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Registros recuperados: 9
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Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate Planta Daninha
CARVALHO,L.B.; DUKE,S.O.; MESSA,J.R.; COSTA,F.R.; BIANCO,S..
ABSTRACT Glyphosate is commonly used for intra-row weed management in perennial plantations, where unintended crop exposure to this herbicide can cause growth reduction. The objective of this research was to analyze the initial plant growth behavior of young apple and pear plants exposed to glyphosate. Glyphosate was sprayed on 2-year-old 'Gala' apple and 'Abbè Fetel' pear plants at doses from 18 to 720 g per hectare of acid equivalent (a.e.). The plant height of neither species was not significantly reduced (less than 1%) by any glyphosate dose at 240 days after spraying, whereas the stem diameter and the dry mass of stem and leaves were reduced by 720 g a.e. ha-1. The glyphosate dose required to reduce the aboveground dry mass by 50% was 162 and 148 g...
Tipo: Info:eu-repo/semantics/article Palavras-chave: N-phosphonomethyl-glycine; Malus domestica; Pyrus communis; Spray drift.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400815
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Weed Interference on Productivity of Bell Pepper Crops Planta Daninha
ULJOL,L.H.O.; BIANCO,S.; FILHO,A.B.C.; BIANCO,M.S.; CARVALHO,L.B..
ABSTRACT: The objective of this work was to determine the interference periods of weeds of the bell pepper cultivar ‘Dahra’. Two experiments were conducted during the years 2014/15 (harvest with lower rainfall) and 2015/16 (harvest with higher rainfall). The treatments consisted of 11 growing periods of cohabitation and weed control with ‘Dahra’ bell peppers: 14, 28, 42, 56, 70, 84, 98, 112, 126, 140 and 154 days after transplanting (DAT). For the determination of the interference periods, the productivity data were analyze using the Boltzmann sigmoidal regression model. The main weeds were Eleusine indica, Brachiaria plantaginea, Digitaria nuda and Nicandra physaloides for presenting high biomass and relative density. The concomitance of these weeds...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capsicum annuum; Competition; Coexistence.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100247
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Phytosociological Survey and Weed Interference in Eggplants Cultivation1 Planta Daninha
MARQUES,L.J.P.; BIANCO,S.; C. FILHO,A.B.; BIANCO,M.S..
ABSTRACT Eggplants are vegetables of great importance in the South and Southeast regions of Brazil, which are subject to interference from weeds. In order to collaborate with weed management in this vegetable, this study was carried out to determine the periods of weed interference in growing eggplants. The study was conducted in the Brazilian municipality of Jaboticabal, SP, at the Faculty of Agricultural and Veterinary Sciences, UNESP [Universidade Estadual Paulista "Júlio de Mesquita Filho" (São Paulo State University)], in the period from February to July 2013. The experiment was arranged in a randomized block design with 22 treatments, three replications divided in 11 periods of coexistence and weed control with eggplants: 14, 28, 42, 56, 70, 84, 98,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum melongena; Competition; Productivity; Weed community.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200309
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Atrazine Reduces the Critical Period of Weed Interference on Narrow Row Corn Planta Daninha
PADILHA,M.; BARROSO,A.A.M.; CARVALHO,L.B.; COSTA,F.R.; BIANCO,S..
ABSTRACT The objective was to determine whether a change occurs in the critical period of weed interference prevention in narrow row corn with the use of atrazine and whether there is influence of the herbicide on crop yield components. The treatments consisted of periods without or with an initial weed control (0, 21, 35, 49, 63, 77, and 91 days after emergence), with or without application of atrazine in spikely post-emergence. The experiment was carried out in a 2 x 7 randomized blocks design (with and without weed control and seven periods with three replications). The use or not of atrazine was arranged in a split plot design. The most important weed species were Senecio brasiliensis, Urochloa plantaginea, Conyza bonariensis, Sida rhombifolia, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide; Period of coexistence; Zea mays.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400721
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Crescimento e nutrição mineral de Urochloa arrecta Planta Daninha
BIANCO,S.; CARVALHO,L.B.; BIANCO,M.S.; YAMAUCHI,A.K.F..
