scholarly journals Avena sterilis L. (wild oat) response to Clodinafop-propargyl in wheat crops in Morocco

2019 ◽  
Vol 4 (6) ◽  
pp. 1811-1813
Author(s):  
Hajjaj B ◽  
El Oualkadi A
Keyword(s):  
Wild Oat ◽  
Avena Sterilis ◽  
Clodinafop Propargyl

scholarly journals Differences in Germination of ACCase-Resistant Biotypes Containing Isoleucine-1781-Leucine Mutation and Susceptible Biotypes of Wild Oat (Avena sterilis ssp. ludoviciana)

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2350
Author(s):  
Fatemeh Benakashani ◽  
Jose L. Gonzalez-Andujar ◽  
Elias Soltani
Keyword(s):  
Seed Germination ◽  
Soil Water ◽  
Management Practices ◽  
Integrated Management ◽  
Wild Oat ◽  
Avena Sterilis ◽  
Germination Characteristics ◽  
Cereal Fields ◽  
The Right ◽  
Clodinafop Propargyl

Herbicide resistance can affect seed germination and the optimal conditions required for seed germination, which in turn may impose a fitness cost in resistant populations. Winter wild oat [Avena sterilis L. ssp. ludoviciana (Durieu) Gillet and Magne] is a serious weed in cereal fields. In this study, the molecular basis of resistance to an ACCase herbicide, clodinafop-propargyl, in four A. ludoviciana biotypes was assessed. Germination differences between susceptible (S) and ACCase-resistant biotypes (WR1, WR2, WR3, WR4) and the effect of Isoleucine-1781-Leucine mutation on germination were also investigated through germination models. The results indicated that WR1 and WR4 were very highly resistant (RI > 214.22) to clodinafop-propargyl-contained Isoleucine to Leucine amino acid substitution. However, Isoleucine-1781-Leucine mutation was not detected in other very highly resistant biotypes. Germination studies indicated that resistant biotypes (in particular WR1 and WR4) had higher base water potentials than the susceptible one. This shows that resistant biotypes need more soil water to initiate their germination. However, the hydrotime constant for germination was higher in resistant biotypes than in the susceptible one in most cases, showing faster germination in susceptible biotypes. ACCase-resistant biotypes containing the Isoleucine-1781-Leucine mutation had lower seed weight but used more seed reserve to produce seedlings. Hence, integrated management practices such as stale seedbed and implementing it at the right time could be used to take advantage of the differential soil water requirement and relatively late germination characteristics of ACCase-resistant biotypes.

Isozyme variation in germplasm accessions of the wild oat Avena sterilis L.

1993 ◽  
Vol 86 (1) ◽  
pp. 54-64 ◽  
Author(s):  
T. D. Phillips ◽  
J. P. Murphy ◽  
M. M. Goodman
Keyword(s):  
Isozyme Variation ◽  
Wild Oat ◽  
Avena Sterilis ◽  
Germplasm Accessions

Extreme drought alters progeny dispersal unit properties of winter wild oat (Avena sterilis L.)

Planta ◽  
2020 ◽  
Vol 252 (5) ◽  
Author(s):  
Buzi Raviv ◽  
Janardan Khadka ◽  
Bupur Swetha ◽  
Jeevan R. Singiri ◽  
Rohith Grandhi ◽  
...  
Keyword(s):  
Extreme Drought ◽  
Wild Oat ◽  
Avena Sterilis ◽  
Dispersal Unit

Wild Oat (Avena fatua) andAvena sterilisMorphological Characteristics and Response to Herbicides

Weed Science ◽  
1984 ◽  
Vol 32 (3) ◽  
pp. 353-359 ◽  
Author(s):  
Carol N. Somody ◽  
John D. Nalewaja ◽  
Stephen D. Miller
Keyword(s):  
United States ◽  
Surface Area ◽  
Southern California ◽  
Leaf Surface ◽  
The United States ◽  
Avena Fatua ◽  
Propanoic Acid ◽  
Wild Oat ◽  
Avena Sterilis ◽  
Leaf Surface Area

