Eficiência do triclopyr no controle de plantas daninhas em gramado (Paspalum notatum)

Abstract

RESUMO -As plantas daninhas interferem nos gramados, prejudicando a sua formação, qualidade e estética. O carrapicho-beiço-de-boi (Desmodium incanum) e a zórnia (Zornia latifolia), quando não controlados, podem atingir níveis de infestação que chegam a dizimar o gramado. Dentre as diversas técnicas de manejo de plantas daninhas em gramados, destaca-se o emprego de herbicidas; todavia, as informações sobre a utilização desses produtos em gramados são escassas. O objetivo deste trabalho foi avaliar a eficiência do herbicida triclopyr no controle de Desmodium incanum e Zornia latifolia, infestantes da grama-batatais (Paspalum notatum). O trabalho foi desenvolvido em gramado estabelecido no campus da Universidade Federal de Viçosa, em Viçosa-MG, entre os meses de abril e maio de 2000. Os tratamentos avaliados foram seis doses do triclopyr (0,00; 0,24; 0,48; 0,72; 0,96; e 1,20 kg ha ). Concluiu-se que o triclopyr mostrou-se seletivo para grama-batatais, proporcionando excelente controle das plantas daninhas acima mencionadas. Viçosa, in Viçosa-MG, Brazil, from April to May 2000. The treatments were six doses of triclopyr (0.00; 0.24; 0.48; 0.72; 0.96 Palavras-chave: Desmodium incanum, Zornia latifolia, Paspalum notatum, 2,4-D, picloram. ABSTRACT -Weeds interfere in the formation, quality and aesthetics of the lawn. Desmodium incanum, and Zornia latifolia, when left uncontrolled, can reach infestation levels that would kill the lawn. Herbicide application is one of the most effective ways of handling weeds in lawn; however, information on the use of these products in lawns is scarce. The objective of this work was to evaluate the efficiency of the herbicide triclopyr in controlling Desmodium incanum and Zornia latifolia in the lawn Bahiagrass (Paspalum notatum). The experiment was developed in a lawn area of the campus of the Federal University of

Taxas de aplicação e herbicidas no controle de plantas daninhas em pastagem

“…At 21 and 28 DAA, only herbicide 2,4 D and the control without application did not cause a 100% control of D. incanum. According to Freitas et al (2003), herbicides 2,4 D + picloram and triclopyr promoted good control of D. incanum in grasses at 15 and 30 DAA. This was observed in the mix of fluroxypyr-meptyl + triclopyr and 2,4 D + picloram at 21 DAA in this study.…”

Weed Management and Herbicide Selectivity in Ornamental Plants

“…In turn, weeds cause loss of aesthetic quality, seriously compromising it (Freitas et al, 2003). Thus, chemical control with the use of herbicides stands out as an alternative for weed management, as it contributes to reducing maintenance costs and extending lawn life.…”

Phytosociological Survey of Weeds in Carpet Grass in Distinct Periods of the Year

“…According to Vermeij (1996), invasive species, when introduced from other environments, adapt and begin to reproduce enough to occupy the space of native species and produce changes in natural ecological processes, tending to become dominant after a period of time required to adapt. Thus, weeds can, besides competing for water, light and nutrients, impair the physical space, formation, aesthetics and management of lawn, ending up, in some cases, to decimating it altogether (Freitas et al, 2003).…”