Results 181 to 190 of about 2,966 (209)
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The Fate of Nitrofen in Rape, Redroot Pigweed, and Green Foxtail
Weed Science, 1971The fate of 2,4-dichlorophenyl p-nitrophenyl ether (nitrofen) in the foliage of rape (Brassica campestris L. ‘Echo’), redroot pigweed (Amaranthus retroflexus L.), and green foxtail (Setaria viridis (L.) Beauv.) was investigated with the aid of 14C-nitrofen. Only limited amounts of the label were translocated in these species.
D. Hawton, E. H. Stobbe
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Atrazine Phytotoxicity to Common Bean and Redroot Pigweed under Different Temperatures
Weed Science, 1992The basis for increased phytotoxicity of foliar-applied atrazine at high temperature in common bean and redroot pigweed was investigated. Plants were grown under low (15/10 C), medium (25/20 C), or high (35/30 C) temperature regimes. Atrazine absorption by plants grown under different temperatures increased with increasing temperatures in both species.
Kassim Al-Khatib +3 more
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ALS inhibitor resistance in populations of Powell amaranth and redroot pigweed
Weed Science, 2001Abstract In 1997, farmers in Ontario, Canada, reported failure of some ALS-inhibiting herbicides to provide adequate control of pigweed species. Growth room experiments were conducted to confirm resistance to ALS inhibitors in populations of Powell amaranth and redroot pigweed.
Gabrielle M. Ferguson +2 more
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Redroot Pigweed (Amaranthus retroflexus) Control with Bentazon plus Additives
Weed Science, 1977A water-soluble linseed oil formulation was compared with emulsifiable linseed oil as an additive to bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-(4)3H-one 2,2-dioxide] for redroot pigweed (Amaranthus retroflexusL.) control. A water-soluble linseed oil formulation as an additive to bentazon controlled redroot pigweed better than did an emulsifiable ...
J.D. Nalewaja, K.A. Adamczewski
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Photosynthesis and Transpiration Response of Redroot Pigweed (Amaranthus retroflexus)
Weed Technology, 1994Redroot pigweed is a major weed worldwide. Increasing emphasis on modeling physiological processes of weeds for use in weed control decision support systems requires a knowledge of the response of weeds to resource levels and environmental conditions. The purpose of this study was to determine functional relationships for carbon exchange rate (CER) and
David C. Nielsen, Randy L. Anderson
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Differential Gas Exchange Responses of Two Biotypes of Redroot Pigweed to Atrazine
Weed Science, 1976Differences were shown to exist in photosynthetic rate, transpiration rate, and carbon dioxide leaf diffusive resistance between atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] susceptible (S) and resistant (R) plants of redroot pigweed (Amaranthus retroflexusL.).
L. D. West, T. J. Muzik, R. E. Witters
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Late Season Redroot Pigweed Control in Sugarbeet with Over-the-Top Glyphosate
Journal of Sugarbeet Research, 2006The benefits and risks of carefully applying glyphosate to large redroot pigweed (Amaranthus retroflexus L.) plants without contacting sugarbeet were evaluated. Glyphosate applied to redroot pigweed growing in close association with sugarbeet reduced or tended to reduce sugarbeet (Beta vulgaris L.) root yield and extractable sucrose yield when compared
Richard R. Evans, Alan G. Dexter
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Development of Redroot Pigweed Is Influenced by Light Spectral Quality and Quantity
Crop Science, 2002ABSTRACTLight quantity (photosynthetic photon flux density, PPFD) and quality (red:far‐red ratio, R:FR) may affect phenological development of weed species growing under a crop canopy. An indoor study was conducted to quantify the effects of incident PPFD and R:FR on development and dry matter accumulation of redroot pigweed (Amaranthus retroflexus L.).
Irena Rajcan +3 more
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Influence of emergence time and density on redroot pigweed(Amaranthus retroflexus)
Weed Science, 1998Field studies were conducted at two locations near Manhattan, KS, in 1994 and 1995 to determine the influence of density (0.5, 1, 2, 4, and 12 plants m−1row) and time of emergence on redroot pigweed growth in monoculture or with sorghum. Redroot pigweed was seeded at sorghum planting and at the three- to four-leaf stage of sorghum in plots with sorghum
Stevan Z. Knezevic, Michael J. Horak
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Growth Regulator Effects of Propiconazole on Redroot Pigweed (Amaranthus retroflexus)1
Weed Technology, 2003Nonfungicidal effects of agricultural fungicides on crop plants have been reported previously; however, there are few reports of nontarget effects of fungicides on weedy species. Field research trials in Oregon demonstrated that the growth of several broadleaf weeds was reduced after multiple applications of the fungicide propiconazole.
BRADLEY D. HANSON +4 more
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