Wild oat (Avena fatuaL. ♯3AVEFA) andAvena sterilisL. ♯ AVEST accessions from the United States were screened for tolerance to diallate [S-(2,3-dichloroallyl) diisopropylthiocarbamate], triallate [S-(2,3,3-trichloroallyl) diisopropylthiocarbamate], barban (4-chloro-2-butynylm-chlorocarbanilate), diclofop {2-[4-(2,4-dichlorophenoxy) phenoxy] propanoic acid}, difenzoquat (1,2-dimethyl-3,5-diphenyl-1H-pyrazolium), flamprop [N-benzoyl-N-(3-chloro-4-fluorophenyl)-DL-alanine], and MSMA (monosodium methanearsonate). Some accessions were tolerant to more than one herbicide but none were tolerant to all herbicides. Tolerance to a herbicide was not restricted to certain areas of origin of the accessions, and tolerant accessions occurred even in locations that had not been treated previously with the herbicide. In general, accessions from Southern California and Arizona were shorter, produced more tillers, and required the least number of days to panicle emergence. However, accessions from within individual areas were nearly as variable in these characteristics as the entire 1200 accessions. Tolerance of accessions to flamprop, difenzoquat, MSMA, and diclofop was not due to low leaf surface area, since the tolerant accessions usually had the most leaf surface area. All the accessions tolerant to difenzoquat, MSMA, and flamprop, and three of the four accessions tolerant to diclofop, tillered less than the susceptible accessions.

Resistance to Aryloxyphenoxypropionate Herbicides in Two Wild Oat Species (Avena fatuaandAvena sterilisssp.ludoviciana)

Weed Science ◽  
1992 ◽  
Vol 40 (4) ◽  
pp. 599-605 ◽  
Author(s):  
Ali M. Mansooji ◽  
Joseph A. Holtum ◽  
Peter Boutsalis ◽  
John M. Matthews ◽  
Stephen B. Powles
Keyword(s):  
Methyl Ester ◽  
Western Australia ◽  
South Australia ◽  
Avena Fatua ◽  
Wild Oat ◽  
Avena Sterilis ◽  
Susceptible Control ◽  
Low Levels ◽  
Marked Resistance

Resistance to the methyl ester of diclofop, an aryloxyphenoxypropionate graminicide, was shown for a wild oat (Avena fatua) population from Western Australia, and marked resistance to a range of aryloxyphenoxypropionate and cyclohexanedione graminicides was detected in a winter wild oat (Avena sterilisssp.ludoviciana) population from South Australia. TheA. sterilisbiotype exhibited high levels of resistance to the aryloxyphenoxypropionate herbicides diclofop, fluazifop, haloxyfop, fenoxaprop, quizalofop, propaquizafop, and quinfurop and low levels of resistance to the cyclohexanedione herbicides sethoxydim, tralkoxydim, and cycloxydim. Ratios of LD50values for responses of resistant and susceptibleA. sterilisto the aryloxyphenoxypropionate herbicides were between 20 for propaquizafop and > 1,000 for fluazifop, and were between 2.5 and 3 for the cyclohexanedione herbicides. The LD50value for diclofop for theA. fatuabiotype was 442 g ai ha-1which was 2.7-fold that of a susceptible control. Thirty-three percent of the plants survived at the registered rate of application.

Control of wild oat in the year of smooth bromegrass establishment and its effect on the yield and quality of subsequent seed crops

1999 ◽  
Vol 79 (3) ◽  
pp. 447-453 ◽  
Author(s):  
A. L. Darwent ◽  
J. R. Moyer
Keyword(s):  
Avena Fatua ◽  
Visual Control ◽  
Bromus Inermis ◽  
Wild Oat ◽  
Smooth Bromegrass ◽  
Yield And Quality ◽  
Herbicide Treatments ◽  
The Mean ◽  
Seed Yields ◽  
Clodinafop Propargyl

