scholarly journals Cross-Resistance to Herbicides in Annual Ryegrass (Lolium rigidum)

1991 ◽  
Vol 97 (3) ◽  
pp. 1026-1034 ◽  
Author(s):  
Joseph A. M. Holtum ◽  
John M. Matthews ◽  
Rainer E. Häusler ◽  
David R. Liljegren ◽  
Stephen B. Powles
Keyword(s):  
Cross Resistance ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Resistance To Herbicides

scholarly journals Cross-Resistance to Herbicides in Annual Ryegrass (Lolium rigidum)

1990 ◽  
Vol 94 (3) ◽  
pp. 1180-1186 ◽  
Author(s):  
John M. Matthews ◽  
Joseph A. M. Holtum ◽  
David R. Liljegren ◽  
Barbara Furness ◽  
Stephen B. Powles
Keyword(s):  
Cross Resistance ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Resistance To Herbicides

scholarly journals Cross-Resistance to Herbicides in Annual Ryegrass (Lolium rigidum)

1991 ◽  
Vol 97 (3) ◽  
pp. 1035-1043 ◽  
Author(s):  
Rainer E. Häusler ◽  
Joseph A. M. Holtum ◽  
Stephen B. Powles
Keyword(s):  
Cross Resistance ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Resistance To Herbicides

scholarly journals Cross-Resistance to Herbicides in Annual Ryegrass (Lolium rigidum)

1991 ◽  
Vol 95 (4) ◽  
pp. 1036-1043 ◽  
Author(s):  
John T. Christopher ◽  
Stephen B. Powles ◽  
David R. Liljegren ◽  
Joseph A. M. Holtum
Keyword(s):  
Cross Resistance ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Resistance To Herbicides

The occurrence of herbicide cross-resistance in a population of annual ryegrass, Lolium rigidum, resistant to diclofop-methyl

1986 ◽  
Vol 37 (2) ◽  
pp. 149 ◽  
Author(s):  
I Heap ◽  
R Knight
Keyword(s):  
Cross Resistance ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Leaf Stage ◽  
Two Populations

A population of L. rigidum, which is known to have developed resistance to one of the diphenyl-ethertype of herbicides, diclofop-methyl, was tested for cross-resistance to three other herbicides of the same type, namely fluazifop-butyl, oxyfluorfen and the experimental herbicide CGA 82725. The population was also tested for cross-resistance to two sulfonylurea-type herbicides - chlorsulfuron and the experimental herbicide DPX-T6376. A population susceptible to diclofop-methyl was used as the controls in the tests. The two populations were treated with various rates of the herbicides during germination and at the two-leaf stage. The results show that the diclofop-methyl-resistant biotype was cross-resistant to fluazifop-butyl, CGA 82725, chlorsulfuron and DPX-T6376 but not to oxyfluorfen.

Herbicide Cross-Resistance in Annual Ryegrass(Lolium rigidum Gaud)

1990 ◽  
pp. 394-406 ◽  
Author(s):  
S. B. Powles ◽  
J. A. M. Holtum ◽  
J. M. Matthews ◽  
D. R. Liljegren
Keyword(s):  
Cross Resistance ◽  
Annual Ryegrass ◽  
Lolium Rigidum

Variation in herbicide cross-resistance among populations of annual ryegrass (Lolium rigidum) resistant to diclofop-methyl

1990 ◽  
Vol 41 (1) ◽  
pp. 121 ◽  
Author(s):  
IM Heap ◽  
R Knight
Keyword(s):  
The Other ◽  
Cross Resistance ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Simple Manner ◽  
Spray Treatment

A population of annual ryegrass (Lolium rigidurn), known to be susceptible to diclofop-methyl, and eleven populations known to be resistant to the herbicide, were evaluated for their cross-resistance to fluazifop-butyl, haloxyfop-methyl, sethoxydim, chlorsulfuron, glyphosate and propham, applied postemergence as a spray treatment. None of the populations were cross-resistant to glyphosate or propham. All the populations showed some level of cross-resistance to the other herbicides, but there was considerable variation between populations in this resistance. The variation could not be related in any simple manner to the origin of the populations in Australia, nor to their past histories of herbicide applications. The results indicate the complexity that will be faced in resolving the biochemistry and genetics of the phenomenon and the formulation of advice to farmers.

