Optimizing Wild Oat (Avena fatua) Control with ICIA 06041

Stevenson, F. Craig; Holm, F.A.; Kirkland, K. E. N. J.

doi:10.1614/0890-037x(2000)014[0608:owoafc]2.0.co;2

Cited by 14 publications

(16 citation statements)

References 17 publications

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“…The results confirm those of previous studies where reducing graminicide rates below those recommended sometimes resulted in reduced wheat yields or economic returns (O'Donovan et al, 2003a, 2003b). Other studies in wheat have reported variable results with reduced herbicide rates in terms of maintaining yields and improving economic returns (Spandl et al, 1997; Stevenson et al, 2000; Stougaard et al, 1997). In general, reduced herbicide rates performed better at relatively low wild oat densities in both barley (Belles et al, 2000; Wille et al, 1998) and wheat (Holm et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Wheat Seeding Rate Influences Herbicide Performance in Wild Oat (Avena fatua L.)

et al. 2006

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Field experiments were conducted at three locations in Alberta for 3 yr to determine if spring wheat (Triticum aestivum L.) seeding rate (75 and 150 kg ha 21 ) influenced the effects of recommended and reduced herbicide rates on wild oat (Avena fatua L.) shoot biomass, wild oat seed in the soil seed bank, and wheat yield and net economic return. Wild oat biomass and seed in the soil seed bank decreased nonlinearly at both seeding rates as herbicide rates increased. The herbicides were more effective in reducing wild oat shoot biomass and seed in the soil seed bank when wheat was seeded at the higher rate. The lowest wheat yields and net economic returns occurred when no herbicides were applied and both variables increased nonlinearly with increasing herbicide rate. In most cases, wheat yield and net economic return were greater at the higher seeding rate. On average, wheat yield improved by 19% and net economic return by 16% when wheat was seeded at the higher rate. The results indicate that seeding wheat at relatively high rates can contribute positively to herbicide performance and result in better wild oat management and higher wheat yields and economic returns. In some cases, there was little difference between applying the herbicides at 75 or 100% of the recommended rate but reducing rates below 75% almost always resulted in higher wild oat shoot biomass and seed, and reduced yields and net economic returns, even at the higher wheat seeding rate.

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Section: Resultsmentioning

confidence: 99%

Wheat Seeding Rate Influences Herbicide Performance in Wild Oat (Avena fatua L.)

et al. 2006

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“…In other study, Belles et al (2000), was found out that maximum wheat yields were obtained when wild oat herbicide, tralkoxydim, was applied at 70 to 85% of the recommended rate. In contrast, reducing the herbicide dose below the recommended rate decreased bread wheat (Triticum aestivum L.) yield by 7% (Stevenson et al, 2000). On the other hand, neither grain yield nor net return was affected when relatively low rates of several graminicides were applied to either barley or wheat (Spandl et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

Integrated effect of seeding rate, herbicide dosage and application timing on durum wheat (Triticum turgidum l. var durum) yield, yield components and wild oat (avena fatua l.) control in south eastern Ethiopia

