Full TGIF Record # 15153
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/1986.pdf#page=178
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Northam, F. E.; Callihan, R. H.
Author Affiliation:University of Idaho, Moscow, Idaho
Title:Germination of Four Annual Grass Weeds at Three Temperatures
Meeting Info.:Meeting Held: March 18-20, San Diego, CA.
Source:Proceedings of the Western Society of Weed Science. Vol. 39, March 1986, p. 173.
Publishing Information:Logan, UT: Plant Science Dept., Utah State University.
Keywords:TIC Keywords: Germination; Annual grasses; Temperatures; Bromus
Abstract/Contents:"The seeds of four annual grass weeds of northern Idaho were germinated for 49 days at 8 C, 18 C and 28 C with a photoperiod of 14 h light/10 h dark. The species were interrupted windgrass (Apera interrupta (L.) Beauv.), downy brome (Bromus tectorum L.- BROTE), Medushahead (Taeniatherum caput-medusae (L.) Nevski-ELYCM) and Ventenata (Ventenata dubia (Leers) Coss & Dur). The seed lots were collected during June and July 1984. The medushahead and downy brome florets were deawned within 10 days of collection to facilitate handling and placement in the germinaton plates. The experimental design was a split plot with repeated measures with temperatures as main plots, species as split plots and counting days as repeated measures. Five petri plates (30 seed per plate) were prepared for each species at each temperature. The experiment was run twice; the first time was six months after seed harvest and the second was 8.5 months after harvest. Medushahead germination at 8 C was 76%, windgrass 62%, downy brome 45%, and Ventenata 24% (Table). Maximum germination for all species occurred at 18 C. Again medushahead was highest with 96% germination, Ventenata 93%, interrupted windgrass 78%, and downy brome 48%. The highest germination at 28 C was Ventenata with 50%, downy brome was next with 37%, then medushahead with 33% and windgrass was 7%. The number of days to 75% of maximum germination was used as a germination speed indicator (Table). Downy brome germinated more rapidly than the other species at all temperatures, averaging five days to 75% of maximum germination at all temperatures. Downy brome also had the most uniform germination. Windgrass with the slowest germination required an average of 28 days to 75% of maximum germination for the three temperatures. Ventenata averaged ten days and medushahead averaged fifteen days to 75% of maximum germination for the three temperatures. Germination speed within species showed that windgrass germinated fastest at 8 C (18 days at 8 C, 23 days at 18 C and 35 days at 28 C). Medushahead germinated fastest at 18 C (6 days at 18 C, 11 days at 8 C and 30 days at 28 C), Ventenata also germinated fastest at 18 C (6 days at 18 C, 10 days at 28 C, and 13 days at 8 C). Downy brome was slightly faster at 28 C than at 18 C (2 days at 28 C, 3 days at 18 C and 8 days at 8 C). All four species germinated across a wide range of temperatures but medushahead, downy brome and interrupted windgrass performed best at low to moderate temperatures while Ventenata did best at moderate to high temperatures. Germination speed among species varied widely."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Northam, F. E., and R. H. Callihan. 1986. Germination of Four Annual Grass Weeds at Three Temperatures. Proc. West. Soc. Weed Sci. 39:p. 173.
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    Last checked: 05/04/2017
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MSU catalog number: SB 610 .W43 v.39
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