Seletivicty of eucalyptus genotypes to herbicides rates
DOI:
https://doi.org/10.5433/1679-0359.2010v31n3p585Keywords:
Eucalyptus spp., Tolerance, PhytotoxicidadeAbstract
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.
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