Alleviation of dormancy in annual ryegrass (Lolium rigidum) seeds by hydration and after-ripening

Weed Science ◽  
2004 ◽  
Vol 52 (6) ◽  
pp. 968-975 ◽  
Author(s):  
Robert S. Gallagher ◽  
Kathryn J. Steadman ◽  
Andrew D. Crawford
Keyword(s):  
Seed Germination ◽  
Relative Humidity ◽  
Germination Rate ◽  
Dormancy Release ◽  
Annual Ryegrass ◽  
Dormant Seed ◽  
Lolium Rigidum ◽  
Time Model ◽  
Treatment Regimens ◽  
Two Populations

The effect of hydration (priming) treatment on dormancy release in annual ryegrass seeds from two populations was investigated. Hydration duration, number, and timing with respect to after-ripening were compared in an experiment involving 15 treatment regimens for 12 wk. Seeds were hydrated at 100% relative humidity for 0, 2, or 10 d at Weeks 1, 6, or 12 of after-ripening. Dormancy status was assessed after each hydration treatment by measuring seed germination at 12-hourly alternating 25/15 C (light/dark) periods using seeds directly from the hydration treatment and seeds subjected to 4 d postpriming desiccation. Seeds exposed to one or more hydration events during the 12 wk were less dormant than seeds that remained dry throughout after-ripening. The longer hydration of 10 d promoted greater dormancy loss than either a 2-d hydration or no hydration. For the seed lot that was most dormant at the start of the experiment, two or three rather than one hydration event or a hydration event earlier rather than later during after-ripening promoted greater dormancy release. These effects were not significant for the less-dormant seed lot. For both seed lots, the effect of a single hydration for 2 d at Week 1 or 6 of after-ripening was not manifested until the test at Week 12 of the experiment, suggesting that the hydration events alter the rate of dormancy release during subsequent after-ripening. A hydrothermal priming time model, usually used for modeling the effect of priming on germination rate of nondormant seeds, was successfully applied to dormancy release resulting from the hydration treatments.

Annual ryegrass (Lolium rigidum) seed survival and digestibility in cattle and sheep

2002 ◽  
Vol 42 (2) ◽  
pp. 111 ◽  
Author(s):  
R. Stanton ◽  
J. Piltz ◽  
J. Pratley ◽  
A. Kaiser ◽  
D. Hudson ◽  
...  
Keyword(s):  
Dry Matter ◽  
Control Diet ◽  
Basal Diet ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Seed Survival ◽  
Dry Matter Digestibility ◽  
Cattle And Sheep

A trial was conducted to investigate the survival and digestibility of annual ryegrass (ARG) seed (Lolium rigidum L.) eaten by sheep and cattle. Sheep (n= 8) and cattle (n = 8) were fed a basal diet containing 1:1 lucerne chaff:oaten chaff with (ARG) or without (control) the inclusion of 20% total dry matter of annual ryegrass seed in a changeover design. Intake was restricted to 17 g/kg liveweight. Digestibility of the control diet was lower (P<0.01) for sheep than cattle. Annual ryegrass seed was present (P<0.01) in the faeces of both sheep and cattle within 24 h of first ingestion. Some 10.8 and 32.8% of seed ingested was excreted by sheep and cattle respectively, with 3.9% (sheep) and 11.9% (cattle) remaining germinable. Annual ryegrass seed continued to be excreted by both sheep and cattle up to 5 days after removal from the diet. Dry matter digestibility of the annual ryegrass diet was 53% in cattle.

Sign in / Sign up

Export Citation Format

Share Document