%0 Journal Article
%T Sulfentrazone efficiency on Ipomoea hederifolia and Ipomoea quamoclit as influenced by rain and sugarcane straw Efic芍cia de sulfentrazone em Ipomoea hederifolia e Ipomoea quamoclit influenciada pela ocorr那ncia de chuva e palha de cana
%A N.M Correia
%A E.H Camilo
%A E.A Santos
%J Planta Daninha
%D 2013
%I Sociedade Brasileira da Ci那ncia das Plantas Daninhas
%R 10.1590/s0100-83582013000100018
%X The aim of this study was to assess the capacity of sulfentrazone applied in pre-emergence in controlling Ipomoea hederifolia and Ipomoea quamoclit as a function of the time interval between herbicide application and the occurrence of rain, and the presence of sugarcane straw on the soil surface. Two greenhouse experiments and one field experiment were conducted. For the greenhouse experiments, the study included three doses of sulfentrazone applied by spraying 0, 0.6, and 0.9 kg ha-1, two amounts of straw on the soil (0 and 10 t ha-1), and five time intervals between the application of herbicide and rain simulation (0, 20, 40, 60, and 90 days). In the field experiment, five herbicide treatments (sulfentrazone at 0.6 and 0.9 kg ha-1, sulfentrazone + hexazinone at 0.6 + 0.25 kg ha-1, amicarbazone at 1.4 kg ha-1, and imazapic at 0.147 kg ha-1) and two controls with no herbicide were studied. Management conditions with or without sugarcane straw on the soil were also assessed. From the greenhouse experiments, sulfentrazone application at 0.6 kg ha-1 was found to provide for the efficient control of I. hederifolia and I. quamoclit in a dry environment, with up to 90 days between herbicide application and rain simulation. After herbicide application, 20 mm of simulated rain was enough to leach sulfentrazone from the straw to the soil, as the biological effects observed in I. hederifolia and I. quamoclit remained unaffected. Under field conditions, either with or without sugarcane straw left on the soil, sulfentrazone alone (0.6 or 0.9 kg ha-1) or sulfentrazone combined with hexazinone (0.6 + 0.25 kg ha-1) was effective in the control of I. hederifolia and I. quamoclit, exhibiting similar or better control than amicarbazone (1.4 kg ha-1) and imazapic (0.147 kg ha-1). Objetivou-se neste trabalho avaliar o controle em pr谷-emerg那ncia de Ipomoea hederifolia e Ipomoea quamoclit pelo herbicida sulfentrazone em fun  o do intervalo de tempo entre a aplica  o e a ocorr那ncia de chuva e da manuten  o ou n o de palha de cana-de-a 迆car na superf赤cie do solo. Tr那s experimentos foram desenvolvidos: dois em casa de vegeta  o e um em campo. Nos experimentos em casa de vegeta  o, foram estudadas tr那s doses de sulfentrazone (0, 0,6 e 0,9 kg ha-1) pulverizado em duas quantidades de palha na superf赤cie do solo (0 e 10 t ha-1) e cinco intervalos de tempo entre a sua aplica  o e a simula  o de chuva (0, 20, 40, 60 e 90 dias). No experimento em campo, foram avaliados cinco tratamentos de herbicida (sulfentrazone a 0,6 e 0,9 kg ha-1; sulfentrazone + hexazinone a 0,6 + 0,25 kg ha-1; a
%K Boral
%K cana crua
%K corda-de-viola
%K reten  o de herbicidas
%K Saccharum officinarum
%K Boral
%K raw sugarcane
%K morning glory
%K herbicide retention
%K Saccharum officinarum
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000100018