Production Research Update
David KeeDirector of Research, MSR&PC
1/6-10/20 Small Grains Update
MSR&PC FY19 Production Projects
• MN soybean funded 25 production projects in FY19• 18 PI’s, 37 Co-PI’s
• Trained multiple Post-Docs, graduate and undergraduate students• Entities include UMN, NDSU and MN Wheat OFR team• Action Team liaised with multiple state and regional entities• Updates today
• Bio-pesticide development• Palmer amaranth update• Soybean Gall Midge• Unified Fungicide trial
• Frogeye leaf spot update• Waterhemp control
Bio-pesticides and Seed Treatments for Control of
SCN and SDS
• Aim 1: Identify biologically derived nematicides and anti-fungal compounds
• Aim2 : Test combinations of high-performing biological agents against SCN and SDS
• Aim3: Test seed coating treatments and amended spore formulations:
Kathryn Bushley
SenyuChen
Christine Salomon
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75 to 100 50 to 74 25 to 49
Num
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ates
% Nematode Toxicityi) Bioactivity guided fractionation
ii) Identification of active compound(s)
Greenhouse pot trials
Optimize seed treatments formulations
Aim 1: Identify biologically derived nematicides and anti-fungal compounds
SDS treatment alone SDS + 407B13.1 seed treatmentNo SDS control
Aim 2: Greenhouse trials of endophyte seed treatments against SDS
-20-10
0102030405060708090
H A I E D MediacontrolPe
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Fungal Strains
SupernatantAqueous phaseOrganic Phase
min10 20 30 40 50
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DAD1 B, Sig=220,16 Ref=360,100 (C:\CHEM32\...UDI\CHRISTINE_ILYONECTRIA_KB 2019-08-09 12-19-22\E_216_25.D)
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DAD1 B, Sig=220,16 Ref=360,100 (C:\CHEM32\...UDI\CHRISTINE_ILYONECTRIA_KB 2019-08-09 12-19-22\E_413_17.D)
min10 20 30 40 50
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DAD1 B, Sig=220,16 Ref=360,100 (C:\CHEM32\...HRISTINE_ILYONECTRIA_KB 2019-08-09 12-19-22\SM_14_15_11_1.D)
Novel compound
Activity guided fractionation HPLC and identification of novel compounds
Palmer Amaranth Status December 2019Anthony Cortilet, MDA
County First Detected Sites Acres Infested Site Type 2019 Population Status
Douglas 2017 7 73 Conservation Land Not Present Due to Treatments
Houston 2019 2 1 Ag Field Present – Treated in 2019
Lincoln 2019 1 24 Ag Field Present – Treated in 2019
Lyon 2016 6 42 Conservation Land Not Present Due to Treatments
Jackson 2018 1 23 Ag Field Not Present Due to Treatments
Redwood 2018 1 4.5 Ag Field Not Present Due to Treatments
Todd 2017 6 133 Conservation Land Not Present Due to Treatments
Yellow Medicine 2016 29 153 Conservation Land Not Present Due to Treatments
Counties where Palmer amaranth was confirmed growing in MN
Palmer Amaranth Status December 2019
In addition to sites where Palmer was documented growing in MN, several counties had seed mixes that tested positive for containing Palmer amaranth seed. MDA was able to locate where all of the seed was planted and fortunately, no Palmer amaranth has EVER been detected growing in those plantings.
County Seed Mix Type Result
Dodge Conservation Detected in Seed - Not Found in Field Planting
Hennepin Conservation Detected in Seed - Not Found in Field PlantingMarshall Conservation Detected in Seed - Not Found in Field PlantingPennington Conservation Detected in Seed - Not Found in Field PlantingRed Lake Conservation Detected in Seed - Not Found in Field PlantingRoseau Conservation Detected in Seed - Not Found in Field Planting
MDA Palmer Amaranth Status Map
Click on a county to view current status and other information
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© 2019 Regents of the University of Minnesota. All rights reserved.
