Interference of Sorghum sudanense and Eleucine indica in the soybean and corn cultivation

Rizzardi,; Wandscheer, Alana Cristina Dorneles

doi:10.1590/s0100-83582014000100003

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…This fact was also reported by Christoffoleti and Victoria Filho (1996) when studying maize competition with pigweed. Rizzardi and Wandscheer (2014) observed that the species that demonstrate greater competitiveness suffer more from intraspecific competition than from interspecific competition, as plants with greater competitive capacity are usually harmed due to lack of space or environmental resources.…”

Section: Resultsmentioning

confidence: 99%

Morphological responses of maize hybrids under competition with hairy beggarticks

et al. 2023

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The study of competitive interactions between crops and weeds can be an important tool in integrated weed management. The objective of this work was to evaluate the competitive ability of maize hybrids in the presence of hairy beggarticks, testing different proportions of plants in the associations. For maize hybrids (Dekalb 230 PRO3, Pioneer 30F53 VYH, Brevant 2B433 PW, and Syngenta 505 VIP3) and for hairy beggarticks, the final density was 20 individuals pot-1, which was determined in preliminary experiments. Experiments were carried out on a substitutive series, on different combinations of the species, varying the relative proportions (100:0, 75:25, 50:50, 25:75, and 0:100%). The analysis of species competitiveness was performed using diagrams applied to the substitutive experiments and relative competitiveness indices. The maize hybrids showed less loss when reducing the morphological variables of the hairy beggarticks and demonstrated superiority in competitive ability in relation to the weed. Competition occurred between maize hybrids in the presence of hairy beggarticks, being negatively affected, regardless of the proportion of plants, causing reductions in plant height, stem diameter, leaf area, and dry mass. An average reduction of 10% and 86% of the MS of maize hybrids and weed was observed, respectively, when comparing the absence of competition with any associated densities, intraspecific competition being more harmful than interspecific. Maize hybrids and hairy beggarticks compete for the same environmental resources, with the crop being more competitive than the competitor.

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Section: Resultsmentioning

confidence: 99%

Morphological responses of maize hybrids under competition with hairy beggarticks

et al. 2023

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“…A recent study by Ma et al (2015) demonstrated that goosegrass at a density of 4 plants m −1 per row significantly reduced cotton yields by 20 to 27%. Rizzardi and Wandscheer (2014) documented that E. indica was more competitive than Sorghum sudanense in mixed infestations with corn but in contrast S. sudanense was more competitive than E. indica, in mixed infestations with soybean.…”

Section: Abstrakmentioning

confidence: 99%

Potential of Oil Palm Frond Residues in Combination with S-Metolachlor for the Inhibition of Selected Herbicide-Resistant Biotypes of Goosegrass Emergence and Seedling Growth

Chuah

Lim

Ismail³

2018

JSM

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Heavy reliance on herbicides for goosegrass (Eleusine indica Gaertn.) control has led to the development of paraquat, glufosinate, fluazifop and/or glyphosate resistance in goosegrass. This study aimed to evaluate the efficacy of preemergence herbicide, S-metolachlor-treated oil palm frond powder on inhibition of resistant biotypes of goosegrass under glasshouse and field conditions. The oil palm frond (OPF) powder was treated with S-metolachlor at its suboptimal rate and applied as mulch. The herbicide-resistant goosegrass plants were found to be more inhibited when treated with S-metolachlor-treated OPF mulch at the rate of 12 g ai ha-1 S-metolachlor + 1.5 t ha-1 OPF (with the exception of the glufosinate-resistant googegrass biotype in the sandy loam soil) compared to the growth of the resistant biotypes in silty loam soil under glasshouse conditions. Field experiments in an ambarella (Spondias dulcis L.) farm further showed that OPF-treated with S-metolachlor mulch at the rate of 32.0 g ai ha-1 S-metolachlor + 4.0 t ha-1 OPF provided great suppression of glyphosate-resistant biotypes of goosegrass with more than 85% reduction of weed density and biomass, respectively. These results suggested that the residue of OPF have the potential to reduce the application rate of S-metolachor without compromising on the excellent control obtained in combating these herbicide-resistant biotypes of goosegrass.

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The long-term effects of tillage practice and phosphorus fertilization on the distribution and morphology of corn root

Mollier

Ziadi

et al. 2016

Plant Soil

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Background and aims Relevant soil properties and nutrient distributions influencing crop root growth might be different under no-till (NT) and mouldboard plough (MP) management. The possible different root systems within different managements might have key impact on crop nutrient uptake and consequently crop production. Our objective was to assess the long-term combined effects of tillage and phosphorus (P) fertilization on corn (Zea mays L.) root distribution and morphology. Methods Corn root and soil samples were collected during the silking stage at five depths (0-5, 5-10, 10-20, 20-30 and 30-40 cm) and three horizontal distances perpendicular to the corn row (5, 15 and 25 cm) under MP and NT with three P fertilizations (0, 17.5, and 35 kg P ha −1 ) for a long-term (22 years) experiment in eastern Canada. Root morphology and soil properties were determined. Results NT practice decreased corn root biomass by −26 % compared to MP, mainly by decreasing the primary and secondary roots. Additionally, corn roots in NT tend to be more expansive on the surface layer with higher root length and surface densities for the depth of 0-5 cm at two sampling distances of 15 and 25 cm. The 35 kg P ha −1 rate increased the root biomass by 26 and 41 % compared to the 0 and 17.5 kg P ha −1 rates. Conclusions No-tillage practice and low rates of P fertilization reduce corn roots. This is probably caused by the weed competition in NT and the continued downward P status with low P rates over 22 years. Abbreviations MP Mouldboard plough NTNo-till 0P, 0.5P and 1P P fertilization rates of 0, 17.5 and 35 kg P ha −1 every two years RMD Root mass density RSD Root surface density RLD Root length density Plant Soil

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Interference of Sorghum sudanense and Eleucine indica in the soybean and corn cultivation

Cited by 4 publications

References 21 publications

Morphological responses of maize hybrids under competition with hairy beggarticks

Morphological responses of maize hybrids under competition with hairy beggarticks

Potential of Oil Palm Frond Residues in Combination with S-Metolachlor for the Inhibition of Selected Herbicide-Resistant Biotypes of Goosegrass Emergence and Seedling Growth

The long-term effects of tillage practice and phosphorus fertilization on the distribution and morphology of corn root

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