Relative Competitiveness of Goosegrass Biotypes and Soybean Crops

Franco, Jader Job; Agostinetto, Dirceu; Langaro, Ana Cláudia; Perboni, Lais Tessari; Várgas, Leandro

doi:10.1590/1983-21252017v30n201rc

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…This indicates less damage to the crop than to arrow-leaf sida, since the values presented by the weed were very far from the expected, presenting a concave line and a detrimental effect on stature (Figure 1). Franco et al (2017), evaluating the relative competitiveness of goose grass biotypes infesting soybean, observed that plant height presented values similar to or below the hypothetical line, indicating that the competition did not cause damage to the crop.…”

Section: /10mentioning

confidence: 93%

Competitive interaction between soybean cultivars and Sida rhombifolia

Konzen

Galon

Weirich

et al. 2021

Agraria

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The arrow-leaf sida (Sida rhombifolia), in addition to competing with soybeans, which causes productivity losses, is also host to the whitefly, which transmits viruses. The aim was to evaluate the competitive ability of soybean cultivars in the presence of an arrow-leaf sida biotype, with different proportions of plants in the association. The experiments were conducted in a completely randomized design, with four replications. Tested competitors included arrow-leaf sida with the four soybean cultivars in proportions crop:weed of 100:0; 75:25; 50:50; 25:75; and 0:100. Competitiveness analysis was carried out using diagrams applied to replacement series experiments in addition to the relative competitiveness indices. At 50 days after the emergence of the species, the variables height, diameter, leaf area, and dry mass of shoots were evaluated. Competition occurred between soybean cultivars in the presence of arrow-leaf sida, regardless of the plant proportion, causing reductions in all variables evaluated. Interspecific competition causes greater damage to al variables studied than intraspecific competition. There was competition for the same resources between soybean and arrow-leaf sida.

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Section: /10mentioning

confidence: 93%

Competitive interaction between soybean cultivars and Sida rhombifolia

Konzen

Galon

Weirich

et al. 2021

Agraria

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“…On the other hand, crabgrass (Digitaria spp.) (C 4 ), beggarticks (C 3 ), wild poinsettia (C 3 ) and goosegrass (C 4 ) exhibited decrease in HEI, LA and SDW when competing with soybean (Agostinetto et al 2013;Forte et al 2017;Franco et al 2017). Table 1.…”

Section: Resultsmentioning

confidence: 99%

Effect of high temperature and recovery from stress on crop–weed interaction

et al. 2020

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Biotic and abiotic stresses, either individually or in combination, may affect soybean growth and development negatively, besides competitiveness with weeds. This study aimed at evaluating the effect of heat stress and plant recovery on crop-weed interaction by analyzing growth variables. Experiments were set up as replacement series of soybean with slender amaranth. Treatments followed a factorial scheme, which was composed of heat stress [high temperature (38/22 ± 2 °C) against the control (28/22 ± 2 ºC)] and of proportions of soybean and slender amaranth, i.e., 100:0 (pure stand of soybean), 50:50 and 0:100 (pure stand of slender amaranth). After being submitted to high temperatures, plants were analyzed in terms of their recovery from heat stress. Variables under evaluation were height, leaf area and shoot dry weight. Results led to the conclusion that the weed shows more competitiveness than soybean, regardless of the heat stress. Interspecific competition for soybean and intraspecific competition for slender amaranth influence their height, leaf area and shoot dry weight negatively, while high temperature affects slender amaranth positively.

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“…A utilização de herbicidas dentro do cronograma de tratos culturais de uma lavoura é indispensável para garantir altas produtividades, e evitar a competição por recursos como água, luz e nutrientes entre a espécie cultivada e as plantas daninhas que ocupam o mesmo espaço. Essa competição interespecífica traz prejuízos mútuos aos organismos envolvidos, mais evidentes na cultura de interesse econômico, que culmina em redução de produtividade (Franco et al, 2017).…”

Section: Introductionunclassified

Seleção de espécies bioindicadoras de resíduos de flumioxazina e saflufenacil no solo

Jonas

2020

RSD

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Herbicidas com atividade residual têm sido utilizados como estratégia de controle de plantas daninhas no período crítico de competição das culturas. Contudo, é necessário monitorar o comportamento dessas substâncias no solo, visto que podem prejudicar cultivos subsequentes. O bioensaio é um método simples, barato, rápido e altamente sensível para detectar resíduos de herbicidas no solo, até mesmo em baixas concentrações. O objetivo deste trabalho foi selecionar espécies vegetais como bioindicadoras da atividade residual dos herbicidas saflufenacil e flumioxazina no solo. Foram avaliadas as espécies Panicum maximum cv. Tamani, Sorghum bicolor, Crambe abyssinica, Vigna angularis, Cucumis sativus e Beta vulgaris em combinação fatorial com seis doses do herbicida flumioxazina (0; 2,5; 5; 10; 25 e 50 g. ha-1) ou sete doses do herbicida saflufenacil (0; 2,5; 5; 10; 25; 50 e 100 g. ha-1), delineados em blocos ao acaso, com cinco repetições. Para o herbicida saflufenacil as espécies mais sensíveis foram a B. vulgaris, C. abyssinica e C. sativus. Para o herbicida flumioxazina as espécies mais sensíveis foram B. vulgaris e C. abyssinica. Considerando que as espécies adequadas para bioensaios são de fácil cultivo, rápido crescimento, sensíveis em baixas doses e de fácil visualização dos sintomas de fitointoxicação, a beterraba foi a que melhor apresentou estas características para ambos os herbicidas.

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Relative Competitiveness of Goosegrass Biotypes and Soybean Crops

Cited by 4 publications

References 14 publications

Competitive interaction between soybean cultivars and Sida rhombifolia

Competitive interaction between soybean cultivars and Sida rhombifolia

Effect of high temperature and recovery from stress on crop–weed interaction

Seleção de espécies bioindicadoras de resíduos de flumioxazina e saflufenacil no solo

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