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|Research center of Embrapa/Collection:||Embrapa Agrossilvipastoril - Resumo em anais de congresso (ALICE)|
|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.
|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.|
|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.|
|Appears in Collections:||Resumo em anais de congresso (CPAMT)|
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