Controle de plantas daninhas na produção de mudas de plantas ornamentais

Freitas, Francisco Cláudio Lopes de; Grossi, José Antônio Saraiva; Barros, Aline Ferreira; Mesquita, Eliane Rezende; Ferreira, Francisco Affonso

doi:10.1590/s0100-83582007000300020

Cited by 12 publications

(9 citation statements)

References 4 publications

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“…For commercial cultivation, using quality substrate, which supports the development of these flowering, becomes extremely important (Assis et al, 2010). However, orchids growth happens slowly (Suzuki et al, 2010), exposing the substrate for long periods to colonization by weeds such as Pilea microphylla (brilhantina), which affects seedlings development, increasing the cost of production and reducing their commercial value (Freitas et al, 2007b).…”

Section: Introductionmentioning

confidence: 99%

“…The ornamentals potted and bags Pilea microphylla (brilhantina) control is usually done by manual hoeing; regrowth could occur if the plant is not totally eliminated, since it easily emits new growing in the collecting region. Also, the high production of seeds that are easily transported by wind and handling promotes rapid reinfestation (Freitas et al, 2007b;. Lorenzi & Souza, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Chemical control of Pileamicrophylla in cattleya seedlings (Cattleyatenebrosa x Cattleyaleopoldy)

et al. 2014

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-Species of the orchidaceae family are grown for marketing flowers and among them the genus Cattleya stands out. However, due to its slow growth, the substrate is subjected to weed infestation. Therefore, this study aims to evaluate the selectivity and efficiency of herbicides in controlling Pilea microphylla in Cattleya orchid seedlings (Cattleya tenebrosa x Cattleya leopoldy). We used a completely randomized design with four replications. The evaluated herbicides were oxyfluorfen (0, 120, 240 and 480 g ha ) and metsulfuron-methyl (0, 1.2, 1.8 and 2.4 g ha -1). At post-emergence applying time, the Cattleya plants had three bulb sand were 10 cm tall, while P. microphylla, where 5 cm tall. Nicosulfuron, mesotrione and clethodim herbicides did not control P. microphylla, while oxyfluorfen and flumioxazin showed over 90% efficiency level sin controlling P. microphyllafrom 14 days after application (DAA). As to metsulfuron-methyl, it showed efficiency superior to 90% from the control dose of 1.8 g ha -1at 28 DAA. All herbicides were selective plants of Cattleya, however, only oxyfluorfen, flumioxazin and metsulfuronmethyl were effective in controlling P. microphylla.Keywords: weed, herbicide, floriculture, selectivity. ), flumioxazin (0, 12,5, 25 e 40 g ha -1 ), nicosulfuron (0, 20, 40 e 80 g ha -1 ), mesotrione (0, 96, 144 e 192 g ha -1 ), clethodim (0, 60, 84 e 108 g ha -1 ) e metsulfuron-methyl (0, 1,2, 1,8 RESUMO -Espécies da família

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical control of Pileamicrophylla in cattleya seedlings (Cattleyatenebrosa x Cattleyaleopoldy)

et al. 2014

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“…Battistus et al (2014) also found the same result in Cattleya orchid's seedlings (Cattleyatenebrosa x Cattleya leopoldy), being selective to the seedlings of floriferous and performing control of P. microphylla (above 90%) in 14 DAA for doses equal and/or superior to 120 g ha -1 a.i. In another study, Freitas et al (2007b) …”

Section: Resultsmentioning

confidence: 90%

“…However, due to the slow development of orchids (Suzuki et al, 2010), the substrate is exposed for long periods to infestation by weeds, such as Pilea microphylla (brilhantina), interfering with the development of the seedlings, raising costs of production, and reducing its commercial value (Freitas et al, 2007b).…”

Section: Introductionmentioning

confidence: 99%

“…The brilhantina control in ornamental crops is usually performed by manual pull-off and may regrow if it is not fully eliminated, since it easily regrow in regions of girth. In addition, the large seed production and barochory dispersal stimulated by handling during cultural practices promote fast reinfestation (Freitas et al, 2007b;Lorenzi and Souza, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Manejo químico de Pilea microphylla em mudas de orquídeas