Wild oat (Avena fatua L.) control from three graminicides, clodinafop-propargyl, fenoxaprop-p-ethyl and tralkoxydim, in seedling stands of smooth bromegrass (Bromus inermis L.) seeded alone or with spring wheat (Triticum aestivum L.) was studied in 1991, 1992 and 1993 at Beaverlodge, Alberta. Seed yield and quality were measured for 2 yr after each year of establishment. In the year of establishment, clodinafop-propargyl at 60 g ha–1 consistently provided ≥80% visual control of wild oat growing in smooth bromegrass seeded with wheat, while the mean probability of similar applications of fenoxaprop-p-ethyl at 92 g ha−1 and tralkoxydim at 250 g ha−1 to provide ≥80% visual control of wild oat, averaged over the years of establishment, was 0.91 and 0.92, respectively. Without the wheat companion crop, the mean probability of clodinafop-propargyl to provide ≥80% visual control of wild oat, averaged over establishment years, remained above 0.90, but that for fenoxaprop-p-ethyl and tralkoxydim was reduced to 0.36 and 0.50, respectively. The efficacy of the three graminicides to control wild oat was reduced by tank mixing with bromoxynil plus MCPA, thifensulfuron methyl plus MCPA, or MCPA alone. Establishment with wheat had a major detrimental impact on smooth bromegrass seed yields harvested 1 and 2 yr after each establishment year. Smooth bromegrass seed yields harvested 1 yr following the year of establishment were three times greater where smooth bromegrass was seeded alone as compared with being seeded with wheat. Seed yields harvested 2 yr after the year of establishment followed a similar trend, but the differences were smaller. Herbicide treatments had no effect on either first or second smooth bromegrass seed yields. Wild oat dockage was present only in the first smooth bromegrass seed crop and was approximately three times greater following establishment with wheat than following establishment alone. Percent wild oat dockage was less from plots where herbicides had been applied than from weedy check plots. Differences in percent dockage occurred among herbicide treatments but were small. Key words: Smooth bromegrass, Bromus inermis, wild oat, Avena fatua, graminicides, tank mixtures

Competition between ACCase-Inhibitor Resistant and Susceptible Sterile Wild Oat (Avena sterilis) Biotypes

Weed Science ◽  
2013 ◽  
Vol 61 (1) ◽  
pp. 26-31 ◽  
Author(s):  
Ilias S. Travlos
Keyword(s):  
Seed Germination ◽  
Plant Height ◽  
Competitive Ability ◽  
Plant Biomass ◽  
Wild Oat ◽  
Seedling Vigor ◽  
Acetyl Coa Carboxylase ◽  
Replacement Series ◽  
Avena Sterilis ◽  
Canopy Area

Studies were conducted to determine the growth, fecundity, and competitive ability of an acetyl-CoA carboxylase (ACCase)–inhibitor resistant (R) sterile wild oat biotype compared with a susceptible (S) biotype. Seed germination studies indicated that there were no differences in seed germination and seedling vigor between R and S biotypes at any temperature regime. R and S biotypes were grown under noncompetitive and competitive arrangement in the greenhouse. Under noncompetitive greenhouse conditions, growth of the R biotype was similar to that of the S biotype on the basis of plant height, canopy area, and plant biomass. Seed production and weight of R and S plants were also at the same levels. Furthermore, relative competitiveness among the R and S sterile wild oat biotypes was investigated by means of replacement series experiments. The R and S biotypes were compared under seven mixture proportions (6 : 0, 5 : 1, 4 : 2, 3 : 3, 2 : 4, 1 : 5, and 0 : 6). No significant differences in competitive ability were observed between R and S biotypes on the basis of plant height, canopy area, or plant biomass. In most cases, relative crowding coefficient (RCC) values at 20, 60, and 100 d after transplanting (DAT) were close to one, indicating equal competitiveness between the R and S biotypes of wild oat used in this competitive study. However, in some cases, the RCC value was 1.31 for plant height, evident of a slight competitive advantage for the R biotype at 100 DAT. In general, ACCase-inhibitor R and S sterile wild oat biotypes were equally competitive, clearly without any growth penalty for R plants in either noncompetitive or competitive conditions.

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