An entr rated above a 2.0 has the potential to have significant ield losses due to stem canker. Frogee leaf spot. All of the entries in the 2014 Mississippi State Variet trials were evaluated for frogee leaf spot. The plots were inoculated with spores of the fungus. The results for the frogee leaf spot trials are given in Tables 9-16, entries from ever maturit group were susceptible to frogee leaf spot. Even though a large number of frogee susceptible varieties are planted, losses to frogee leaf spot have been minimal in recent ears. This is because of the widespread use of foliar applied strobulurin fungicides. With the emergence of strobulurin resistant frogee cultures, the incidence of this disease is sure to increase. Conclusions. A few stem canker-susceptible entries continue to be identified each ear. Over 50% of the entries in 2014 had some degree of susceptibilit to frogee leaf spot. This is more important because of the large number of frogee isolates which have resistance to the strobulurin fungicides. Sobean rust has not appeared in these trials. There continues to be a wide range of susceptibilit to purple leaf stain in the entries in the variet trials. Apr

3 Table 1. Ratings of MG IV ( ) Roundup Read sobean cultivars for stem canker, Cultivar Disease rating Cultivar Disease rating Atlanta (Susceptible Check) 4.38 a Progen 4440 RY 1.38 bc Progen 4211 RY 3.47 a Asgrow AG bc Armor 44-R b Armor AX bc Progen 4510 RYS 1.84 bc Mcogen 5N452 R bc Armor 43-R bc Armor AX 4440 Croplan bc Steer 4393 R2 Delta Grow DG 543RY bc Mcogen 5N451R2 Armor AX bc USG 74F53R Asgrow AG bc Asgrow AG 4534 Morso 44x bc Pioneer 45T11 RR Asgrow AG bc NK S45-V8 Dna-Gro 31RY bc LSD (P=0.05) Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

4 Table 2. Disease ratings of MG IV ( ) Roundup Read sobean cultivars for stem canker, Cultivar Disease rating Cultivar Disease rating Atlanta (Susceptible Check) 3.77 a Hornbeck HBK RY e Progen 4747 RY 3.02 b Univ. Missouri S e Hornbeck HBK RY b REV 47R e Dna-Gro 37RY c REV 47R e Asrrow AG d Armor 47-R e USG 74B83 R 1.00 e Univ. Missouri S e USG 74B94 RS 1.00 e Univ. Missouri S 47-K e Progen 47T36 R 1.00 e MPG 4714N RR 1.00 e Progen 4613 RYS 1.00 e Armor AX e Dna-Gro S46RY e Armor 46-R e Pioneer 47T89 R 1.00 e Croplan R2C e Morso 47x e Delta Grow DG e Dna-Gro S47RY e Armor AX e Great Heart Seed GT476C R e Delta Grow DG e Dna-Gro SX 1484 RS 1.00 e Delta Grow DG 4670 RR e REV 46R e Delta Grow DG 4685 RR e Mcogen 5N478 R e Delta Grow DG 4775 RR 1.00 e Progen 4788 RY 1.00 e Morso 46x e Armor AX e LSD (P=0.05) Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

5 Table 3. Disease ratings of MG IV ( ) Roundup Read sobean cultivars for stem canker, Cultivar Disease rating Cultivar Disease rating Atlanta (Susceptible Check) 4.09 a Pioneer 49T80 Delta Grow DG 4925 RR b Mcogen MXCX NR2 Go So bc Delta Grow DG 4970 RR Delta Grow DG 4985 RR2 REV 49A55 Pioneer 94Y70 Armor 49-R56 Pioneer 94Y90 Progen 4848 RYS Morso 48x02 Univ. Missouri MPV 483C Pioneer 48T97 R REV 542A94 Mcogen SN 479 R2 Armor AX 4480 Dna Gro S 48RS53 Armor AX 4490 Asgrow AG 4934 Croplan 4873 S Progen 4850 RYS REV 49A75 Armor 48-R66 Delta Grow DG 4940 Dna-Gro S 49RY25 Delta Grow DG 4825 RR2 Progen 4900 RY Delta Grow DG 4880 RR REV 48R22 Asgrow AG 4835 REV 48R44 Morso 49x54 REV 49R94 Delta Grow DG 4930 RR2 LSD (P=0.05) Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

