Weed control via intercropping with gliricidia: I. cotton crop

Silva, P.S.L.; Silva, J.C.V.; Carvalho, Luiz Paulo de; Silva, K.M.B.; Freitas, Francisco Cláudio Lopes de

doi:10.1590/s0100-83582009000100013

Cited by 12 publications

(12 citation statements)

References 22 publications

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“…At least 15 toxic substances were identified in the above-ground part of gliricidia that could have allelopathic action (Ramamoothy & Paliwal, 1993). Although in the present work intercropping with gliricidia did not significantly reduce weed growth, such a reduction occurred when cotton was intercropped with gliricidia (Silva et al, 2009a). …”

Section: Resultscontrasting

confidence: 71%

Weed control in corn via intercropping with gliricidia sown by broadcasting

Oliveira¹,

Silva

Albuquerque

et al. 2011

Planta daninha

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There has been interest in reducing the use of herbicides for weed control in order to decrease environmental degradation problems. The objective of this study was to evaluate the effects of gliricidia planting density sown by broadcasting and intercopping on green ear and corn grain yield as well as on weed control. A randomized block design with split-plots and five replicates were adopted. Cultivars AG 1051, BM 2022, and BM 3061, assigned to plots, were submitted to the following treatments: no hoeing, two hoeings (at 20 and 40 days after sowing), and intercropped with gliricidia sown at densities of 10 and 20 seeds m-2. Thirty weed species occurred in the experiment area, with Cucumis anguria as the most frequent ones. Cultivar BM 2022 was the best for the total number of ears (TNE) and number (NMHE) and weight of marketable husked ears. Together with cultivar AG 1051, this cultivar had the highest total weight and marketable unhusked ear weight (MUEW). However, the cultivars did not differ with respect to grain yield (GY). The highest green ear and corn grain yield and weed control percentages were obtained with two hoeings; in MUEW, NMHE and GY, intercropping provided intermediate means in comparison with those obtained in hoed and non-hoed plots, indicating that gliricidia was partially beneficial to corn. Increased gliricidia seeding density heightened the benefits to corn (TNE and MUEW). The lack of hoeing produced the poorest green ear and grain yields.

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Section: Resultscontrasting

confidence: 71%

Weed control in corn via intercropping with gliricidia sown by broadcasting

Oliveira¹,

Silva

Albuquerque

et al. 2011

Planta daninha

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“…These results suggest that intercropping with gliricidia deserves to be studied in further detail with respect to its role in weed control. Incidentally, a similar observation was made by other author (Silva et al, 2009a;Silva et al, 2009b).…”

Section: Resultssupporting

confidence: 87%

“…The use of G. sepium branches as soil mulch did not have an allelopathic effect on corn and bean, but significantly decreased the population of some weed species (Obando, 1987). There have been some recent indications that gliricidia intercropped with cotton (Silva et al, 2009a) or corn (Silva et al, 2009b) can control weeds.…”

Section: Introductionmentioning

confidence: 99%

Influence of corn sowing density and gliricidia intercropping on weed control

et al. 2010

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-There is interest in the identification of the best seeding density for new corn hybrids and on reduced use of herbicides for weed control. The objective of this study was to evaluate the effects of seeding density (30, 50, 70, and 90 thousand plants ha -1 ) and weed control on green ear yield and grain yield in corn cultivar AG 1051. A completely randomized block design was adopted with split-plots (seeding densities assigned to plots) and ten replicates. Weed control was achieved by means of two hoeings and by planting corn intercropped with gliricidia (between corn rows, in pits spaced 0.3 m apart). A "no weeding" treatment was included as well. Increased seeding density increased the total number and weight of marketable green ears and decreased the biomass of both weeds and gliricidia. In non-weeded, intercropped and hoed plots, the maximum grain yield values achieved as seeding density increased were 7,881, 7,021, and 9,213 kg ha -1 , respectively, obtained with populations of 67 thousand, 74 thousand, and 67 thousand plants per hectare, respectively. Intercropping did not control weeds (26 species) and provided weed growth, green ear yield, and grain yield (at the lowest densities) similar to those obtained without hoeing, except for total number of green ears, in which no influence of weed control was observed. At densities of 70 thousand and 90 thousand plants per hectare, grain yield with two hoeings was not different from yield values obtained without weeding or in the treatment intercropped with gliricidia, respectively, indicating that increased corn seeding density as well as gliricidiamay help to control weeds.