88Bruce Potter 2019
Soybean Gall Midge Update
Bruce Potter, IPM educator, Lamberton
Soybean Gall Midge Resseliella maxima
(University of Minnesota Extension Pictures)
(University of Nebraska Institute of Agriculture and Natural Resources (Aug – 2019))
Two Similar Species:
Resseliella maxima (SGM)
Karshomyia caulicola(WGM) – Sclerotina
Sclerotiorum(University of Minnesota Extension Pictures)
Confirmed Areas Effected in 2019
Rock Co, MN 2019 Symptoms Presence 1st -2nd stage 3rd stage All
Edge position1 < 0.0001 < 0.0001 < 0.0001 0.0003 < 0.0001Insecticide2 0.8343 0.3536 0.0125 0.1081 0.0198Postition X Insecticide 0.2099 0.0802 0.1024 0.5284 0.1881Prob > F 1 Rows 3-6 vs 7-10 (rows 4 ,5 and 8, 9 sampled)2 Hero @ 5 fl oz/acre applied at V1-2 timed to adult emergence in adjacent field
SGM larvae / stem
6.8 2.1 3.8 1.9 10.6 4.00.0
2.0
4.0
6.0
8.0
10.0
12.0
1-2nd 1-2nd +4 rows
3rd 3rd + 4rows
All All +4 rows
Larv
ae/P
lant
Larval age class and position**
Effect of field position on 1st generation SGMA
B
a
ba
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** Edge rows 4-5 vs. rows 8-9
5.4 3.5 3.3 2.4 8.7 6.00.0
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Larval age class and insecticide* application
Effect of insectide on 1st generation SGM
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* Hero @ 5 fl oz/acre applied at V1-V2. Four days after 1st adult emergence
Soybean gall midge adult emergence
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6/26
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les/
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Cumulative SGM adult emergence
Rock Co. Site 2 Rock Co. Site 3
V2V4
V7/R1
V13/R5
Overwintering and two summer flights. Two complete and a partial 3rd generation on soybean.OW adult emergence period ~ 2 weeks, 25-30 days/ generation (generations overlap).
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© 2019 Regents of the University of Minnesota. All rights reserved. Bruce Potter 2019
Predators e.g. Ground beetles Coleoptera (Carabidae)
Parasites e.g. Parasitoid Wasps Hymenoptera (Platygastridae)
SGM BIOLOGICAL CONTROL?
Synopeas myles a parasitoid of the Swede midge Photo: Paul Abram
DNA of platygastrid wasps was detected In SGM larvae from Rock County, MN.Synopeas spp. are known parasitoids of Cecidomyiidae.
Ground beetles are common predators in soybean fields. They have been documented to feed on wheat midge larvae and may feed on SGM larvae and pupae in the soil.
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© 2019 Regents of the University of Minnesota. All rights reserved.
1717Bruce Potter 2019
Fungicide for soybeans
Bruce Potter, IPM educator, Lamberton
Effect of variety and fungicide on soybean yield and moisture (MN 2016-19 )
YIELD @13.5% moisture and 60 lb./bu.
Site 0.9902 a
Variety < 0.0001 **** < 0.0001 **** < 0.0001 **** 0.0003 **** 0.2398 0.4011Fungicide <0.0001 **** 0.0068 **** 0.0667 ** 0.0001 **** 0.8216 0.4061Variety * Fungicide 0.7450 0.2678 0.9199 0.7624 0.9576 0.4131Site * Variety 0.0001 ****Site * Fungicide 0.8602Site * Variety * Fungicide 0.9074% MOISTURE
Site 0.8192Variety < 0.0001 **** < 0.0001 **** < 0.0001 **** 0.0002 *** 0.0035 **** 0.7760Fungicide < 0.0001 **** < 0.0001 **** 0.0001 **** 0.1366 * 0.8326 0.6359Variety * Fungicide 0.0001 **** 0.1407 * 0.0153 *** 0.0583 ** 0.5199 0.1188 *Site * Variety 0.0001 ****Site * Fungicide 0.0001 ****Site * Variety * Fungicide 0.0211 ***aCombined site Analysis of Variance (ANOVA) based on normalized yields and moistures (plot/site mean)§ Due to unique varieties - Morris, and Crookston not included in combined sites
SourceProb > F
COMBINED§ LAMBERTON WASECA ROSEMOUNT MORRIS CROOKSTON
MORRIS CROOKSTONProb > F
SourceCOMBINED§ LAMBERTON WASECA ROSEMOUNT
© 2019 Regents of the University of Minnesota. All rights reserved. Bruce Potter 2019
© 2019 Regents of the University of Minnesota. All rights reserved. Bruce Potter 2019
13.1 13.9 13.910
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None Priaxor Delaro
% M
oist
ure
Fungicide effect on soybean moistureLamberton, Waseca, Rosemount 2019
B
A A
© 2019 Regents of the University of Minnesota. All rights reserved. Bruce Potter 2019
SOYBEAN Fungicide economics southern MN 2016-19
SOYBEAN Fungicide economics WC and NW MN 2016-19
Malvick: Frogeye Leaf Spot• Frogeye leaf spot (Cercospora
sojina) occurrence is increasing in Southern MN.
• Symptoms• Lesions on leaves begin as
small, dark, water-soaked spots.
