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The Allelopathic Effect of Eucalyptus Leaf Extract on Grass Forage Seed

Authors :
F.P. Carvalho
C.A.D. Melo
M.S. Machado
D.C.F.S. Dias
E.M. Alvarenga
Source :
Planta Daninha, Vol 33, Iss 2, Pp 193-201 (2015)
Publication Year :
2015
Publisher :
Sociedade Brasileira da Ciência das Plantas Daninhas, 2015.

Abstract

This study aimed to evaluate the allelopathic effect of various concentrations of an aqueous extract of eucalyptus leaves on Urochloa decumbens and Panicum maximum seeds. The extract was prepared from Eucalyptus urograndis leaves that were milled and mixed with distilled water in a 1:9 milled leaves: water ratio to obtain an extract with a defined concentration of 100%. In addition, dilutions of 50%, 25% and 12.5% were prepared, and a 0% dilution was used as a control. The experiment followed a completely randomized design, with four replicates, each of 50 seeds of U. decumbens and 50 seeds of P. maximum, arranged on filter paper moistened with each concentration of extract in a Gerbox plastic box. The results demonstrated the allelopathic potential of E. urograndis aqueous extracts applied to the seeds of U. decumbens and P. maximum. The 50% and 100% concentrations of leaf extract most strongly inhibited the germination, vigor and seedling growth of U. decumbens and P. maximum. The germination speed index and the root length were the characteristics that were most affected by the potentially allelopathic substances contained in the eucalyptus extracts at all concentrations.

Details

Language :
English, Spanish; Castilian, Portuguese
ISSN :
01008358
Volume :
33
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Planta Daninha
Publication Type :
Academic Journal
Accession number :
edsdoj.2867b0c44e7545f7a29f1e00c04e9d2c
Document Type :
article
Full Text :
https://doi.org/10.1590/0100-83582015000200004