Haile¹,

Girma²

2010

mejs

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Knowledge of optimal combinations of crop densities, herbicide dose and time of application could improve the effectiveness and net benefit of commonly used herbicides. A study was conducted at two locations in SARC on-station and farmer's field, South Eastern Ethiopia for two years from 2007 to 2008. The experimental design was randomized complete block (RCB) design with split-plot arrangement. Durum wheat (Triticum turgidum) seeding rates (recommended, 25% and 50% plus recommended rate) were arranged in the main plot. Four wild oat (Avena fatua) herbicide, Topik, doses (0, 25, 50 and 100 % of the recommended dose) and three timing of applications (14 DA, 32 DAE and 50 DAE) were used as sub-plot treatments. The treatments were compared to determine their effect on durum wheat yield, yield components wild oat densities and control efficacies. Durum wheat seeding rates significantly influenced grain and biomass yield, spike per unit area and kernel weight. Seeding rate of 225 kg ha-1 produced highest grain yield (3810.4 kg ha-1) while 150 kg ha-1 recorded the lowest. Mean wild oat density count before herbicide application timings varied over the two locations averaging 37 and 87 seedlings m-2. Increasing seed rate by 25 and 50% increased wild oat control efficacy by 16.9 and 21.5% respectively. Spraying the herbicide at later growth stages caused greater wild oat seedling density and reduced wheat yield at both locations. The highest efficacy (94.04%) was obtained in the second time of application (30 DAE) of 1 l lit ha-1. The highest reduction in population density was occurred in 100% herbicide rate. There was a general decline in wild oat density in the early application and as the herbicide dose increased, but the effect of seeding rate varied very slightly. In contrast to the wild oat control efficacy the highest grain yield ha-1 was obtained in the first application date (14 DAE). Durum wheat yield losses in the absence of herbicide application were increased by about 16%. Maximum yield (3870.73 kg ha-1) was obtained at 100% of the herbicide dose very closely followed by 50 and 25% of the recommended rate reducing durum wheat yield only by about 1.6 and 2% respectively. Durum wheat seeding rate, herbicide dosage and application timing had statistically no significant interaction effect.

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“…The cultural or mechanical weed control methods are less effective for wild oat compared to chemical control, which is the most effective for wild oat management [ 58 , 59 ]. The urea family and phenoxypropionates herbicides are considered the most effective chemical control of wild oat.…”

Section: Discussionmentioning

confidence: 99%

The impact of seed burial depths and post-emergence herbicides on seedling emergence and biomass production of wild oat (Avena fatua L.): Implications for management

et al. 2020

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Wheat ( Triticum aestivum L) is among the most important cereal crops widely cultivated in the world. Wild oat ( Avena fatua L.) competes with wheat for moisture, sunlight, space and nutrition. The successful management of weeds requires sound knowledge of their biology and response to different herbicides. This study inferred the impact of different constant temperature regimes and seed burial depths on seedling emergence and biomass production of wild oat. Moreover, the impact of different post-emergence herbicides applied at different growth stages on biomass production of wild oat was tested. The influence of different wild oat-wheat density (WWD) combinations on biomass production of wheat and wild oat was also inferred. Different constant temperature regimes significantly altered seed germination and biomass production of wild oat. The highest seed germination percentage and biomass production were noted under 15°C and 20°C, whereas the lowest values were recorded under 30°C. Similarly, days to start emergence, seedling emergence percentage and biomass production of wild oat was significantly affected by different seed burial depths. The lowest and the highest values of these parameters were observed under 4 and 10 cm depth, respectively. Different post-emergence herbicides and wild oat growth stages significantly altered biomass production. The highest reduction in fresh and dry biomass was recorded with herbicides’ application at 2–4 leaf stage compared with anthesis stage. Clodinofop resulted in higher reduction of fresh biomass, whereas higher reduction in dry biomass was noted with Sulfosulfuron. Seed germination of both species was not affected by different WWD combinations, except for the treatment where no seed was sown of both species. These results indicate that deep burial of seeds could prevent seedling emergence, whereas post-emergence herbicides must be applied at 2–4 leaf stage of wild oat for its effective management.

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Optimizing Wild Oat (Avena fatua) Control with ICIA 0604¹

Cited by 14 publications

References 17 publications

Wheat Seeding Rate Influences Herbicide Performance in Wild Oat (Avena fatua L.)

Wheat Seeding Rate Influences Herbicide Performance in Wild Oat (Avena fatua L.)

Integrated effect of seeding rate, herbicide dosage and application timing on durum wheat (<i>Triticum turgidum</i> l. var durum) yield, yield components and wild oat (avena fatua l.) control in south eastern Ethiopia

The impact of seed burial depths and post-emergence herbicides on seedling emergence and biomass production of wild oat (Avena fatua L.): Implications for management

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