Klein

Battistus

Hoffmann³

et al. 2015

RBHerbicidas

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-Orchidaceae species are produced on a large scale for commercialization of its flowers. However, because of its slow development, the substrate is subject to weed infestation, such as brilhantina (Pilea microphylla). Thus, we aimed to evaluate the selectivity of herbicides to the orchid seedlings of genre Rhynchostylis ([Rhynchostylis gigantea Alba x Rhynchostylis gigantea] X Rhynchostylis gigantea Semi-Alba) and control of P. microphylla. A completely randomized design with four replicates per treatment was adopted. The herbicides studied were oxyfluorfen (0, 120, 240, and 480 g ha -1 a.i.), flumioxazin (0, 12.5, 25 and, 40 g ha -1 a.i.), nicosulfuron (0, 20, 40, and 80 g ha -1 a.i.), and mesotrione (0, 96, 144, and 192 g ha -1 a.i.), with a control without application for each molecule. At the time of spraying, the plants of orchid presented four leaves and were 5 cm high, while P. microphylla was 10 cm high. Nicosulfuron did not control P. microphylla, while oxyfluorfen and flumioxazin showed control levels exceeding 90% on 14 days after application (DAA). The mesotrione showed low ability to control the weed, reaching around 35% efficiency at 49 DAA. All herbicides were selective to the hybrid seedlings Rhynchostylis. The oxyfluorfen and flumioxazin molecules were efficient in controlling P. microphylla in the tested dose ranges. Keywords: Rhynchostylis spp.; brilhantina; herbicide; floriculture; selectivity Resumo -Espécies da família Orchidaceae são produzidas em larga escala para comercialização de suas flores. Entretanto, devido ao seu lento desenvolvimento, o substrato fica sujeito à infestação de plantas daninhas, como a brilhantina (Pilea microphylla). Assim, objetivou-se avaliar a seletividade de herbicidas à mudas de orquídeas do gênero Rhynchostylis ([Rhynchostylis gigantea Alba x Rhynchostylis gigantea] X Rhynchostylis gigantea Semi-Alba) e controle de P. microphylla. Adotou-se delineamento inteiramente casualizado, com quatro repetições por tratamento. Os herbicidas estudados foram: oxyfluorfen (0, 120, 240 e 480 g ha -1 i.a.), flumioxazin (0, 12,5, 25 e 40 g ha -1 i.a.), nicosulfuron (0, 20, 40 e 80 g ha -1 i.a.) e mesotrione (0, 96, 144 e 192 g ha -1 i.a.), com uma testemunha sem aplicação para cada molécula. Na ocasião da pulverização as plantas de orquídea apresentavam quatro folhas e 5 cm de altura, enquanto que a P. microphylla possuía 10 cm de altura. O nicosulfuron não controlou P. microphylla, enquanto o oxyfluorfen e o flumioxazin apresentaram eficiência de controle superior a 90% a partir dos 14 dias após a aplicação (DAA). A mesotrione demonstrou baixa capacidade de controle da infestante, atingindo em torno de 35% de eficiência aos 49 DAA. Todos os herbicidas foram seletivos às mudas do híbrido de Rhynchostylis.

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Multi-mixture herbicides provide management strategies in the control of the aquatic weed Heteranthera reniformis

Zaidan

Motta

Souza

et al. 2020

J. Crop Sci. Biotechnol.

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Heteranthera reniformis (mud plantain) is a weed of aquatic habit, which currently causes losses in the production of ornamental plants and irrigated crops, such as rice, and for which there are no herbicides registered in Brazil with proven control effectiveness. This study evaluated the control effectiveness of individual and multi-mixture herbicides (i.e., glyphosate, 2,4-D, triclopyr, paraquat, oxyfluorfen, sulfentrazone, carfentrazone, diuron and S-metolachor) on post-emergence of mud plantain. An organosilicone spreader adjuvant was also evaluated. Weed injury assessments were carried out over time, at 7, 14, 21, 42, and 60 days after application (DAA) of the herbicides. At the end of the study (60 DAA), the weed dry matter was measured. The progress of weed injury was modeled using a time-trend decomposition procedure based on the LOcally wEighted Scatterplot Smoothing (LOESS) method. Treatments with glyphosate application proved to be more effective in relation to mud plantain injury over time, with a slight emphasis on treatments associated with triclopyr. However, evaluating the dry matter, the treatment with glyphosate alone was more effective; besides, it showed short-range injury variance in the control of H. reniformis. The inclusion of organosilicone adjuvant to some treatments was not quite successful. Regardless of the herbicide used, higher levels of initial injury are a fair predictor of final control effectiveness (i.e., period after the herbicide effect). On the other hand, less initial injury corresponded directly to low control effectiveness. The results suggest that the herbicides, glyphosate, triclopyr, and carfentrazone, are suitable for mud-plantain control.

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Controle de plantas daninhas na produção de mudas de plantas ornamentais

Cited by 12 publications

References 4 publications

Chemical control of Pileamicrophylla in cattleya seedlings (Cattleyatenebrosa x Cattleyaleopoldy)

Chemical control of Pileamicrophylla in cattleya seedlings (Cattleyatenebrosa x Cattleyaleopoldy)

Manejo químico de Pilea microphylla em mudas de orquídeas

Multi-mixture herbicides provide management strategies in the control of the aquatic weed Heteranthera reniformis

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