Wheat pest calendar

Mary Burrows, David Weaver,

Fabian Menalled

Objective• To develop a wheat pest calendar to assist

producers, county agents, and crop consultants to identify and manage common wheat disease, insect, and weed pests.

Results• 2000 copies printed• Lots of positive feedback• PDF is available on Extn Plant Path

website http://www.msuextension.org/plantpath/

• Next year: Pulse pest calendar funded by NPGA

• Any future interest in barley calendar, or other crop or theme?

Wheat virus variety trials and on-farm fungicide

demonstration trials

Mary Burrows, Luther Talbert, Tom Blake, Alan Dyer, Phil Bruckner, Dan Picard, Joe Broesder, Jesse

Fulbright, Gregg Carlson

Objectives • 1. Evaluate widely planted winter wheat, spring wheat

and barley varieties in Montana for susceptibility to Wheat streak mosaic virus and Triticum mosaic virus

• 2. Evaluate early-season fungicides in wheat in on-farm demonstration trials.

• 3. Disseminate the results of these studies to growers in Montana and throughout the Great Plains region.

 

Disease cycle of WSMV

Winter wheat

Winter wheat yield

Avg yield loss = 6%

Average yield loss (%) due to WSMV, 2008-2010

*Hail damage

Negative # means yield gain from WSMV

Variety 2008* 2009 2010*

CDC Falcon -25.1 23.8 -0.7Genou 24.9 14.3 -5.0Jagalene 10.3 14.5 18.1Jerry 13.0 -0.3Ledger -31.2 17.7Mace 3.3Morgan 24.2 20.4 9.6MT0552 (Decade) 16.5MTV0734 37.1 18.9Neeley 42.5 32.9Pryor -14.4 14.0 21.1Rampart 15.6 -1.7 -18.0Rocky 19.0 10.7Tiber 40.9 17.7 -1.0Yellowstone 13.7 17.3 11.3Average 13.1 16.3 6.0

Spring wheat

The hope

Later reality

WSMV-inoculated spring wheat plots were more severely damaged than the controls

No inoculation WSMV-CI WSMV-HI Buffer

Spring wheat yields, 2010

Average yield loss (%) due to WSMV, 2008-2010

Variety 2008 20092010

WSMV-CI2010

WSMV-HIAmidon 8.8 38.7 47.8 46.7Choteau 33.6 51.9 74.7 67.2Conan 24.2 32.5 36.6 46.6Corbin 18 31.9 41.5 54.7Ernest 34.7 57.3 70.4 73.8Fortuna 32.7 42.2 59.8 57.3Hank 21.8 28.4 39.2 33.8McNeal 39.9 50.4 66.0 60.3Reeder 22.8 34.2 52.0 51.9Scholar 45.9 44.3 46.9 48.1Haxby N/A 13.3 36.2 42.3Metcalfe N/A 16.7 41.6 48.2Mean 28.2 36.8 51.1 52.6

% Yield reduction due to WSMV inoculation

Objective 2. Evaluate early-season fungicides in wheat in on-farm demonstration

trials.

Yield resultsHill NARC Pondera Liberty

Treatment bu/A stderr bu/A stderr bu/A stderr bu/A stderr1 Control 107.6 6.8 79.1 3.0 62.1 11.0 62.4 3.52 Headline 3 oz/A 117.8 6.1 85.1 4.7 62.1 11.0 55.7 6.73 Headline 6 oz/A 109.7 7.0 79.7 2.5 72.4 4.3 59.7 5.34 Quilt 14 oz/A 126.8 5.8 72.2 6.0 55.1 6.3 64.0 5.55 Quilt 7 oz/A 109.0 11.8 86.0 1.6 62.1 11.0 62.9 3.56 Stratego 8 oz/A 119.7 7.0 83.3 4.7 58.0 4.7 68.7 6.27 Stratego 4 oz/A 120.1 2.4 77.3 3.4 61.9 4.7 68.9 5.28 Proline 480 SC 5 oz/A 107.0 4.5 82.0 2.2 62.1 11.0 70.5 2.99 Tilt 2 oz/A 127.0 6.5 81.1 5.2 64.8 6.7 53.6 4.8

Means 116.1 2.7 80.6 1.4 62.3 1.6 62.9 2.0p-value rep 0.088 0.252 0.354 0.151p-value treatment 0.180 0.337 0.706 0.199

LSD Treatment NS NS NS NS

R sq 0.5 0.4 0.3 0.4CV 10.9 9.6 19.5 15.1

Additional data from NARC site

Variable AverageSignificant

differences?

Moisture 9.5% NS

Test wt 61.4 lb/bu NS

Protein 13.2% NS

Sawfly rating 9.78 NS

Dissemination of this information• Grant term:

– Presentations: four in-state presentations (420 attendees); in June I was invited to Rapid City, SD to speak to the NCERA-184 Cereal Pathology group about wheat viruses.

– Appearances on Montana Ag Live: three appearances (approximately 20,000 viewers per appearance)

– AgAlerts: four agalerts related to viruses and fungicide use in cereals with 406 viewers.

– Publications:• M. Burrows, D. Weaver and M. Menalled. 2011. Common Montana Wheat Pests.

Calendar.• Burrows, M., M. Moffet, P. Bruckner, J. Berg, M. Johnston. Evaluation of

fungicides for control of stem rust in Montana, 2010. Plant Disease Management Reports 4: CF037. (Funded by MWBC, 2009)

• K. McVay, M. Burrows, F. Menalled, K. Wanner. 2010. Montana wheat production guide. MSU Extension Publications EB0197.

• Upcoming: lots more!

Plans for next year• Continue WSMV variety trials• On-farm demonstration trials for foliar fungicides on

dryland winter wheat– Tillering stage applications– 4 counties (Pondera, Toole, Liberty, Hill), – 2 research stations (Conrad, Havre)– Fall applications at research stations: relationship

to winterkill?– Spring applications all sites: ‘plant health benefit’

in absence of disease pressure• Any other ideas?