Effect of extracts of spontaneous plants on germination and early growth of the common bean
Keywords:
Phaseolos vulgaris L., Cyperus rotundus L., Bidens pilosa L., AllelopathyAbstract
The common bean suffers intense interference from spontaneous plants, resulting in serious damage to growth, yield and harvest operations. The aim of this study was to evaluate the effect of plant extracts of tiririca (Cyperus rotundus) and picão-preto (Bidens pilosa) on germination and early growth of bean plants. Five treatments which consisted of been seeds with different extracts were evaluated: tiririca (aqueous and ethanol extract), picão-preto (aqueous and ethanol extract) and control (water only). The application of ethanolic extracts inhibited the germination of bean. The aqueous extract of tiririca presents effect on the number of bean leaves after 35 days, while the aqueous extract of picão preto negatively affects germination and early growth. These results suggest that picão-preto can negatively affect the development and productivity of common bean, probably due to biochemical interactions
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