6 Table 4. Disease ratings of MG V ( ) Roundup Read sobean cultivars for stem canker, Cultivar Disease rating Cultivar Disease rating Atlanta (Susceptible Check) 3.90 a Pioneer 52T b Pioneer 50T64 R 1.00 b Mcogen MYCX 5422 NR b Great Heart Seed GT 516 CR b Armor 53-R b Morso 53x b Asgrow AG b Morso 51x b NK S51-C b Armor AX b REV 52R b Armor 50-R b NK S52-Y b Dna-Gro S 52RY b Go So b Armor AX b Croplan 5081 RR b Hornbeck HBK RY b Armor 51-R b Asgrow AG b Steer b Progen 5213 RY 1.00 b Asgrow AG b Progen 5333 RY 1.00 b Delta Grow DG 5230 RR b REV 51-R b MPG 5214 NRR 1.00 b REV 54-R b MPG 5314 NRR 1.00 b Pioneer 53T735 R 1.00 b Great Heart Seed GT-500C R b Pioneer 52T50 R 1.00 b Univ. Arkansas RO RY 1.00 b LSD (P=0.05) Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Table 5. Disease ratings of MG V ( ) Roundup Read sobean cultivars for stem canker, Cultivar Disease rating Cultivar Disease rating Atlanta (Susceptible Check) 4.65 a Hornbeck HBK RY 5421 Delta Grow DG b Delta Grow DG 5475 REV 55R53 Mcogen 5N540 R2 Morso 56x02 Asgrow AG 5535 Mcogen 5N550 R2 Asgrow AG 5575 RR2 Progen 5555 Univ. Arkansas RO RR Dna-Gro 32RY55 Univ. Arkansas RO RR Asgrow AG 5533 Pioneer 54T94 R Dna-Gro S 54RY43 Morso 54x41 LSD (P=0.05) Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

7 Table 6. Disease ratings of MG V ( ) Roundup Read sobean cultivars for stem canker, Cultivar Disease rating Atlanta (Susceptible Check) 4.69 a REV 57R b Asgrow AG b Univ. Arkansas RO RR 1.13 c Asgrow AG 5831 Dna-Gro S56RY84 Pioneer 95Y70 Pioneer 95Y10 Univ. Arkansas R RY Mcogen 39RY57 REV 56R63 Progen 5610 RY LSD (P=0.05) 0.50 Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Table 7. Disease ratings of MG IV ( ) conventional sobean cultivars for stem canker, Cultivar Disease rating Cultivar Disease rating J (Susceptible Check) 3.00 a USG 74G74 LL 1.00 b Univ. Missouri S b Halo 4:76 LL 1.00 b Progen 4560 LL 1.00 b Halo X 449 LL 1.00 b Progen 4620 LLS 1.00 b Halo 4: b Hornbeck HBK LL b Delta Grow DG 4990 LL 1.00 b Ellis 1.00 b Dna Gro S49L b Progen 4819 LL 1.00 b Halo 4: b Hornbeck HBK LL b Hornbeck HBK-BX4748 LL 1.00 b Progen 4930 LL 1.00 b Halo X 4404 LL 1.00 b Progen 4928 LL 1.00 b Delta Grow DG 4767 LL 1.00 b Delta Grow DG 4967 LL 1.00 b Univ. Arkansas RO b Hornbeck HBK LL b Univ. Arkansas RO b Dna-Gro S49LL b Univ. Arkansas RO b Hornbeck HBK LL b Halo 448 LL 1.00 b Halo 4:94 LL 1.00 b Univ. Missouri SO b Halo 4:97 LL 1.00 b USG 74G74 LS 1.00 b LSD (P=0.05) 0.38 Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

