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

Leandro Kenji Takao, Jose Pedro Nepomuceno Ribeiro, Maria Inês Salgueiro Lima
2011 Acta Botânica Brasílica  
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
more » ... 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.
doi:10.1590/s0102-33062011000400012 fatcat:ffy7uk464vbr7gimgwk4o7qnee