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Registros recuperados: 14
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Ammonium Glufosinate Associated with Post-Emergence Herbicides in Corn with the cp4-epsps and Pat Genes Planta Daninha
KRENCHINSKI,F.H.; CESCO,V.J.S.; CASTRO,E.B.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: With the possibility of using ammonium glufosinate in corn, studies on its association with other herbicides are essential. The aim of this study was to assess weed control and herbicide selectivity in association with ammonium glufosinate in corn containing the pat and cp4-epsps genes. The experiment was carried out under field conditions in two sites in a randomized block design with four replications. Treatments consisted of ammonium glufosinate, glyphosate, ammonium glufosinate + glyphosate, ammonium glufosinate + nicosulfuron, ammonium glufosinate + atrazine, ammonium glufosinate + tembotrione, ammonium glufosinate + mesotrione, ammonium glufosinate + carfentrazone ethyl, ammonium glufosinate + bentazon, ammonium glufosinate + 2,4-D, control...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia accumulation; Phosphinothricin; Electron transport rate; Herbicide resistance; Zea mays.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100241
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Dynamics of Clomazone Formulations Under Different Applications Conditions Planta Daninha
TROPALDI,L.; BRITO,I.P.F.S.; DIAS,R.C.; TRINDADE,M.L.B.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: Maintenance of straw on the soil surface in sugarcane production areas can influence weed occurrence and herbicide dynamics. After application, considerable losses of clomazone can occur as a result of its physicochemical characteristics. For this reason, novel formulations have been developed. In addition to the conventional formulation, microencapsulated formulations are currently available. Thus, the aim of this study was to observe and compare the effect of clomazone formulations under different application conditions. For this purpose, the experiment was carried with 12 treatments in a completely randomized design, with four replications, using clomazone formulations (1,200 g a.i. ha-1), on soils with different moisture levels, in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Straw; Herbicide; Volatilization; Ipomoea nil (L.) Roth; Urochloa decumbens (Stapf.) R.D.Webster; Panicum maximum Jacq.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100274
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Effects of 2,4-D Herbicide on Species of the Digitaria Genus Planta Daninha
GAZOLA,T.; DIAS,M.F.; DIAS,R.C.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: The objective of this work was to evaluate the effects of the 2,4-D herbicide on the growth and development of Digitaria insularis and Digitaria horizontalis plants under different climatic conditions. Two greenhouse experiments were conducted in a completely randomized design, with 11 treatments (rates of the herbicide) and four replications. Rate-response curves were determined for the 2,4-D rates of 0, 50.37, 100.75, 201.5, 403, 806, 1,612, 3,224, 6,448, 12,896, and 25,792 g a.i. ha-1. The plants presented growth stimulus with low rates of 2,4-D in the autumn-winter period, but this stimulus was not found in the spring-summer period. The plants subjected to application of high rates of 2,4-D had significantly lower growth and development than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Synthetic auxin; Digitaria insularis; Digitaria horizontalis; Hormesis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100173
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Glyphosate as Growth Regulator for Bahiagrass and Broadleaf Carpetgrass Planta Daninha
DIAS,R.C.; DADAZIO,T.S.; TROPALDI,L.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: The objective of this work was to evaluate the effect of glyphosate herbicide as growth regulator on two turfgrasses bahiagrass and broadleaf carpetgrass. The experiments were conducted in a greenhouse, using a completely randomized design, with 10 glyphosate rates (0, 5.625, 11.25, 22.5, 45, 90, 180, 360, 720, and 1.440 g a.e. ha-1) and four replicates. Bahiagrass and broadleaf carpetgrass plants were transplanted to 2 liter pots filled with a clayey soil. Phytotoxicity and green cover index (GCI) were evaluated through digital analysis; plant height at 7, 14, 21, and 28 days after application (DAA); and dry biomass of cuttings at 28 DAA. The glyphosate rates of 5.625 to 22.5 g a.e. ha-1 (for bahiagrass) and up to 90 g a.e. ha-1 (for broadleaf...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Axonopus compressus; Phytotoxicity; Turfgrass; Herbicide; Paspalum notatum.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100158
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Growth and Development of Sourgrass Plants from Vegetative Parts of Clumps Planta Daninha
GAZOLA,T.; DIAS,M.F.; BONATTO,V.M.; BELAPART,D.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: Sourgrass (Digitaria insularis) is a perennial plant with high infestation potential, has fast and aggressive development, and reproduces by seeds and rhizomes. D. insularis infestations have increased in agricultural areas without cover crops established between the main crop seasons. The control of this species has become one of the most expensive in these areas in Brazil. The present work evaluated the growth and development of D. insularis plants from different vegetative parts of clumps. Two greenhouse experiments were conducted in a completely randomized design, with four replications. A 5 × 4 factorial arrangement was used, with factor A corresponding to the different propagation methods, and factor B corresponding to the biotypes used...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digitaria insularis; Weeds; Resistance to herbicides.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100182
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Influence of Adjuvants on the Surface Tension, Deposition and Effectiveness of Herbicides on Fleabane Plants Planta Daninha
CASTRO,E.B.; CARBONARI,C.A.; VELINI,E.D.; GOMES,G.L.G.C.; BELAPART,D..