• Develop into brown spots surrounded by a darker reddish-brown or purple ring.
• centers of the lesions turn light brown or light gray as they age.
• Lesions eventually merge, covering large areas of the leaves, resulting in defoliation.
• UKY lab confirms some MN populations are resistant to Qol (strobilurin) fungicides
Objectives:• Screen waterhemp control from 13 residual herbicides
at 0.25X and 0.50X micro-rates as pre-liminary for micro-rate program.
• Utilize data from pre-liminary to target a cost effective and efficacy effective micro-rate program for 2020.
• Screen soybean crop injury from 13 residual herbicides at 1X and 2X rates
2X0.50X 1X0.25X
Data/Conclusions:
Table 4. Soybean growth reduction and yield estimate at 1X and 2X rates.Product Active Ingredient June 19 July 4 October 18
1X Rate 2X Rate 1X Rate 2X Rate 1X Rate 2X Rate-------------------------%---------------------------- ------Bu/A------
FirstRate Cloransulam 0 0 15 0 40 52Prowl Pendimethalin 5 15 0 10 50 95Dimetric EXT Metribuzin 2.5 10 0 0 37 81Cadet Fluthiacet 0 0 0 0 53 87Flexstar Fomesafen 0 0 0 0 82 76Sharpen Saflufenacil 10 12.5 0 0 20 88Blanket Sulfentrazone 10 30 0 0 68 108Valor SX Flumioxazin 60 85 15 60 104 74Warrant Acetochlor 35 60 0 20 65 92Dual II Magnum S-metolachlor 5 22.5 0 0 20 67Outlook Dimethenamid-P 15 15 0 0 62 89Zidua Pyroxasulfone 5 20 0 0 66 86LSD (0.1) 10 11 28
■ Micro-rates screening was successful. Exponential rate increase ratings were graphed, trendline applied, and trendline equation determined will base combination treatments in 2020 from this data (Ask David Kee for Full Article Summary).
■ Soybean crop safety below. Yields were pod estimates, but data is proportional to itself. Valor SX caused the greatest injury at 2X rate compared to 1X rate (1X rate = single application max on label).
Objectives:• Evaluate combinations of soil residual herbicides
targeting giant ragweed control.• Secondarily, evaluate waterhemp control.
• Target economical treatments to compete with current recommendations.
• Exceed 90% giant ragweed control 60 days after treatment.
Data/Conclusions:■ Giant ragweed pressure was much lower than anticipated; giant ragweed is
best controlled in a DT soybean system by more than one residual mode of action (Ask David Kee for Full Article Summary).
■ Waterhemp data (below) was taken on a moderate infestation. FirstRateand Xtendimax were weak EPOST options. FirstRate+Xtendimax had antagonism.
■ Yield was unaffected by herbicide or weed pressure.Table 3. Waterhemp control in soybean in 2019.
App. Waterhemp Control SoybeanTreatmenta Rate Codeb B+15c B+30 B+45 B+60 Yield
oz/A* or fl oz/A -----------------%----------------- Bu/ASharpen+Zidua 1+2.5* A 100 100 98 99 65Sharpen+Zidua / FirstRate 1+2.5* / 0.3* A / B 100 98 95 100 62Sharpen+Zidua / Xtendimax 1+2.5* / 22 A / B 100 98 99 99 63Sharpen+Zidua / FirstRate+Xtendimax 1+2.5* / 0.3*+22 A / B 100 98 98 100 60Authority First 6* A 55 75 63 62 58Authority First / FirstRate 6* / 0.3* A / B 73 70 70 79 66Authority First / Xtendimax 6* / 22 A / B 100 96 98 99 59Authority First / FirstRate+Xtendimax 6* / 0.3*+22 A / B 100 90 93 93 65Xtendimax 22 A 0 0 20 4 62Xtendimax / FirstRate 22 / 0.3* A / B 5 18 23 15 58Xtendimax / Xtendimax 22 / 22 A / B 100 81 80 74 67Xtendimax / FirstRate+Xtendimax 22 / 0.3*+22 A / B 95 78 75 69 58FirstRate 0.3* B 43 53 35 26 63Xtendimax 22 B 100 73 85 77 53FirstRate+Xtendimax 0.3*+22 B 87 64 44 42 57Cobra+COC 10+24 B 100 95 99 99 52Flexstar 16 B 100 74 80 95 61Roundup Powermax+Class Act NG 64+2.5%v/v B 41 38 40 15 62Untreated Check - - 0 18 13 8 55
LSD (0.1) 24 24 24 18 NS
Questions? Contact [email protected] me on twitter @DavidKeeMNOr @MNsoybean