Life cycle of the marsh grass, Scolochloa festucacea

1973 ◽  
Vol 51 (9) ◽  
pp. 1661-1668 ◽  
Author(s):  
Alan L. Smith
Keyword(s):  
Life Cycle ◽  
Great Plains ◽  
Low Temperatures ◽  
Dominant Species ◽  
Freezing Point ◽  
Northern Great Plains ◽  
Missouri Coteau ◽  
Marsh Grass

This paper describes the life cycle of Scolochloa festucacea, a dominant species in potholes subjected to regular burning or mowing throughout the Drift Prairie and Missouri Coteau of the Northern Great Plains. Vernal growth is initiated at extremely low temperatures; some plants grow in water at the freezing point. Flowers develop in June if the pothole is inundated in the spring. Mature caryopses drop in July, but do not germinate until the next year. Tillers and new rhizomes are produced in August, followed by senescence in late September – early October.

Life-Cycle Assessment of the Beef Cattle Production System for the Northern Great Plains, USA

2013 ◽  
Vol 42 (5) ◽  
pp. 1386-1394 ◽  
Author(s):  
Christopher D. Lupo ◽  
David E. Clay ◽  
Jennifer L. Benning ◽  
James J. Stone
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Beef Cattle ◽  
Great Plains ◽  
Production System ◽  
Northern Great Plains ◽  
Cattle Production ◽  
Beef Cattle Production

Life Cycle Assessment of a Modern Northern Great Plains U.S. Swine Production Facility

2010 ◽  
Vol 27 (12) ◽  
pp. 1009-1018 ◽  
Author(s):  
James J. Stone ◽  
Christopher R. Dollarhide ◽  
Ramith Jinka ◽  
Robert C. Thaler ◽  
Chris E. Hostetler ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Great Plains ◽  
Northern Great Plains ◽  
Production Facility ◽  
Swine Production

The life cycle impacts of feed for modern grow-finish Northern Great Plains US swine production

2012 ◽  
Vol 106 (1) ◽  
pp. 1-10 ◽  
Author(s):  
James J. Stone ◽  
Christopher R. Dollarhide ◽  
Jennifer L. Benning ◽  
C. Gregg Carlson ◽  
David E. Clay
Keyword(s):  
Life Cycle ◽  
Great Plains ◽  
Northern Great Plains ◽  
Swine Production

scholarly journals Widespread Occurrence of the Aecial Stage of Sunflower Rust Caused by Puccinia helianthi in North Dakota and Minnesota in 2008

Plant Disease ◽  
2009 ◽  
Vol 93 (6) ◽  
pp. 668-668 ◽  
Author(s):  
S. Markell ◽  
T. Gulya ◽  
K. McKay ◽  
M. Hutter ◽  
C. Hollingsworth ◽  
...  
Keyword(s):  
Life Cycle ◽  
North Dakota ◽  
Great Plains ◽  
Growing Season ◽  
Dew Point ◽  
Sexual Cycle ◽  
Northern Great Plains ◽  
Widespread Occurrence ◽  
Initial Inoculum ◽  
Puccinia Helianthi

Sunflower rust caused by Puccinia helianthi (Schw.) is widespread in North America and occurs annually on cultivated sunflower (Helianthus annuus L.) and wild annual and perennial Helianthus spp., although severity on the U.S. sunflower crop has been increasing in recent years (2). P. helianthi is a autoecious, macrocyclic rust, but the aecial stage is rarely observed in the field (1,3,4). In most years, the earliest appearance of sunflower rust in North Dakota (ND) and surrounding states usually occurs in early August as the uredinial stage. Initial inoculum can result from urediniospores that overwinter in the Northern Great Plains, urediniospores blown in from areas south of North Dakota, or basidiospores completing the life cycle. However, aecia have been noted very infrequently and never widespread, indicating initial inoculum is usually urediniospores. Aecia of P. helianthi were first observed on 24 June 2008 in a commercial sunflower field (confection hybrid CHS 3126) near Mohall, ND. Aecia cups measuring 0.2 to 0.3 mm in diameter were observed in clusters that were 1 to 7 mm wide in diameter and containing as many as 150 cups. Aecia cups were bright orange but turned brown-black as they senesced. As many as 15 aecial clusters occurred on individual leaves or cotyledons. Aeciospores were ellipsoid, hyaline, and measured approximately 20 μm in diameter. On 4 July 2008, uredinia were first observed in the same Mohall, ND field. At that time, uredinia, aecia, and senesced aecia could all be found on the same leaves. In a non-fungicide-treated strip of the field, pustule coverage on the lower leaves was 10 to 20% by mid-July, pustule coverage on the upper four leaves of plants in the untreated strip was 56% by 27 August, and yield at harvest was less than 200 kg/ha. The rest of the field was sprayed twice with fungicides and yielded 1,571 kg/ha, which is similar to the statewide yield average of 1,573 kg/ha in 2008. To determine the prevalence of aecia in the primary growing regions of ND and Minnesota (MN), surveys were conducted in 75 sunflower fields in 18 counties between 22 and 24 July in ND and 34 fields in 8 counties between 17 and 31 July in MN. Incidence of aecia and uredinia were determined by visual observation of a minimum of 20 plants scouted in a ‘W’ pattern in the field. Rust was found in 31 and 53% of fields in ND and MN, respectively. In fields where rust was found, both aecia and uredinia were observed in 37% of the fields, aecia only in 29% of the fields, and uredinia only in 34% of the fields. Although it is uncertain why aecia were widespread in 2008, night temperatures in Mohall, ND, where aecia were first observed, reached the dew point temperature on 51 of 61 days in June and July, suggesting that dew or fog likely formed. Thus, favorable conditions for germination and infection early in the growing season indicate widespread occurrence of rust was likely a result of local inoculum sources. The early appearance of aecia is cause for concern for two reasons: significant yield loss can occur when rust appears early in the growing season; and the presence of aecia suggest that the pathogen completed its sexual cycle. When P. helianthi completes its life cycle it is likely that a greater diversity of races will result (4). References: (1) D. L. Bailey. Univ. Minn. Tech. Bull. 16:1, 1923. (2) D. Berglund. Natl. Sunflower Assoc. Online publication. /Berglund_2007_NSA_Survey_08. 2008. (3) H. S. Jackson. Mem. Torrey Bot. Club 18:1, 1931. (4) G. A. Kong et al. Australas. Plant Pathol. 28:320, 1999.

scholarly journals Diversity and Dominant Species of Ground Beetle Assemblages (Coleoptera: Carabidae) in Crop Rotation and Chemical Input Systems for the Northern Great Plains

1998 ◽  
Vol 91 (5) ◽  
pp. 619-625 ◽  
Author(s):  
Michael M. Ellsbury ◽  
Janine E. Powell ◽  
Frank Forcella ◽  
W. David Woodson ◽  
Sharon A. Clay ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Great Plains ◽  
Dominant Species ◽  
Ground Beetle ◽  
Northern Great Plains ◽  
Beetle Assemblages
Sign in / Sign up

Export Citation Format

Share Document