Chromolaena odorata in slash-and-burn rice systems of Northern Laos

Röder, W.; Phengchanh, S.; Keoboualapha, Bounthanh; Maniphone, S.

doi:10.1007/bf00712056

Cited by 42 publications

(41 citation statements)

References 4 publications

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“…The inability to detect DME in soil water in natural stands; however, led them to conclude that S. altissimo has little allelopathic activity in the field. The allelopathic effects of chromolaena in laboratory studies (Hoque et al 2003) is not repeated under natural conditions, where it is an important species in fallow-cropping systems in Africa and Asia (Roder et al 1995;Koutika et al 2002;Ikuenobe and Anoliefo 2003) and is perceived amongst farmers to be a beneficial plant rather than a noxious weed.…”

Section: Discussionmentioning

confidence: 99%

Does allelopathy explain the invasiveness of Campuloclinium macrocephalum (pompom weed) in the South African grassland biome?

et al. 2010

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Campuloclinium macrocephalum is an Asteraceous alien weed that invades roadside vegetation and grassland in South Africa. The role of allelopathy and competition in its invasiveness was investigated using Eragrostis curvula (weeping lovegrass, an indigenous grass), E. tef and Lactuca sativa (lettuce) as test species. Trials were conducted in Petri-dishes, pots and in the field. Root and shoot extracts of adult C. macrocephalum plants did not inhibit seed germination in any test species. The greatest effect was radicle stunting produced by leaf extracts at 10 and 25% w/v. Eragrostis curvula was less tolerant of the extracts than E. tef. Allelopathic effects could however not be confirmed in pot trials evaluating the interference potential of the weed or weed residue effects against E. curvula. E. curvula growth and biomass was not affected by plant densities of one or five C. macrocephalum per pot, whereas C. macrocephalum suffered a 17% mortality and density-dependant trade-offs of size and biomass for survival. Under field conditions C. macrocephalum had a broader ecological niche than E. curvula, invading hygrophilous and undisturbed grasslands not amenable for E. curvula establishment, this included well drained disturbed soils on which the latter proliferated. Evidence of competitive exclusion of E. curvula by C. macrocephalum or vice versa was not detected. The coexistence of both species irrespective of relative density suggested these species have different resource requirements. Allelopathy was not an adequate causal mechanism to explain invasiveness in Campuloclinium macrocephalum. A more traditional hypothesis such as the absence of natural enemies, at this stage, better justifies the weed's invasion success.

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Section: Discussionmentioning

confidence: 99%

Does allelopathy explain the invasiveness of Campuloclinium macrocephalum (pompom weed) in the South African grassland biome?

et al. 2010

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“…During this process, different plant species immediately invade the area, and the commonest is Chromolaena odorata otherwise referred in this part of the country as "Awolowo". C. odorata according to Roder et al, (1995), Koutika and Rainey (2010) is a member of the family Asteraceae, a perennial shrub forming dense tangled bushes of about 1.5 -2.0 m in height, sometimes reaching 6 m. C. odorata is characteristically a plant of secondary succession that invades fallows or newly cleared lands, and is often shaded out when forest trees and shrubs are fully established.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Nutrient Status of Soil under <em>Chromolaena odorata</em> L. (Siam Weed) Fallow in Moniya, Oyo State Southwestern Nigeria

Imiolemen¹,

Iwara²,

Ndakara³

et al. 2012

Ethiop. J. Env Stud & Manag

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“…Thus, some farmers of Laos found it relatively easy to remove C. odorata from the young plants when it regrew from rootstock after burning. They said that C. odorata growing from seeds had a comparatively low initial growth phase and was not a big problem in the initial growth stage of the rice plant (Roder et al, 1995). Furthermore, even though C. odorata accounted for 48% of total biomass after the first year of fallow against 37% fallow tree and bamboo species, plant density and percent contribution declined in the second year of fallow in northern Laos (Roder et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

“…They said that C. odorata growing from seeds had a comparatively low initial growth phase and was not a big problem in the initial growth stage of the rice plant (Roder et al, 1995). Furthermore, even though C. odorata accounted for 48% of total biomass after the first year of fallow against 37% fallow tree and bamboo species, plant density and percent contribution declined in the second year of fallow in northern Laos (Roder et al, 1995). Similarly, C. odorata contributed 80% of the canopy cover and was the dominant fallow species (Roder et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Chromolaena Odorata in Different Ecosystems: Weed or Fallow Plant?

KOUTIKA¹

2010

Appl Ecol Env Res

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Abstract.To understand the use of Chromolaena odorata in different agricultural systems and ecosystems, findings of several scientific studies conducted in different areas have been assessed in this review paper. Some authors considered C. odorata as a serious weed because of its ability: to regenerate and colonize uninvaded areas; to be a threat to some ecosystems and environment; to reduce the biodiversity of grasslands, savannahs and forests; and to be a considerable problem in commercial tree plantations as it suppresses the growth of young pine and eucalypt trees. Others argued that the species may be considered as a beneficial fallow plant rather than a weed, because it may be considered as a welcome plant rather than a weed in some agricultural systems, when considering the expected properties of species for fallow improvement. The following are the main reasons why C. odorata is considered as a fallow because of it ability: to be a nutrient sink and its potential benefit to the crop as regular source of organic matter and nutrients after slashing; to have a beneficial effect on exchangeable K concentration; to be used as green manure; to be better adapted as a fallow plant on acidic soils than some leguminous.

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Chromolaena odorata in slash-and-burn rice systems of Northern Laos

Cited by 42 publications

References 4 publications

Does allelopathy explain the invasiveness of Campuloclinium macrocephalum (pompom weed) in the South African grassland biome?

Does allelopathy explain the invasiveness of Campuloclinium macrocephalum (pompom weed) in the South African grassland biome?

Assessment of the Nutrient Status of Soil under <em>Chromolaena odorata</em> L. (Siam Weed) Fallow in Moniya, Oyo State Southwestern Nigeria

Chromolaena Odorata in Different Ecosystems: Weed or Fallow Plant?

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