8 Table 8. Disease ratings of MG V ( ) conventional sobean cultivars for stem canker, Cultivar Disease rating Cultivar Disease rating J (Susceptible Check) 4.33 a Halo 5:26 LL 1.00 d Univ. Missouri S b Halo X d Leland 1.94 c Halo 5: d Univ. Arkansas RO cd Halo X d Halo 5:25 LL 1.25 d REV 55L d Univ. Arkansas 5213C 1.00 d Delta Grow DG 5461 LL 1.00 d Progen 5220LLS 1.00 d USDA-ARS JTN d Delta Grow DG5267 LL 1.00 d Oark 1.00 d Progen 5960 LL 1.00 d Univ. Arkansas d Halo 5:01 LL 1.00 d Osage 1.00 d Delta Grow DG4367 LL 1.00 d Univ. Arkansas RO d Progen 5160 LL 1.00 d Progen 5469 LL 1.00 d LSD (P=0.05) Disease rating scores were based on a visual rating using of 1 = resistant, 2 = moderatel resistant, 3 = moderatel susceptible, 4 = susceptible, and 5 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Table 9. Disease ratings of MG IV ( ) sobean cultivars for frogee leaf spot, Cultivar Disease rating Cultivar Disease rating Armor DK 4744 (Susceptible Check) 8.75 a Morso 44x g-k Progen 4510 RYS 7.13 b Progen 4211 RY 3.38 h-l Armor AX bc Asgrow AG i-m Asgrow AG bcd USG 74F53 R 2.50 j-n Armor 43-R bcd Mcogen 5N452 R j-n NK S45-V cde Croplan k-n Asgrow AG def Armor 44-R lmn Steer 4393 R d-g Mcogen 5N451 R mn Progen 4440 RY 4.25 e-h Dna-Gro 31RY mn Armor AX e-h Asgrow AG mn Armor AX f-i Pioneer 45T11 RR 1.38 n Delta Grow DG 543RY f-j - - LSD (P=0.05) following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

9 Table 10. Disease ratings of late MG IV ( ) sobean cultivars for frogee leaf spot, Cultivar Disease rating Cultivar Disease rating Armor DK 4744 Susceptible (Check) 8.25 a Croplan R2C g-l USG 74B94 RS 7.75 ab Armor AX g-l Dna-Gro S46RY abc Univ. Missouri S g-l Delta Grow DG 4685 RR abc Morso 47x g-m Dna-Gro SX 1484 RS 6.88 abc Armor 47-R h-n Univ. Missouri S a-d Progen 4747 RY 3.75 h-n MPG 4714 N RR 6.75 a-d Hornbeck HBK RY i-n Armor AX a-e Armor 46-R i-n USG 74B83 R 6.63 a-e REV 47R j-n Dna-Gro 37RY b-f Progen 4613 RY j-n Great Heart Seed GT 476C R c-g Mcogen 5N478 R k-n Morso 46x c-g Asgrow AG k-n REV 46R d-h Delta Grow DG 4670 RR lmn Delta Grow DG 4775 RR 5.00 e-i Progen 4788 RY 2.88 lmn Dna-Gro S 47RY f-j Pioneer 47T36 R 2.75 mn Hornbeck HBK RY f-k REV 47R mn Armor AX f-k Pioneer 47T89 R 2.50 mn Delta Grow DG f-k Univ. Missouri S 47-K n Delta Grow DG f-k LSD (P=0.05) following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

