Ocorrência de plantas daninhas no cultivo de bromélias

Rodrigues, I.M.C.; Ferreira, F.A.; Grossi, José Antônio Saraiva; Barbosa, José Geraldo; Paula, Cláudio Coelho de; Reis, Marcelo Rodrigues dos

doi:10.1590/s0100-83582007000400009

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…microphylla presents fast development in shaded and high humidity conditions, being opportunistic and commonly observed along the potted ornamental plants (Rodrigues et al, 2007). 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.…”

Section: Introductionmentioning

confidence: 99%

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%

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

et al. 2014

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“…The most common weed species present in the field of ornamental plants are the Cyperus rotundus (purple nutsedge) and Oxalis latifolia (sour clover), often cited as causes of production losses due to competition or release of allelopathic compounds (RASTEGAR et al, 2016;QUEIROZ et al, 2016;PRASAD and SHIVAY, 2017). Both species are found in bromeliads production (RODRIGUES et al, 2007;SALA et al, 2007), but they may also be found in field of roses, chrysanthemum, gerbera, tango, lily and snapdragon.…”

Section: Introductionmentioning

confidence: 99%

Allelopathy of extracts of Cyperus rotundus and Oxalis latifolia on snapdragon seeds germination

Pêgo¹,

Fialho²

2018

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Snapdragon (Anthirrhinum majus L.) is an ornamental plant propagated by seeds and usually cultivated in beds. In production fields occur many weeds, such as Cyperus rotundus and Oxalis latifolia, which can decrease flower production by competition or releasing allelopathic components. However, there is few knowledge about the effect of these allelopathic components on snapdragon seed germination. Therefore, this study aimed to determine the allelopathic potential of aqueous extracts of C. rotundus and O. latifolia on the germination of snapdragon. For this, 10 g of material vegetal from whole plants of C. rotundus or O. latifolia were ground in 100 mL of water (10% w v-1). The dilutions of aqueous extracts in 75%, 50%, 25% and 0 were prepared using distilled water. The seeds were kept in paper moistened with extracts, in box gerbox-type, and conditioned in a germination chamber for 11 days. After 11 days the percentage of germination, vigor, germination speed index (GSI), percentage of abnormal seedlings and dead seeds, root length and shoot seedlings were evaluated. Extracts of C. rotundus and O. latifolia reduced the percentage of seed germination by up to 17.6% and 43.7%, respectively. The vigor was reduced from 55.0% to 28.5% and IVG reduced from 27 to 12 in extracts of O. latifolia. The maximum of 49.5% and 35.5% of dead seeds was obtained in extracts of O. latifolia and C. rotundusrespectively. The highest concentrations of extracts of both species altered the morphology of snapdragons seedlings reducing the length of radicle and shoot.

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“…Also considered ornamental depending on the application, P. microphylla shows rapid growth and competitiveness in shaded conditions and high humidity, being opportunistic and commonly seen next to potted plants used in landscape design and decoration (Rodrigues et al, 2007). 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.…”

Section: Introductionmentioning

confidence: 99%

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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Ocorrência de plantas daninhas no cultivo de bromélias

Cited by 6 publications

References 5 publications

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

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

Allelopathy of extracts of Cyperus rotundus and Oxalis latifolia on snapdragon seeds germination

Manejo químico de Pilea microphylla em mudas de orquídeas

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