HIGHLIGHTS OF CANOLA DISEASE SURVEY IN EAST-CENTRAL ND

 

A canola disease survey was conducted by the NDSU Extension Service in 39 swathed fields in Stutsman, Eddy, Foster, Wells and Sheridan counties during August 15-21. Fields were selected at random for the survey. Some fields were treated with fungicides. Field incidence of sclerotinia (white mold), based on examining 40 stems/field, ranged from 0 to 83%. Field incidence of sclerotinia by county: Stutsman = average of 28% and range of 0-58%, Eddy and Foster = average of 25% and range of 3-70%, Wells = average of 40% and range of 3-83%, and Sheridan = average of 38% and range of 0-73%. Estimated seed yield loss is about 0.7% for each percent of plants infected. The Eddy and Foster county average of 25% infection would correspond with about 18% yield loss. The highest incidence was 83% in a Wells county field and the corresponding yield loss estimate would be 58%.

 

The disease survey also included Alternaria black spot, aster yellows and blackleg. Incidence of aster yellows and blackleg generally were low. Aster yellows was found at very low levels in 14% of fields surveyed. Blackleg was found in 12 of 39 fields. In affected fields, blackleg incidence ranged from 3 to 20% of inspected plants. All fields had Alternaria black spot on seed pods but severity was low.

 

WINTER WHEAT VARIETY PERFORMANCE AT CARRINGTON

 

The following table lists five-year averages (1997-2001) for winter wheat variety performance at the NDSU Carrington Research Extension Center:

 

Winter Wheat Variety

Grain Protein (%)

Test Weight (lb/bu)

Grain Yield (bu/ac)

Agassiz

13.4

60.3

46.8

Alliance

12.1

58.9

49.5

Arapahoe

13.8

60.2

59.2

CDC Kestrel

12.0

58.6

57.9

Crimson*

13.6

60.2

49.3

Elkhorn

13.4

60.6

55.9

Harding

14.1

58.9

54.6

Jerry

13.2

59.1

58.1

NeKota

13.4

60.0

49.5

Norstar*

12.5

60.1

57.8

Ransom

13.2

59.4

58.4

Roughrider

14.1

60.7

49.8

Seward

12.4

61.0

58.2

Tandem*

13.6

60.1

52.8

Windstar*

13.6

60.5

56.6

*4-year averages.

 

See the following website for 2001 winter wheat variety performance at Carrington:

www.ag.ndsu.nodak.edu/carringt/agronomy/2001_variety_trials.htm

 

SCAB RATINGS FOR WHEAT VARIETIES AT CARRINGTON

 

As a reference in evaluating wheat variety tolerance to scab (Fusarium head blight), the following are scab ratings of HRS and durum wheat varieties tested in dryland, recrop trials at the NDSU Carrington Research Extension Center in 2001. The trials were planted April 30 on durum ground. 

 

Scab field severity ratings from dryland recrop HRS wheat variety trial, Carrington, 2001.

HRS variety

Scab field severity*

HRS variety

Scab field severity*

McVey

0.7

Dandy

7.1

Coteau

2.9

Norpro

8.1

Gunner

3.0

Parshall

8.2

Knudson

3.4

HJ98

9.2

Alsen

3.5

Grandin

9.9

Trenton

3.5

Reeder

11.3

Ivan

3.9

Russ

12.0

Ember

4.2

AC Superb

12.6

Glenlea

4.9

Keystone

13.5

Hagar

5.2

Mercury

14.2

Glupro

6.0

Keene

17.0

Ingot

6.7

Forge

17.9

Aurora

6.8

Walworth

23.7

Butte 86

7.1

Oxen

32.4

*Scab field severity = incidence x head severity; LSD (0.05) = 8.5.

 

 

Scab field severity ratings from dryland recrop durum variety trial, Carrington, 2001.

Durum variety

Scab field severity*

Durum variety

Scab field severity*

Belzer

7.7

AC Pathfinder

15.7

Ben

8.2

Rugby

15.9

Kari

8.9

AC Navigator

17.0

Mountrail

11.3

AC Melita

17.7

AC Morse

11.5

Plaza

17.9

Renville

11.5

Munich

19.6

Plenty

11.7

AC Avonlea

22.8

Maier

11.9

Monroe

29.1

Pierce

13.4

Dressler

37.7

Lebsock

14.6

 

 

*Scab field severity = incidence x head severity; LSD (0.05) = 14.0.