Seletivicty of eucalyptus genotypes to herbicides rates

Dirceu Agostinetto, Camila Peligrinotti Tarouco, Catarine Markus, Ezequiel de Oliveira, José Matheus Betemps Vaz da Silva, Siumar Pedro Tironi

Abstract


The aim of this work was to quantify the herbicide selectivity applied at post-emergence of eucalyptus in different rates. The experiment was conducted in greenhouse conditions in the period from January to March 2007 at the Faculdade de Agronomia Eliseu Maciel in Universidade Federal de Pelotas – Capão do Leão-RS. Experimental design was completely randomized, with four replications. Treatments were in a factorial scheme: factor A - eucalyptus genotypes (E. globulus e E. saligna), factor B - herbicides (isoxaflutole, oxyfluorfen, bispyribac-sodium and sethoxydim+diclosulam), and factor C – rates of the registered average for weed control (0, 50, 100, 150 e 200%). Phytotoxicity, height, stem diameter and dry matter were evaluated. E. globulus genotype was more sensitive to herbicides than E. saligna. The mixture of the herbicides sethoxydim plus diclosulam showed potential to be used in eucalyptus. Bispyribac-sodium herbicide was the most toxic and isoxaflutole was the most selective to the studied genotypes.


Keywords


Eucalyptus spp.; Tolerance; Phytotoxicidade



DOI: http://dx.doi.org/10.5433/1679-0359.2010v31n3p585

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional