Chemical control of wild-oat (Avena sterilis L.) and other weeds in wheat (Triticum durum Desf.) in Jordan

Qasem, J. R.

doi:10.1016/j.cropro.2006.11.006

Cited by 14 publications

(10 citation statements)

References 13 publications

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“…Wild oat (weedy Avena spp) is a problematic and cosmopolitan weed in >20 crops across 55 countries and can cause an enormous yield loss in winter crops [1,2]. Two wild oat species [i.e., Avena fatua L. (wild oats) and A. ludoviciana Durieu (sterile oats)] are the important weeds of this genus [3][4][5][6][7]. A. fatua and A. ludoviciana are very similar in morphological features and are difficult to differentiate at the vegetative stage; however, they can be easily differentiated at maturity.…”

Section: Introductionmentioning

confidence: 99%

Influence of soil moisture levels on the growth and reproductive behaviour of Avena fatua and Avena ludoviciana

et al. 2020

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Adaptation of weeds to water stress could result in the broader distribution, and make weed control task increasingly difficult. Therefore, a clear understanding of the biology of weeds under water stress could assist in the development of sustainable weed management strategies. Avena fatua (wild oat) and A. ludoviciana (sterile oat) are problematic weeds in Australian winter crops. The objectives of this study were to determine the growth and reproductive behaviour of A. fatua and A. ludoviciana at different soil moisture levels [20, 40, 60, 80, and 100% water holding capacity (WHC)]. Results revealed that A. fatua did not survive and failed to produce seeds at 20 and 40% WHC. However, A. ludoviciana survived at 40% WHC and produced 54 seeds plant-1. A. fatua produced a higher number of seeds per plant than A. ludoviciana at 80 (474 vs 406 seeds plant-1) and 100% WHC (480 vs 417 seeds plant-1). Seed production for both species remained similar at 80 and 100% WHC; however, higher than 60% WHC. Seed production of A. fatua and A. ludoviciana was 235 and 282 seeds plant-1 , respectively, at 60% WHC. The 60% WHC reduced seed production of A. fatua and A. ludoviciana by 51 and 32% respectively, compared to 100% WHC. The plant height, leaf weight, stem weight, and root weight per plant of A. fatua at 60% WHC reduced by 45, 27, 32, and 59%, respectively, as compared with 100% WHC. Similarly, the plant height, leaf weight, stem weight, and root weight per plant of A. ludoviciana at 60% WHC reduced by 45, 35, 47 and 76%, respectively, as compared with 100% WHC. Results indicate that A. ludoviciana can survive and produce seeds at 40% of WHC, indicating the adaptation of the species to dryland conditions. The results also suggest that A. ludoviciana is likely to be robust under water stress conditions, potentially reducing crop yield. The ability of A. fatua and A. ludoviciana to produce seeds under water-stressed conditions (60% WHC) necessitates integrated weed management strategies that suppress these weeds whilst taking into account the efficient utilization of stored moisture for winter crops.

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Section: Introductionmentioning

confidence: 99%

Influence of soil moisture levels on the growth and reproductive behaviour of Avena fatua and Avena ludoviciana

et al. 2020

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“…Wild oats represent a serious economic threat to crop yields because of their high competitiveness, staggered germination, crop mimicry, high degree of phenotypic variation, substantial reproductive output, and the ability of seed to persist in the soil seedbank (Holm et al 1977;Owen and Powles 2009;. Despite large efforts to control these weeds through herbicide use and various technological advancements, wild oat populations continue to persist, remaining the most abundant, competitive, and noxious weeds in many areas (Qasem 2007). In particular, sterile wild oat is the most widespread and harmful weed in winter cereals in Greece and in other Mediterranean countries (Damanakis 1983;Travlos et al 2008Travlos et al , 2011 significantly reducing crop yield and contaminating commercial seed.…”

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confidence: 99%

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

Travlos¹

2013

Weed sci.

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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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“…Both grassy and broad-leaved weeds infest wheat (Siddiqui & Bajwa, 2001). The yield reduction due to weeds in wheat may be up to 80%, depending upon weed type, density, timing of emergence, wheat density, wheat cultivar and soil and environmental factors (Qasem, 2007). Phalaris minor Retz.…”

Section: Introductionmentioning

confidence: 99%

Herbicidal activity of culture filtrates ofTrichodermaspp. against two problematic weeds of wheat

Javaid

Ali

2011

Natural Product Research

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The herbicidal potential of culture filtrates of four Trichoderma spp., namely Trichoderma harzianum Rifai, Trichoderma pseudokoningii Rifai, Trichoderma reesei Simmons and Trichoderma viride Pers., was evaluated against two problematic weeds of wheat, Phalaris minor L. and Rumex dentatus L. In laboratory bioassays, generally, metabolites of all four Trichoderma species significantly reduced various root and shoot growth parameters of the two target weed species. The original concentrations of the culture filtrates of all Trichoderma spp., except T. harzianum, significantly reduced various parameters of root and shoot growth of wheat seedlings. In a foliar spray bioassay, the culture filtrates of all four Trichoderma spp. significantly diminished root and shoot biomass of R. dentatus. The effect of these filtrates on the shoot growth of P. minor and wheat was not significant. Culture filtrates of the four Trichoderma species were successively extracted with butanol, n-hexane, chloroform and ethyl acetate. In detached leaf injection bioassays, n-hexane fractions (3 mg mL(-1)) of T. pseudokoningii, T. reesei and T. viride, and ethyl acetate fractions of T. horzianum and T. pseudokoningii were found to be toxic against R. dentatus. This study concludes that the culture filtrates of Trichoderma species have herbicidal potential in the control of R. dentatus.

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Chemical control of wild-oat (Avena sterilis L.) and other weeds in wheat (Triticum durum Desf.) in Jordan

Cited by 14 publications

References 13 publications

Influence of soil moisture levels on the growth and reproductive behaviour of Avena fatua and Avena ludoviciana

Influence of soil moisture levels on the growth and reproductive behaviour of Avena fatua and Avena ludoviciana

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

Herbicidal activity of culture filtrates ofTrichodermaspp. against two problematic weeds of wheat

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