Full TGIF Record # 12501
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Publication Type:
Author(s):Pike, David R.
Author Affiliation:Assistant Agronomist, Deptartment of Agronomy, University of Illinois, Urbana, IL
Title:An evaluation of some growth characteristics of four weedy grasses
Section:Physiology, edaphic factors and control of specific weeds
Other records with the "Physiology, edaphic factors and control of specific weeds" Section
Meeting Info.:Winnipeg, Manitoba, Canada: December 4-6, 1984
Source:Proceedings: North CentralWeed Control Conference. Vol. 39, 1984, p. 94-95.
# of Pages:2
Publishing Information:[Urbana, Illinois: Department of Agronomy, University of Illinois]
Keywords:TIC Keywords: Growth; Germination; Characteristics; Herbicide resistance; Weed control; Alopecurus; Setaria viridis; Panicum dichotomiflorum
Abstract/Contents:"Research was conducted at the University of Illinois greenhouse facilities and on the South Farm research center during 1984. Four grasses which have diverse biological characteristics and tolerance for herbicides, giant foxtail, giant green foxtail, woolly cupgrass, and fall panicum were selected for testing. The objective of the experiment was to review growth and germination characteristics for possible attributes which permit these grasses to become serious pests. The study was begun by planting the seeds of the four species in 10 cm peat pots in the greenhouse and then transferring them to the field when two to three inches tall. A total of three plantings were made, 2 May, 23 May, and 2 July 1984. Plants were watered after transferring to the field to avoid severe stress. Clumps of grasses arising from a single peat pot were cut for weight measurement and height noted. At weekly intervals seeds were shattered from heads and collected. Comparing the development of grasses, giant foxtail grew the tallest in all three plantings. Giant green foxtail matured to the seed production stage earlier in the first planting and thereafter followed giant foxtail in maturity. Woolly cupgrass and fall panicum maturity lagged behing the foxtails in all three plantings. The amount of fall panicum dry matter production was 30 to 60 percent greater than the other grasses in all three plantings. Woolly cupgrass was the quickest to decline after maturity. Preliminary results on giant foxtail seed indicate that differences may exist in the germination between seed lots collected at different times from the same heads and from seed collected at the same time from heads emerging at different times. Germination of the foxtail seed varied from 6 to 30 percent without stratification. Germination of woolly cupgrass anf fall panicum averaged one percent without stratification. Woolly cupgrass seed germination increased to 25 percent by weathering two months on the soil surface in the late summer. Similar weathering of the seeds of the other three species did not affect germination. Giant green foxtail seed germination peaked on day three and giant foxtail germination peaked one day later at diurnal temperatures of 16 to 32 degrees C. At temperatures of 15 to 27 degrees C giant green foxtail germination peaked on day six and giant foxtail germination peaked on day twelve."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Pike, D. R. 1984. An evaluation of some growth characteristics of four weedy grasses. Res. Rep. North Cent. Weed Control Conf. 39:p. 94-95.
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MSU catalog number: SB 610 .N6
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