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“…The state of Mato Grosso is the greatest domestic producer, with an increment of 57.5% in planted area (IBGE, 2015). The crop has great potential and versatility in generating raw material for the manufacturing of a number of consumption products, besides producing the most important textile fiber at a worldwide level (Silva et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Prohexadione-calcium isolado ou em associação com herbicidas e outros produtos no manejo em pré-colheita do algodão

Inoue

Costa

Mendes³

et al. 2015

RBHerbicidas

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-To maintain the quality of the cotton fiber, as well as to provide great yields on the harvest, some aspects must be taken into account such as the uniformity of the bolls and the defoliation; therefore, the use of herbicides and maturators become indispensable. Thus, the objective of this paper was to evaluate the efficiency of the prohexadione-calcium regarding its isolate application and in association with other products in the uniformity and opening of the cotton bolls, as well as the defoliation effect and regrowth of the crop. For such, a field experiment was carried out in the municipality of Diamantino -MT. The outline adopted was of randomized blocks with four repetitions and thirteen treatments, those being composed of control without application; prohexadione-calcium + ethephon + cyclanilide; prohexadione-calcium + flumicloracpentyl; prohexadione-calcium + diuron + thidiazuron; prohexadione-calcium + pyraflufen-ethyl; prohexadione-calcium; prohexadione-calcium + iharol. The treatments were applied when approximately 85% of the bolls of the crop 975 WS were open. The variables: apple opening, regrowth and defoliation were analyzed at 0, 3, 6, 10 and 15 days after the application (DAA) and, finally, the productivity of seed cotton was determined. Regardless of the dose, the plants that received prohexadione-calcium associated with ethephon + cyclanilide, diuron + thidiazuron and pyraflufen-ethyl presented a greater number of open bolls and greater defoliation. We can conclude that the different chemical treatments did not provide statistical differences regarding the regrowth of cotton before the harvest, at 15 DAA, and that the use of prohexadione-calcium, isolated or in association with other products, regardless of the dose, did not influence in the productivity of the seed cotton. Keywords: defoliation; Gossypium hirsutum L.; maturing; uniformity of the bolls Resumo -Para manter a qualidade da fibra do algodão, bem como proporcionar ótimos rendimentos na colheita, alguns aspectos devem ser levados em consideração como, por exemplo, a uniformidade dos capulhos e a desfolha, desta forma, a utilização de herbicidas e maturadores tornam-se imprescindíveis. Assim, o objetivo deste trabalho foi avaliar a eficiência do prohexadione-calcium quando aplicado isoladamente e em associação com outros produtos, na Rev. Bras. Herb., v.14, n.1, p.21-29, jan./mar. 2015 uniformização e abertura dos capulhos do algodão, assim como o efeito na desfolha e rebrota da cultura. Para tanto, conduziu-se um experimento de campo no município de Diamantino-MT. Adotou-se o delineamento de blocos casualizados, com quatro repetições e treze tratamentos, sendo estes compostos por: testemunha sem aplicação; prohexadione-calcium + ethefon + cyclanilide; prohexadione-calcium + flumiclorac-pentyl; prohexadione-calcium + diuron + thidiazuron; prohexadione-calcium + pyraflufen-ethyl; prohexadione-calcium; prohexadione-calcium + iharol. Os tratamentos foram aplicados quando aproximadamente 85% das maçãs da cultivar 975 WS esta...

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Weed control via intercropping with gliricidia: I. cotton crop

Cited by 12 publications

References 22 publications

Weed control in corn via intercropping with gliricidia sown by broadcasting

Weed control in corn via intercropping with gliricidia sown by broadcasting

Influence of corn sowing density and gliricidia intercropping on weed control

Prohexadione-calcium isolado ou em associação com herbicidas e outros produtos no manejo em pré-colheita do algodão

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