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Asian Journal of Plant Sciences
Year: 2004  |  Volume: 3  |  Issue: 6  |  Page No.: 696 - 700

Effects of Hearleaf Cocklebur (Xanthium strumarium L.) Extract on Some Crops and Weeds

Izzet Kadioglu    

Abstract: This study was conducted to determine possible allelopathic and herbicidal effects of ground plant tissues and leaves-flowers and seed extracts of hearleaf cocklebur (Xanthium strumarium L.) on some crops and weeds. Experiments were repeated twice in 2003 and 2004 using organs and seeds of hearleaf cocklebur were collected in the Spring of 2002. Seedling studies were carried out in the laboratory with extract of hearleaf cocklebur in 9 cm diameter petri dishes and in greenhouse in pots 12x16 dimension pots. In the laboratory, hearleaf cocklebur had no allelopathic effect on the seeds of Daucus carota L., Descurania sophia (L.) Webb. Ex Prant., Abutilon theophrastii Medik. and Lepidium sativum L.. However, it inhibited the germination considerably in Triticum vulgare L., Hordeum vulgare L., Lolium perenne L. and Avena sterilis L. Effect of hearleaf cocklebur on the plants growth in the pots in post-emergence ranged from 0.00% to 86.66%. The herbicidal effects of hearleaf cocklebur was high in Amaranthus retroflexus L., Papaver somniferum L. and D. sophia. The inhibitory effect of ground hearleaf cocklebur on A. retroflexus, A. sterilis and Conium maculatum L. was greater than on the other plant species used in this study.

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