Research on allelopathic effects of Conyza canadensis-an invasive species

Abstract

Abstract: Allelopathic effects of aqueous extracts from C. canadensis were tested with apetri dish cultivation methods. They strongly inhibited the germination and seedling growth of Cucumis sativus, Brassica campestris, Digitaria sanguinalis, Echinochloa crusgalli and Amaranthus retroflexus. B. campestris was more sensitive than the other species. At 0.025 0 g/mL the germination of B. campestris, A. retroflexus, D. sanguinalis, C. sativus and E. crusgalli were 0, 6.67%, 9.09%, 40.00%, and 50.00%, respectively. The germination speed reflected the germination percentage, but was more sensitive. The roots were inhibited more strongly than seedling height at the same concentrations.

CLC Number:

Q945

GAO Xing-xiang, LI Mei, GAO Zong-jun, SUN Ting-lin, SUN Zuo-wen. Research on allelopathic effects of Conyza canadensis-an invasive species[J]. Acta Prataculturae Sinica, 2009, 18(5): 46-51.

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