O experimento foi conduzido com o objetivo de analisar o crescimento e a distribuição de matéria seca e os teores e acúmulos dos macronutrientes em plantas de Urochloa arrecta cultivadas em condições padronizadas de nutrição mineral. As plantas cresceram em vasos de sete litros com substrato de areia, irrigados diariamente com solução nutritiva, e foram mantidas em casa de vegetação. Os tratamentos corresponderam às épocas de avaliação (21, 35, 49, 63, 77, 91, 105, 119, 133, 147 e 161 dias após a emergência – DAE) e foram arranjados em delineamento inteiramente casualizado com quatro repetições. Plantas de U. arrecta apresentaram baixo acúmulo (menor que 7% dos valores máximos acumulados aos 161 DAE) de matéria seca (5,1 g MS por planta) e de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Braquiária-do-brejo; Planta daninha; Matéria seca; Nutrientes.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100033
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Weed Community in a Raw Sugarcane Renovation Area Submitted to Different Soil Managements Planta Daninha
SOARES,M.B.B.; BIANCO,S.; FINOTO,E.L.; BOLONHEZI,D.; ALBUQUERQUE,J.A.A.; SILVA,A.A..
The objective of this study was to evaluate the weed community in a raw sugarcane renovation area with three soil managements and peanut sowing in succession. The experiment was conducted during the 2007/08 season on a raw sugarcane area harvested without prior burning in the last five cuts. A randomized block design with treatments arranged in a split plot and arranged in four replications was used. The main treatments consisted of three cropping systems: conventional tillage, minimum tillage and direct planting, and subplots consisted in the absence (resting) or presence of crop rotation with peanuts. After 135 days from planting peanuts and 180 days of sugarcane harvest, the number of weeds m-2 was counted and the shoot dry biomass of the weeds...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arachis hypogaea Saccharum spp. direct planting minimum tillage fallow; Phytosociology.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100091
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Weed Interference on the Accumulation of Dry Mass and Macronutrients of Eggplant ‘Nápoli’ Planta Daninha
MARQUES,L.J.P.; BIANCO,M.S.; BIANCO,S.; FILHO,A.B.C.; CERVEIRA JR,W.R.; CARVALHO,L.B..
ABSTRACT: The presence of weeds may affect both growth and nutrition of agricultural crops due to interference. The objective was to evaluate the interference of weeds in the dry mass distribution and in the accumulation of dry mass and macronutrients in eggplant. The treatments consisted of increasing weed-free and weedy periods (0-14, 0-28, 0-42, 0-56, 0-70, 0-84, 0-98, 0-112, 0-126, 0-140 and 0-154 days after transplanting) in eggplant ‘Nápoli’. The experiment was arranged in a randomized block design with three replicates. Weeds affected the distribution of dry mass between vegetative and reproductive organs of eggplant. There was a significant reduction in the accumulation of dry mass and macronutrients when weeds grew with eggplant crop beyond 42...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum melogena; Weed competition; Plant growth; Mineral nutrition.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100298
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Non-Destructive Model to Predict Commelina diffusa Leaf Area Planta Daninha
CARVALHO,L.B.; ALVES,E.A.; BIANCO,S..
ABSTRACT: Leaf length (L), leaf width (W), and leaf area (LA) were measured from 100 leaves aiming to determine a simple linear equation (Y=a*X) to predict the leaf area of Commelina diffusa, an important weed infesting annual and perennial crops in Brazil and worldwide. Results indicate the equation LA=0.7*LW reliably estimates the leaf area of C. diffusa, after correlating LA with LW, and then validating that equation by analyzing four new 25-leaf samples.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plant growth; Biometry; Non-destructive method; Mathematical model; Climbing dayflower.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100286
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Effectiveness of Diquat, Copper Hydroxide, Copper Oxychloride and their Association in Control of Submerged Macrophytes Ceratophyllum demersum Planta Daninha
GARLICH,N.; CRUZ,C.; SILVA,A.F.; MALASPINA,I.C.; FERREIRA,R.G.; TEDESQUE,M.G.; PITELLI,R.A.; BIANCO,S..
The aims of this study were to evaluate the effectiveness of diquat, copper hydroxide, copper oxychloride and their associations diquat + 0.1% copper oxychloride and diquat + 0.1% copper hydroxide to control Cerathophyllum demersum. Therefore, the concentrations used were 0.1, 0.3, 0.5, 0.7, 1.0 and 1.5 mg L-1 oxychloride and copper hydroxide and 0.2, 0.4, 0.8 and 1.2 mg L-1 diquat and their associations with 0.1% copper oxychloride and 0.1% copper and a control hydroxide. The experimental design was completely randomized with ten replications for 45 days. For evaluation we used a scale of 0-100% control of notes and rated the weight (g) and length (cm) of pointers at the end of the trial period. Diquat showed 100% efficacy at 30 DAA, associations in 21...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquatic plants; Algaecide effect; Chemical management.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100117
Registros recuperados: 9
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