Organização das comunidades infestantes de plantas daninhas na cultura da cana-de-açúcar em agrupamentos-padrão

Ferreira, Rogério; Contato, Eduardo Dollo; Kuva,; Ferraudo, Antônio Sérgio; Alves, Paulo Roberto Arruda; Magário, Fernando Benini; Salgado, Tiago Pereira

doi:10.1590/s0100-83582011000200014

Cited by 9 publications

(8 citation statements)

References 13 publications

(16 reference statements)

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“…Morning glory showed the greatest value of IVI (Figure 2), confirming that weed community presented predominance of this species during the trial period. In a survey conducted in 70 plants, Ferreira et al (2011) found that I. hederifolia, according to IVI was the third species in importance.…”

Section: Resultsmentioning

confidence: 99%

Period prior to interference of morning glory in sugarcane

Piza¹,

Nepomuceno

Alves

2016

Científica

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Sugarcane had great change in its production environment with the adoption of mechanized harvesting, highlighting the increasing importance of morning glory, for which there is no information about its interference in sugarcane cycle. The aim of this study was to determine the period prior to interference (PPI) of a weed community with predominance of Ipomoea hederifolia on sugarcane 'SP81-3250' in sugarcane plant cycle and its effect on technological parameters. Treatments consisted of increasing coexistence periods at the early of the cycle: 0, 0-15, 0-30, 0-45, 0-60, 0-75, 0-90, 0-120, 0-150, 0-180, 0-210, 0-270, 0-330 days after emergency. A randomized block design with four replications was used. Phytosociological analysis of weed community was performed, which confirmed morning glory dominance in the community and PPI obtained was 76 days after emergence, with a level of 5% of acceptable loss. The yield loss of industrialized stems due to morning glory interference was 17.5%. There was no change of sugarcane technological parameters.Additional keywords: competition; Ipomoea hederifolia; periods of interference; Saccharum spp. ResumoA cana-de-açúcar sofreu grande alteração em seu ambiente de produção com a adoção da colheita mecanizada, destacando-se a crescente importância das cordas-de-viola, para as quais ainda não há informações sobre a interferência que podem exercer no ciclo de cana-planta. O objetivo deste trabalho foi determinar o período anterior à interferência (PAI) de uma comunidade infestante com predominância de Ipomoea hederifolia sobre cana-de-açúcar 'SP81-3250' no ciclo de cana-planta e seus efeitos sobre os parâmetros tecnológi-cos. Os tratamentos experimentais constaram de períodos crescentes de convivência no início do ciclo, a saber: 0, 0-15, 0-30, 0-45, 0-60, 0-75, 0-90, 0-120, 0-150, 0-180, 0-210, 0-270, 0-330 dias após a emergência. Foi utilizado delineamento blocos ao acaso com quatro repetições. Foi realizada análise fitossociológica da comunidade de plantas daninhas, que confirmou a predominância de corda-de-viola na comunidade e o PAI obtido foi de 76 dias após a emergência, com um nível de 5% de perda aceitável. A perda de produtividade de colmos industrializáveis devido à interferência da corda-de-viola foi de 17,5%. Não houve alteração dos parâ-metros tecnológicos da cana-de-açúcar.Palavras-chave adicionais: competição; Ipomoea hederifolia; períodos de interferência; Saccharum spp.

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Section: Resultsmentioning

confidence: 99%

Period prior to interference of morning glory in sugarcane

Piza¹,

Nepomuceno

Alves

2016

Científica

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“…Vitória da Conquista / BA, Brazil (2014). established (Carbonari et al, 2005;Ferreira et al, 2011). This species presented high value among the evaluated parameters, which may be due to its underground breeding structures, which enables growth retaken after some days.…”

Section: Resultsmentioning

confidence: 91%

Phytosociological survey of weed in cassava cultivation in Southwestern Bahia, Brazil

Soares¹,

José²,

Neto³

et al. 2015

Afr. J. Agric. Res.

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Phytosociological surveys are basis for weed management in agricultural crops. We aimed in this study to survey weed within a cassava cultivation field in the city of Vitória da Conquista, Southwestern Bahia, Brazil. The crop was grown for 18 months (from January 2013 to July 2014), with samples at 35, 70 and 105 days after planting (first year cultivation), and at 350, 385 and 420 days after planting (second year cultivation). Sampling was performed according to inventory square method, in which a 0.25 m 2 iron frame is thrown randomly on the cropland. Then, weed within this metal square area are cut at ground level, identified, quantified and afterwards placed into an oven at 65°C during 72 h to obtain dry mass of each species. Evaluated phytosociological parameters were frequency, relative frequency, density, relative density, abundance, relative abundance and importance value index. The main identified families in the survey were Malvaceae, Asteraceae and Poaceae. In total, it was assessed 14 families, 32 genera and 38 species of weeds. The highest importance value index was found for Sida rhombifolia, Cynodon dactylon and Brachiaria plantaginea. Regarding dry mass, Panicum maximum, B. plantaginea and S. rhombifolia had the largest values. It was concluded that weed control methods must focus on species and consider reinfestations in the second crop year.

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“…Some compounds produced by sugarcane can adversely affect weed communities within sugarcane fields [5]. In phytosociological surveys, Kuva et al [6] [7] and Ferriera et al [8] reported differences in weed infestations between areas planted with different sugarcane cultivars. This may occur due to differences in the preservation of some of the ancestors' aggressive characteristics in some cultivars, such as allelopathic potential.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Allelopathic Potential of Sugarcane Leaves and Roots

Hijano¹,

Nepomuceno²,

Cantrell³

et al. 2021

JACEN

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Sugarcane cultivars that are currently planted are the result of genetic improvement focused on increased crop yield. However, this selection and genetic alteration reduced the competitive potential of sugarcane, as well as its allelopathic capabilities. Many members of the Poaceae family are highly allelopathic. Thus, the objective of this study was to characterize the allelopathic potential of two sugarcane cultivars (CTC 2 and IAC 91109) by bioassayguided fractionation, isolation, and identification of significant phytotoxins, including those that are lipophilic. For both leaves and roots, alpha-linolenic and linoleic acid were found to be the most phytotoxic compounds found with this approach. Both compounds were phytotoxic when applied in soil and caused light-independent cellular leakage of treated cucumber cotyledon discs. We conclude that some of the phytotoxic effects of sugarcane residues in soil are due to the combined action of alpha-linolenic and linoleic acid.

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Organização das comunidades infestantes de plantas daninhas na cultura da cana-de-açúcar em agrupamentos-padrão

Cited by 9 publications

References 13 publications

Period prior to interference of morning glory in sugarcane

Period prior to interference of morning glory in sugarcane

Phytosociological survey of weed in cassava cultivation in Southwestern Bahia, Brazil

Characterization of the Allelopathic Potential of Sugarcane Leaves and Roots

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