Results 171 to 180 of about 6,607 (199)

Plant invasion (Conyza canadensis) & microbiota

2021
Plant invasion (Conyza canadensis) & ...
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Conyza canadensis

2006
Enthält 7 Bilder des Kanadischen Berufkrauts.
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[Studies on the chemical constituents from Conyza canadensis].

Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials, 2012
To study the chemical constituents of Conyza canadensis.Chromatographic methods including HP20 macroporous resin, silica gel, Sephadex LH-20 and eighteen alkyl silane bonding silica gel (ODS) were used for the isolation and purification of Conyza canadensis.
Hong-Li, Liu, Bai-Lian, Liu, Guo-Cai, Wang, Yi, Dai, Wen-Cai, Ye, Yao-Lan, Li   +5 more
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Conyza canadensis (L.) Cronquist

2009
Pflanzensammlung Dietmar Brandes: Digitale ...
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Conyza canadensis seed ascent in the lower atmosphere

Agricultural and Forest Meteorology, 2009
Abstract Long-distance dispersal of wind dispersed plant seed is dependent on seeds ascending in the atmosphere's surface boundary layer (SL). However, seed dispersal research often focuses on the near-surface dynamics of abscission and deposition, with little attention paid to seed ascent and transport beyond the surface boundary layer. Our research
Joseph T. Dauer, David A. Mortensen, Edward C. Luschei, Scott A. Isard, Elson Shields, Mark J. Van-Gessel   +5 more
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Essential Oil ofConyza canadensis(L.) Cronq.

Journal of Essential Oil Research, 2000
Abstract The essential oil of Conyza canadensis was investigated by GC, GC/MS and 1H-NMR spectroscopy. More than 50 components were identified. The main constituents were limonene (70.0%) and trans-α-bergamotene (7.0/%).
Anna Lis, Józef Góra
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Controlled experiments to predict horseweed (Conyza canadensis) dispersal distances

Weed Science, 2006
Abstract Controlled-environment experiments were conducted to predict the dispersal distance of horseweed seed. Seed were released from a fixed height and collected at three distances from the introduction point along a 6-m wind tunnel. Dispersal potential was assessed at wind speeds of 8 and 16 km hr−1 and release heights of 50.8 and 76.2 cm.
Joseph T. Dauer, David A. Mortensen, Robert Humston   +2 more
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Factors affecting germination of horseweed (Conyza canadensis)

Weed Science, 2006
The influence of environmental factors on germination and emergence of horseweed was examined in growth chamber experiments. Germination was highest (61%) under 24/20 C day/night temperature under light. Horseweed seed germination was observed under both light (13 h photoperiod) and complete darkness (24 h), but germination under continuous darkness ...
Vijay K. Nandula, Thomas W. Eubank, Daniel H. Poston, Clifford H. Koger, Krishna N. Reddy   +4 more
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Emergence and survival of horseweed (Conyza canadensis)

Weed Science, 1997
Horseweed emergence and survival were evaluated in no-tillage soybean and corn at Rosemount, MN, and Ames, IA, from the fall of 1992 through the summer of 1995. Most of the horseweed at both locations emerged in the fall. Winter survival of fall-emerged seedlings ranged from 59 to 91%.
Douglas D. Buhler, Micheal D. K. Owen
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Influence of Tillage on Horseweed,Conyza canadensis

Weed Technology, 1988
Conservation tillage systems for cotton production were monitored for their influence on horseweed populations. Without fall tillage, horseweed became established and was present the following spring. Disking in the fall or spring controlled horseweed for the subsequent cotton crop.
Steven M. Brown, Ted Whitwell
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