10 Table 11. Disease ratings of late MG IV ( ) sobean cultivars for frogee leaf spot, Cultivar Disease rating Cultivar Disease rating Armor DK 4744 (Susceptible Check) 8.38 a Delta Grow DG f-j Delta Grow DG 4930 RR ab Morso 49x f-j Progen 4848 RYS 6.88 b Morso 48x f-k Asgrow AG b Progen 4850 RYS 3.50 f-l Armor AX b Pioneer 49T f-l Delta Grow DG bc Dna-Gro S 48RS g-k Croplan 4873 S 6.13 bc Asgrow AG g-k Armor 48-R bcd Progen 4900 RY 2.88 i-m Delta Grow DG b-e REV 48R i-m Armor AX c-f REV 49R i-m Armor 49-R def REV 48R j-m Mcogen SN 479 R ef Delta Grow DG j-m Mcogen MXCX 54490N R fg REV 49A klm Pioneer 94Y fgh Pioneer 48T97 R 2.25 klm Dna-Gro S 49RY fgh Delta Grow DG lm REV 49A fgh REV 542A m Delta Grow DG f-i Univ. Missouri MPV 483C 1.75 m Pioneer 94Y f-j Go So m LSD (P=0.05) following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

11 Table 12. Disease ratings of earl MG V ( ) sobean cultivars for frogee leaf spot, Cultivar Disease rating Cultivar Disease rating Armor DK 4744 (Susceptible Check) 8.13 a Pioneer 50T64 R 3.25 g-l MPG 5314 NRR 6.38 b Armor 50-R g-l Great Heart Seed GT-500C R b Univ. Arkansas RO RY 2.88 h-m REV 51-R b Morso 53x h-m Asgrow AG bc REV 52R i-m NK S 52-Y bcd Morso 51x i-m Armor 53-R cde Pioneer 52T j-n Asgrow AG cde Croplan 5081 RR k-o Asgrow AG c-f Delta Grow DG 5230 RR k-o Armor AX c-f Mcogen MYCX 5422 NR k-o NK S 51-C d-g Pioneer 53T735 R 2.25 k-o Great Heart Seed GT 516C R e-h Armor AX k-o Pioneer 52T50 R 4.00 e-h Dna-Gro S 52RY l-o Progen 5213 RY 3.88 e-i Steer mno Progen 5333 RY 3.88 e-i Hornbeck HBK RY mno MPG 5214 NRR 3.75 e-j Go So no REV 54R f-j Armor 51-R o LSD (P=0.05) following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Table 13. Disease ratings of earl MG V ( ) sobean cultivars for frogee leaf spot, Cultivar Disease rating Cultivar Disease rating Armor DK 4744 (Susceptible Check) 7.63 a Delta Grow DG d-h Pioneer 54T94 R 4.88 b Mcogen SN550 R e-i Mcogen SN540 R bc Hornbeck HBK RY f-j REV 55R bcd Progen g-j Dna-Gro S 54RY bcd Univ. Arkansas RO RR 2.25 hij Univ. Arkansas RO RR 3.88 b-e Asgrow AG 5575 RR ij Morso 56x cde Morso 54x ij Asgrow AG def Dna-Gro 32R j Delta Grow DG d-g Asgrow AG j LSD (P=0.05) following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

12 Table 14. Disease ratings of late MG V ( ) sobean cultivars for frogee leaf spot, Cultivar Disease rating Armor DK 4744 (Susceptible Check) 7.13 a Mcogen 39RY b Asgrow AG bc Univ. Arkansas R RY 2.88 cd Asgrow AG cde Dna-Gro S56RY cde Pioneer 95Y def Univ. of Arkansas RO RR 2.00 def Pioneer 95Y def Progen 5610 RY 2.00def REV 56R ef REV 57R f LSD (P=0.05) 0.88 following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

