SELETIVIDADE DE ESPÉCIES BROMELIÁCEAS A HERBICIDAS INIBIDORES DO FOTOSSISTEMA II

bromacil nas doses de 0,0 (testemunha); (1,0 + 1,0) ; (2,0 + 2,0) e (3,0 + 3,0) kg ha -1 e para o abacaxi, das misturas diuron + bromacil ((2,0 + 2,0 ) kg ha -1 ), diuron + ametryn (1,5 + 1,5 kg ha -1 ), e diuron + bromacil + ametryn (2,0 + 2,0 + 0,5 k g ha -1 ) e testemunha. Verificou-se que diuron + bromacil apresentou potencial seletivo ao curaua, principalmente para a variedade "Roxo". As misturas diuron + bromacil, diuron + ametryn e diuron + bromacil + ametryn reduziram a altura e materia seca da folhas D e E d o abacaxi "MD-II Gold", caracterizando baixa seletividade da especie. Abstract: The work aimed to evaluate the tolerance of bromeli aceous species to post- emergency application of formulated and tank mixtures of photo system II inhibitors herbicides. Two experiments were developed with Ananas erectifolius specie, "Purple" and "White" genotypes, and Ananas comosus specie , "MD-II Gold" genotype. Four treatments and five repetitions were used in randomized entire ly scheme, with experimental plots constituted by vases with two plants for A. erectifolius genotypes and only one plant for A. comosus . For the first specie, treatments were constituted by diuron + bromacil in doses of: 0.0 (check); (1.0 + 1.0); (2.0 + 2.0) and (3.0 + 3. 0) kg ha -1 , and for A. comosus , the mixtures of diuron + bromacil ((2.0 + 2.0) kg ha -1 ), diuron + ametryn (1.5 + 1.5 kg ha -1 ), and diuron + bromacil + ametryn (2.0 + 2.0 + 0.5 kg ha -1 ) and check were studied. It was verified that diuron + bromacil showed selective potential to A. erectifolius , mainly for "Purple" genotype. Diuron + bromacil, diuron + ametryn and diuron + bromacil + ametryn mixtures reduced, significantly, plant height and dry matter of D and E leaves for A. comosus , specie "MD-II Gold" genotype, characterizing low selectivity of t his specie.