ABSTRACT: The use of herbicides is widespread in weed management, and adjuvants are added to the spray solution to improve the effectiveness of applications. The goal was to evaluate the influence of adjuvants added to the herbicides saflufenacil and glyphosate, isolated or in combination, and the effects on the surface tension, deposition and effectiveness in post-emergence applications to control Conyza sumatrensis. Experiments were conducted completely randomized experimental design to evaluate surface tension (TS), deposition and herbicide effectiveness. The treatments were glyphosate, glyphosate + saflufenacil and saflufenacil with or without the adjuvants Natur’al óleo®, Assist®, Aterbane®, Sillwet L-77 and Dash HC® (surface tension). For the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conyza sumatrensis; Glyphosate; Saflufenacil; Surfactants.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100267
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INFLUENCE OF GLYPHOSATE ON SUSCEPTIBLE AND RESISTANT RYEGRASS POPULATIONS TO HERBICIDE Planta Daninha
PICOLI JR,G.J.; CARBONARI,C.A.; MATOS,A.K.A.; RODRIGUES,L.F.O.S.; VELINI,E.D..
ABSTRACT In Brazil, ryegrass (Lolium multiflorum) has been identified as resistant to glyphosate, becoming a major problem, especially in crops cultivated in the winter season. This herbicide can indirectly affect photosynthesis by inhibiting biosynthesis of many compounds. Thus, the aim of this study was to investigate the influence of glyphosate on the physiological profile of susceptible and resistant ryegrass populations to the herbicide. The experimental design was completely randomized with two treatments (720 and 1,080 g e.a. ha-1) and four replications plus control with no treatment. Two ryegrass populations were sown, one susceptible and another one resistant to glyphosate. After the treatments, evaluations were carried out at 1, 3, 7 and 28 days...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide resistance; Photosynthesis; Lolium multiflorum.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100253
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MAIZE STOVER DEGRADATION UNDER THE INFLUENCE OF HALOXYFOP-METHYL UNDERDOSES Planta Daninha
JASPER,S.P.; VELINI,E.D.; PICOLI JR.,G.J.; CARBONARI,C.A.; SILVA,P.R.A..
ABSTRACT One of the major constraints to sustainable tillage is the rapid decomposition of the dry matter. The mechanism known to facilitate this process is the interference in the metabolic pathways of lignin polymers from spraying herbicide underdoses. This study has aimed to verify the effect of underdoses of haloxyfop-methyl in the synthesis of lignin and correlate the interference of this phenolic compound in the decomposition of maize stover. Two preliminary experiments were carried out in a greenhouse to set up the best underdoses to be applied in the yield area experiment. The treatments in the first experiment consisted of: 0; 2.5; 5 and 10 g a.i. ha-1 of haloxyfop-methyl herbicide. And in the second experiment: 0; 0.625; 1.25 and 2.5 g a.i. ha-1...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Herbicide; Levels of lignin; Growth stimulus.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300509
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Monitoring of Resistance of Sourgrass to Glyphosate Herbicide in Urban Areas of the State of São Paulo, Brazil Planta Daninha
GAZOLA,T.; DIAS,M.F.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: The objective of this work was to monitor the resistance of sourgrass (Digitaria insularis) to glyphosate in urban areas of the State of São Paulo to understand the spread of resistant biotypes. Three experiments were conducted under greenhouse conditions in a completely randomized design, with four replications. In the first experiment, seven sourgrass biotypes were used, and the control of plants was evaluated at 7, 14, 21, 28, and 35 days after application (DAA) of glyphosate. In the second experiment, the shikimic acid accumulation was quantified at 72 hours after the glyphosate application, and the same evaluations of weed control were performed. In the third experiment, rate-response curves were developed, with glyphosate at rates of 0, 90,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Shikimic acid; Digitaria insularis; EPSPS; Resistance.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100183
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Phytosociology of Weeds in Off-Season Maize Crops in the Middle Paranapanema Planta Daninha
GAZOLA,T.; DIAS,M.F.; DUARTE,A.P.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: This work is the first one after the consolidation of the introduction of the RR technology in maize and soybean crops, following weed surveys previously carried out in the region of the Middle Paranapanema, São Paulo state. The objective was to carry out a phytosociological survey of weeds in off-season maize crops no-tillage, in the same properties where the studies had been previously carried out, in the described region, taking into account the management of the weed community adopted by farmers, and the percentage of plant coveron the soil. The surveys were carried out in 19 farms conducted under no-tillage systems, with off-season maize cultivated in soybean succession, both RR crops, in nine municipalities of the São Paulo region of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicides; Weeds; No-tillage; Zea mays.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100313
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Selectivity of Herbicides Inhibitors of Photosystem II for Sugarcane Cultivars Planta Daninha
SIMÕES,P.S.; CARBONARI,C.A.; NASCENTES,R.F.; STASIEVSKI,A.; VELINI,E.D..
