Chromolaena odorata - Knowledge (XXG)

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is a rapidly growing perennial herb. It is a multi-stemmed shrub which grows up to 2.5 m (100 inches) tall in open areas. It has soft stems but the base of the shrub is woody. In shady areas it becomes etiolated and behaves as a creeper, growing on other vegetation. It can then become up to 10 m (33

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and are somewhat hairy. They are mostly spread by the wind, but can also cling to fur, clothes and machinery, enabling long-distance dispersal. Seed production is about 80,000 to 90,000 per plant. Seeds need light to germinate. The plant can regenerate from the roots. In favorable conditions the

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Raimundo, R. L. G., R. L. Fonseca, R. Schachetti-Pereira, A. T. Peterson & Thomas Michael Lewinsohn, 2007.Native and Exotic Distributions of Siamweed (Chromolaena odorata) Modeled Using the Genetic Algorithm for Rule-Set Production. Weed Science, 55 (1): 41–48 |

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Cruz, Z.T., Muniappan, R., Reddy, G.V.P. (2007). Establishment of Cecidochares connexa (Diptera: Tephritidae) in Guam and Its Effect on the Growth of Chromolaena odorata (Asteraceae). Annals of the Entomological Society of America.

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forms galls around the fly larvae that become a nutrient sink that diverts energy away from plant growth to provide nutritive tissue along the walls of the larval chamber. Between 1 and 7 larvae can be found in each gall.

725:(Sri Lanka). In Western Africa the plant was accidentally introduced with forestry seeds. It was introduced as an ornamental in Southern Africa, and was introduced to Ivory Coast in 1952 to control 1378:

Gade, S; Rajamanikyam, M; Vadlapudi, V; et al. (2017). "Acetylcholinesterase inhibitory activity of stigmasterol & hexacosanol is responsible for larvicidal and repellent properties of

428: 660:. In Western Africa it prevents regeneration of tree species in areas of shifting cultivation. It affects species diversity in southern Africa. The plant's flammability affects forest edges. 1214: 656:

weed of field crops and natural environments in its introduced range. It has been reported to be the most problematic invasive species within protected rainforests in

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Gunasekera, L. (2009). Invasive Plants: A guide to the identification of the most invasive plants in Sri Lanka. Colombo. 116-117

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Common names include Siam weed, rouge plant, Christmas bush, jack in the box, devil weed, common floss flower, hagunoy (

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and the leaves give off a pungent, aromatic odour when crushed. The leaves are opposite, triangular to elliptical with

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grasses. It was first found in Queensland, Australia in 1994 and was perhaps introduced with foreign pasture seeds.

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is toxic to cattle and is larvicidal against all major mosquito vectors. It can also cause allergic reactions.

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