%0 Journal Article
%T Seletividade de herbicidas residuais ao feij o-comum durante o per赤odo inicial da fase vegetativa Selectivity of residual herbicides to common bean during the early period of the vegetative phase
%A A. Kalsing
%A R.A. Vidal
%J Planta Daninha
%D 2013
%I Sociedade Brasileira da Ci那ncia das Plantas Daninhas
%X Avaliou-se neste trabalho a seletividade de herbicidas residuais, aplicados em doses crescentes, na condi  o de pr谷-emerg那ncia, sobre o crescimento do feij o-comum (Phaseolus vulgaris) durante o in赤cio da fase vegetativa da cultura. O estudo foi conduzido em casa de vegeta  o, em delineamento inteiramente ao acaso e com tratamentos arranjados em esquema fatorial, utilizando-se cinco repeti  es. O cultivar de feij o utilizado para avaliar os efeitos dos tratamentos foi o IPR Gra迆na. O fator A foi composto de cinco herbicidas de aplica  o em pr谷-emerg那ncia do feijoeiro comum, e o fator B, de doses crescentes desses herbicidas. Os herbicidas foram alachlor, dimethenamid, S-metolachlor, pendimethalin e trifluralin, e as doses corresponderam a 0, 100, 150, 200 e 300% da dose m芍xima registrada para uso na cultura do feij o-comum. As vari芍veis avaliadas foram emerg那ncia de plantulas, intoxica  o visual das plantas e massa seca das plantas, aos 05, 20 e 25 dias ap車s a emerg那ncia, respectivamente. Alachlor n o foi seletivo ao feij o-comum, ao passo que dimethenamid, S-metolachlor, pendimethalin e trifluralin o foram, quando aspergidos at谷 a m芍xima dose registrada. O n赤vel de seletividade dos herbicidas dimethenamid e S-metolachlor variou de acordo com a dose aplicada, enquanto o de pendimethalin e trifluralin n o se modificou. The objective of this work was to evaluate the selectivity of residual herbicides applied at increasing rates, under pre-emergence condition, to common bean crop (Phaseolus vulgaris) during the early period of the vegetative phase. The experiment was arranged in a randomized design under greenhouse conditions, with the treatments in a two-factorial scheme, using five replicates per treatment. The common bean cultivar IPR Gra迆na was used as a reagent of the treatments. Factor A was composed by the herbicides, and Factor B, by the rates. The herbicides were alachlor, dimethenamid, S-metolachlor, pendimethalin, and trifluralin, and the rates corresponded to 0, 100, 150, 200, and 300% of the maximum label rate for use in the common bean. The variables applied were plantlet emergence, visual intoxication and dry mass of the common bean, respectively, at 05, 20, and 25 days after emergence. Alachlor was not selective to the common bean, while dimethenamid, S-metolachlor, pendimethalin, and trifluralin were selective when sprayed up to the maximum rate. The level of selectivity of dimethenamid and S-metolachlor varied with the rate applied, while the level of selectivity of trifluralin and pendimethalin did not change.
%K Phaseolus vulgaris
%K tolerancia
%K pr谷-emerg那ncia
%K Phaseolus vulgaris
%K tolerance
%K pre-emergence
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200019