Allelopathic effects of Ipomoea cairica (L.) Sweet on crop weeds

Acta Botanica Brasilica

Leandro Kenji Takao¹  Jose Pedro Nepomuceno Ribeiro¹  Maria Inês Salgueiro Lima¹ 

[1] ,Universidade Federal de São Carlos Programa de Pós-Graduação em Ecologia e Recursos Naturais Laboratório de Sistemática e Ecologia QuímicaSão Carlos SP ,Brasil

关键词: allelopathy;    Bidens pilosa;    Echinochloa crus-galli;    Euphorbia heterophylla;    Ipomoea grandifolia;    alelopatia;    Bidens pilosa;    Echinochloa crus-galli;    Euphorbia heterophylla;    Ipomoea grandifolia;   

DOI  :  10.1590/S0102-33062011000400012

来源: SciELO

【 摘 要 】

Identification of species with allelopathic potential has been a target of researches aiming to use them to control crop weeds. Ipomoea cairica is considered a weed with allelopathic potential, which has already been reported. The goal of this study was to evaluate the allelopathic properties of leaf extracts from Ipomoea cairica on the germination and early development of four of the worst crop weeds in Brazil: Bidens pilosa L., Echinochloa crus-galli (L.) Beauv., Euphorbia heterophylla L. and Ipomoea grandifolia (Dammer) O´Donel. We tested the effects of leaf extracts, in four concentrations, on the germination and early development of these species. The extracts negatively affected the germination, early development and the morphology of all target species, and the phytotoxic effect was higher as the concentration of the extracts increased. The influence of the I. cairica extracts on germination, in addition to their effects on seedling development, made them more effective.

【 授权许可】

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