Results 171 to 180 of about 2,966 (209)

Amaranthus retroflexus (redroot pigweed) poisoning in cattle

Journal of the American Veterinary Medical Association, 1994
Amaranthus retroflexus (redroot pigweed)-induced nephrotoxicity was diagnosed in 6 herds of cattle from 3 counties in southwest Missouri. Forty-eight cows and calves died and another 35 were clinically affected. Serum urea nitrogen concentration, determined in 4 affected calves, was between 55 and 284 mg/dl, and serum creatinine concentration was ...
S W, Casteel, G C, Johnson, M A, Miller, H J, Chudomelka, D E, Cupps, H E, Haskins, H S, Gosser   +6 more
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Predispersal seed predation of redroot pigweed (Amaranthus retroflexus)

Weed Science, 2003
Abstract Field experiments were conducted in 1999 and 2000 to determine if (1) seed predation of redroot pigweed plants occurred in agricultural fields, (2) corn-cropping patterns could be manipulated to influence the quantity of weed seed predation, and (3) alterations in corn canopies affected the microenvironment, possibly influencing predator ...
Nancy DeSousa, Jason T. Griffiths, Clarence J. Swanton   +2 more
openaire   +1 more source

Weed Competition in Cotton. II. Cocklebur and Redroot Pigweed

Weed Science, 1971
Competitive effects of cocklebur (Xanthium pensylvanicumWallr.) and redroot pigweed (Amaranthus retroflexusL.) on cotton (Gossypium hirsutumL.) were evaluated in four experiments at two locations in Alabama during the period 1966 to 1968. Cocklebur was more competitive with cotton than was pigweed on Norfolk sandy loam soil.
Gale A. Buchanan, Earl R. Burns
openaire   +1 more source

Soil water thresholds for photoinduction of redroot pigweed germination

Weed Science, 1997
Perception of light by phytochrome is a mechanism that triggers weed seed germination in response to soil disturbance. Photoconversion of phytochrome from the red light absorbing form to the active far-red absorbing form depends on hydration of phytochrome.
Robert S. Gallagher, John Cardina
openaire   +1 more source

Amaranthus retroflexus (redroot pigweed): Inability to cause renal toxicosis in rabbits

American Journal of Veterinary Research, 1985
SUMMARY Rabbits fed Amaranthus retroflexus (redroot pigweed) did not develop lesions of renal toxicosis reported in other species fed this plant. In feeding trials using adult and weanling rabbits, A retroflexus did not produce indications of renal involvement in rabbits.
G J, Schamber, A R, Misek
openaire   +2 more sources

Interference of redroot pigweed (Amaranthus retroflexus) with snap beans

Weed Science, 2003
Abstract Snap beans are a common processing vegetable whose yield and quality can be reduced when a few weeds emerge with or soon after the crop. The effect of redroot pigweed's emergence time and density on snap bean growth and yield was studied. Redroot pigweed, at four densities, was seeded with snap beans (early) or at the first trifoliate leaf ...
Joesph N. Aguyoh, John B. Masiunas
openaire   +1 more source

ATRAZINE RESISTANCE IN AMARANTHUS RETROFLEXUS (REDROOT PIGWEED) AND A. POWELLII (GREEN PIGWEED) FROM SOUTHERN ONTARIO

Canadian Journal of Plant Science, 1980
Screening trials with the herbicide atrazine and a morphological examination of atrazine-resistant pigweed populations from southern Ontario and Washington state have established: (1) that the several resistant populations from the West Montrose area, Waterloo Co., Ontario and one from Washington state, previously reported as Amaranthus retroflexus ...
S. I. WARWICK, S. E. WEAVER
openaire   +1 more source

Relative time of redroot pigweed emergence affects dry matter partitioning

Weed Science, 2001
Abstract The partitioning coefficient is defined as the proportion of new dry matter partitioned among different plant parts. Partitioning coefficients can be used to model plant dry matter accumulation. In 1994 and 1995, field studies were conducted at two locations near Manhattan, KS, to determine the influence of density and relative time of ...
Stevan Z. Knezevic, Richard L. Vanderlip, Michael J. Horak   +2 more
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Redroot Pigweed (Amaranthus retroflexus)

Weed Technology, 1997
“… To the ground, With solemn adoration, down they cast Their crowns, inwove with amaranth and gold. Immortal amaranth, a flower which once In Paradise, fast by the tree of life, Began to bloom.”–John Milton (1608–1676), Paradise LostRedroot pigweed (Amaranthus retroflexus L.), one of the New World's major weeds, was described in 1753 by Carolus ...
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Selectivity of Nitrofen among Rape, Redroot Pigweed, and Green Foxtail

Weed Science, 1971
The selectivity of 2,4-dichlorophenylp-nitrophenyl ether (nitrofen) among rape (Brassica campestrisL., var. Echo) and two weed species, redroot pigweed (Amaranthus retroflexusL.) and green foxtail (Setaria viridis(L.) Beauv.), was determined quantitatively by a replicated dosage-response experiment.
D. Hawton, E. H. Stobbe
openaire   +1 more source