ABSTRACT For the successful execution of chemical weed control in sugarcane crop, the selectivity of herbicides is a factor of great importance to maximize crop yield. Each cultivar may respond differently to the same herbicide in the same dose, and selectivity is not only determined by the visual presence or absence of phytotoxicity. Thus, the aim of this study was to evaluate the effects of herbicides amicarbazone, tebuthiuron, and diuron + hexazinona on the electron transport rate in photosystem II (ETR), along with the development and yield of sugarcane cultivars RB867515, CTC 4, CTC 9, and CTC 17 in greenhouse, and field conditions. Under greenhouse conditions ETR was assessed by a portable fluorometer, aa well as dry weight and phytotoxicity of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amicarbazone; Tebuthiuron; Diuron; Hexazinona; Electron transport rate; Saccharum spp.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400803
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Sensitivities of Urochloa decumbens Plants to Glufosinate Planta Daninha
BRITO,I.P.F.S.; MARCHESI,B.B.; TROPALDI,L.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: This study aimed to assess the response of Urochloa decumbens plants to different doses of glufosinate ammonium, and the sensitivity of plant population to the herbicide. Two studies were conducted, both in greenhouse and repeated at different times. In the dose-response analysis, two experiments were conducted using seven doses of the glufosinate ammonium (0, 50, 100, 200, 400, 800, and 1,600 g a.i. ha-1) with four replications each. In the analysis of sensitivity levels of U. decumbens to herbicide, 44 plants were sprayed with a dose of 200 g a.i. ha-1 of the herbicide. Tissue ammonium content was determined, and injury percentage was visually assessed. Experiment data were converted to mg of ammonium per kg-1 of fresh mass and submitted to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia; Glutamine synthetase; Weed; Variability.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100238
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SENSITIVITY OF MORNINGGLORY PLANTS AND THEIR PROGENIES TO GLUFOSINATE AMMONIUM Planta Daninha
BRITO,I.P.F.S.; MORAES,C.P.; MARCHESI,B.B.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT The sensitivity of weed species to herbicides is variable, and the behavior can be repeated or not in the next generation. The objective of this study was to evaluate the response of morningglory plants to different doses of glufosinate ammonium and the sensitivity of plant populations and their progenies to the herbicide. Three studies were conducted, all in a greenhouse and repeated in two periods. In the first study, two experiments were conducted to examine the dose-response curve, and the treatments were seven different doses of the herbicide glufosinate ammonium (0, 50, 100, 200, 400, 800, and 1,600 g a.i. ha-1), with four replications each. In the second study, which examined the range in sensitivity of morningglory to glufosinate ammonium,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia; Glutamine synthetase; Ipomoea grandifolia; Weed.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100211
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VINASSE EFFECT ON HERBICIDES CLOMAZONE AND TEBUTHIURON AVAILABILITY IN DIFFERENT KINDS OF SOILS Planta Daninha
MATOS,A.K.A.; CARBONARI,C.A.; VELINI,E.D.; GOMES,G.L.G.C.; TRINDADE,M.L.B.; MACEDO,G.C..
ABSTRACT The objective of this study was to evaluate the availability of herbicides clomazone and tebuthiuron in the solution in different kinds of soils saturated with water or vinasse. Samples of 30 soils with different characteristics were arranged on trays to the herbicides spraying. Then they were homogenized, placed in plastic cartridges and saturated with deionized water or vinasse, and remaining at rest during 18 hours. Two extractions were made, the first one quantified the presence of the herbicides in the soil solution and in the second one the total extraction of herbicide remaining in the soil was taken to determine the recovery percentage of each herbicide tested. For quantification, a LC-MS/MS system was used, a compound of a high...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sugarcane; Mass spectrometry; HPLC; Sorption.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400771
Registros recuperados: 14
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