Planta Daninha (2011) 29, 1061-1068

E. Negrisoli, C.A. Carbonari, M.R. Corrêa, L. Perim, E.D. Velini, R.E.B. Toledo, R. Victoria Filho and C.V.S. Rossi (2011)
Efeitos de Diferentes condições de umidade do solo e profundidades de germinação de Brachiaria plantaginea e Digitaria spp. sobre a eficácia do herbicida tebuthiuron
[Effect of soil humidity conditions and germination depths of Brachiaria plantaginea and Digitaria spp. on tebuthiuron efficacy]
Planta Daninha 29 (spec. issue), 1061-1068
Abstract: This work aimed to carry out an experiment under greenhouse conditions to evaluate the effect of humidity conditions and germination depth of Brachiaria plantaginea and Digitaria spp. on the efficacy of tebuthiuron. The treatments were constituted by five germination depths of the weeds and different herbicide application conditions (1; 2; 3; 4 and 5 cm) and four humidity conditions. The following treatments were applied: treatment 1: 15 mm of rainfall, followed by herbicide application; treatment 2: 15 mm of rainfall, followed by herbicide application and 15 mm of rainfall after 7 days; treatment 3: 15 mm of rainfall, followed by herbicide application and 15 mm of rainfall after 14 days; and treatment 4: herbicide application on dry soil and 15 mm of rainfall after 14 days, and a control without application. The treatments were arranged in a 5 x 5 factorial scheme, with four repetitions. The weeds were seeded in vases at the different depths. Tebuthiuron promoted an effective control of the plants of B. plantaginea at all depths tested and application conditions, with a significant flaw in the control of the plants that germinated at 5 cm depth where the herbicide was applied to wet soil and without rainfall. For Digitaria spp., excellent plant control levels were initially observed, with flaws in the control for wet soil application, followed by rainfall occurrence at 14 DAA at depths of 2 and 3 cm, indicating possible leaching of this herbicide for layers below 3 cm in the soil.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Caio A. Carbonari

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Digitaria (weeds)
	Urochloa plantaginea (weed)