Allelochemic Effects of Leaf Extracts of Ambrosia trifida (Compositae)
Aqueous extracts from leaves of giant ragweed reduced growth in sorghum seedlings, and reduced germination in sorghum and radish. Five phenolic compounds from these extracts were isolated and characterized, but not identified. Germination bioassays using these compounds demonstrated that each of the five depressed germination, and the depression related to concentration. It is suggested that the water-soluble allelochemics from giant ragweed contribute to any interference effect this weed may have on growth of associated species.
sorghum, seed germination, radishes, seedlings, bioassay, acid soils, organic soils, plant growth
Rasmussen, James A., and Frank A. Einhellig. "Allelochemic effects of leaf extracts of Ambrosia trifida (Compositae)." The Southwestern Naturalist (1979): 637-643.
The Southwestern Naturalist