13 Table 15. Field evaluation of MG IV ( ) conventional sobean cultivars for frogee leaf spot, Cultivar Disease rating Cultivar Disease rating Armor DK 4744 (Susceptible Check) 8.25 a Hornbeck HBK-BX4748 LL 1.75 i-l Univ. Missouri SO ab Halo X4404 LL 1.63 i-l Halo 4: bc Progen 4560 LL 1.63 i-l Univ. Arkansas RO bcd Halo 4:76 LL 1.63 i-l Univ. Arkansas RO bcd Hornbeck HBK LL i-l Progen 4819 LL 5.88 bcd Dna-Gro S49LL jkl Hornbeck HBK LL cde Dna-Gro S49L jkl Delta Grow DG 4767 LL 4.50 c-f Univ. Missouri S jkl Halo 4:97 LL 4.38 def Hornbeck HBK LL jkl USG 74G74 LS 3.75 efg Progen 4830 LL 1.00 jkl Progen 4620 LLS 3.50 fgh Halo 4:94 LL 1.00 jkl Halo 448 LL 3.00 f-i Ellis 1.00 jkl Univ. Arkansas RO g-j Progen 4928 LL 0.88 jkl Halo X 449 LL 2.13 h-k Delta Grow DG 4990 LL 0.75 kl Hornbeck HBK LL i-l Delta Grow DG 4976 LL 0.50 l Halo 4: i-l - - LSD (P=0.05) following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Table 16. Field evaluation of MG V ( ) conventional sobean cultivars for frogee leaf spot, Cultivar Disease rating Cultivar Disease rating Armor DK 4744 (Susceptible Check) 8.13 a Halo 5:01 LL 3.13 b-h Delta Grow DG 4367LL 4.38 b Halo 5:26 LL 3.13 b-h Univ. Arkansas 5213C 4.25 bc Progen 5960 LL 3.00 b-h Univ. Arkansas bcd Univ. Missouri S b-h Oark 3.88 b-e Halo 5: c-h Univ. Arkansas RO b-e Progen 5469 LL 2.75 d-i USDA-ARS JTN b-e Delta Grow DG 5267 LL 2.63 e-i Progen 5220 LLS 3.63 b-f Halo 5:25 LL 2.38 f-i Delta Grow DG 5461 LL 3.25 b-g Osage 2.25 f-i Leland 3.25 b-g Halo X ghi Univ. Arkansas RO b-g Progen 5160 LL 1.75 hi Halo X b-h REV 55L i LSD (P=0.05) following resistance levels: 0-1 = resistant, 2-3 = moderatel resistant, 4-5 = moderatel susceptible, 6-7 = susceptible, and 8-9 = ver susceptible. Means within a column followed b the same letter are not significantl different (P=0.05) as determined b least significant difference (LSD) test. Apr

14 Publications W.L. Solomon and G.L. Sciumbato Field evaluation of group IV ( ) conventional sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) W.L. Solomon and G.L. Sciumbato Field evaluation of group IV ( ) sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) W.L. Solomon and G.L. Sciumbato Field evaluation of late maturit group IV ( ) sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) W.L. Solomon and G.L. Sciumbato Field evaluation of late maturit group IV ( ) sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) G.L. Sciumbato and W.L. Solomon Field evaluation of group V ( ) conventional sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) W.L. Solomon and G.L. Sciumbato Field evaluation of earl maturit group V ( ) sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) W.L. Solomon and G.L. Sciumbato Field evaluation of earl maturit group V ( ) sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) G.L. Sciumbato and W.L. Solomon Field evaluation of late maturit group V ( ) sobean cultivars to frogee leaf spot, Plant Disease Management Reports 9. (Accepted) G.L. Sciumbato and W.L. Solomon Disease ratings of group IV ( ) conventional sobean to stem W.L. Solomon and G.L. Sciumbato Disease ratings of group IV ( ) Roundup Read sobean to stem G.L. Sciumbato and W.L. Solomon Disease ratings of group IV ( ) Roundup Read sobean to stem W.L. Solomon and G.L. Sciumbato Disease ratings of group IV ( ) Roundup Read sobean to stem G.L. Sciumbato and W.L. Solomon Disease ratings of group V ( ) conventional sobean to stem W.L. Solomon and G.L. Sciumbato Disease ratings of group V ( ) Roundup Read sobean to stem W.L. Solomon and G.L. Sciumbato Disease ratings of group V ( ) Roundup Read sobean to stem G.L. Sciumbato and W.L. Solomon Disease ratings of group V ( ) Roundup Read sobean to stem Apr