Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1119866
Research center of Embrapa/Collection: Embrapa Agrossilvipastoril - Resumo em anais de congresso (ALICE)
Date Issued: 2019
Type of Material: Resumo em anais de congresso (ALICE)
Authors: IKEDA, F. S.
CAVALIERI, S. D.
LIMA JÚNIOR, F. M. L.
METZ, L. H.
FONSECA, B. T.
POLTRONIERI, F.
Additional Information: FERNANDA SATIE IKEDA, CPAMT; SIDNEI DOUGLAS CAVALIERI, CNPA; FELIX M. LIMA JÚNIOR, UFMT, Sinop-MT; LUIS H. METZ, UFMT, Sinop-MT; BARBARA T. FONSECA, UFMT, SInop-MT; FERNANDO POLTRONIERI, UFMT, Sinop-MT.
Title: Control of amaranthus palmeri resistant to als and epsp inhibitors with pre and postemergence herbicides in intercropping of corn and marandu grass.
Publisher: In: WEED SCIENCE SOCIETY OF AMERICA ANNUAL MEETING, 2019, New Orleans, LA. Proceedings... New Orleans: WSSA, 2019. não paginado. resumo 169.
Language: en
Keywords: Capim marandu
Mato Grosso
Sinop-MT
Description: The Palmer´s amaranth is in eradication process at Mato Grosso, due to its potential risk to national agriculture. The objective of this work was to study management alternatives of this species, with a randomized block design and factorial scheme (2 x 5) with four blocks, two systems ([single and intercropping maize with marandu grass (Urochloa brizantha cv. Marandu)]. and three herbicidal treatments (ae g ha-1 ): atrazine (2,500) PRE, atrazine (2,500) PRE / atrazine + tembotrione (1,500 + 50) POST and atrazine + tembotrione (1,500 + 50) POST. The herbicides were applied with CO2 pressurized sprayer and application volume of 200 L ha-1 . The control of Palmer?s amaranth and marandu grass intoxication were evaluated at 7 and 21 days after application (DAA) with grades from 0 to 100. At 7 and 21 DAA, the applications in POST and PRE + POST showed similar control of the Palmer´s amaranth, without influence of the cultivation systems. At 7 and 21 DAA, there was effect of the system in the application only in PRE and non-weeded control, without differing among them, being the greater control in the intercropping (> 80% in the two evaluations). There was no significant difference (p <0.05) for stand, number of rows / ear and yield (kg ha-1 ), although the height of insertion of the spike and maize and grain / row plants was higher in the intercropping. The application in PRE did not intoxicate the marandu grass, unlike those in POST (approximately 20% at 21 DAA), besides not reducing the density and the dry mass of the marandu grass. It is concluded that the management in the maize associated with marandu grass controls the Palmer?s amaranth.
Thesagro: Pré-Emergência
Pós-Emergência
Herbicida
Data Created: 2020-02-05
Appears in Collections:Resumo em anais de congresso (CPAMT)


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