Agricultural Research

, Volume 8, Issue 4, pp 461–466 | Cite as

The Role of Tillage, Allelopathy, Dormancy-Breaking Mechanisms and Wind in the Spread of Purple Nutsedge (Cyperus rotundus) in Zimbabwe

  • Musabayana Zivanai
  • Mandumbu RonaldEmail author
  • Mashingaidze Nester
Full-Length Research Article


Purple nutsedge (Cyperus rotundus) is an invasive weed in tropical cultivated lands and propagates through tubers, rhizomes, seed and corms. Weedy invasive plants have unique functional traits that enable their invasiveness. The objectives of this study were to determine the drivers of the purple nutsedge invasion in the Zimbabwe’s agricultural systems among allelopathy, dispersal and dormancy-breaking mechanisms. Three experiments were carried out each in the laboratory, greenhouse and field. All the experiments were in completely randomised design replicated six times. Results showed that purple nutsedge leaf, stem and tuber extracts successfully (P < 0.001) inhibited germination and radical extension of Sorghum bicolor. Cutting the seed, which mimics the plough action on tubers gave the highest (P < 0.05) sprouting compared to exposure to freezing temperatures. There was a direct relationship between dispersal distance and wind speed (R2 = 0.907). The purple nutsedge plants attached to the plough were related (R2 = 0.515) to the number of plough passes. This study confirmed that allelopathy, easiness for dispersal and dormancy-breaking by the cutting action of the plough were the drivers of the weed’s invasiveness. Therefore, allelopathy, ploughing, dispersal by wind and plough contribute to invasiveness of the weed.


Allelopathy Dispersal Dormancy Invasive Tillage 



The authors would like to thank staff at Grasslands Research Station and the Meteorological Services Department for providing sites for the experiments.


This research did not receive any specific grant from funding agencies in the public, commercial or not-for-profit sectors.

Compliance with Ethical Standards

Conflict of interest

There is no conflict of interest to declare.


  1. 1.
    Alsaadawi IS, Salih NMM (2009) Allelopathic potential of Purple nutsedge L 11. Isolation and identification f phytotoxins. Allelopath J 24:85–90Google Scholar
  2. 2.
    Baker HG (1965) Characteristics and modes of origins of weeds. In: Baker HG, Stebbins GL (eds) The genetics of colonising spp. Academic Press, New York, pp 147–172Google Scholar
  3. 3.
    Brahima K, Toure A, Amadji GL, Yao-Kouame Angui PT, Huat J (2013) Soil characteristics and Cyperus spp. occurrence along a troposphere. Afr J Ecol 51:402–408CrossRefGoogle Scholar
  4. 4.
    Chivinge OA (1990) Weed science technological needs for the communal areas of Zimbabwe. Zambazia XVII(II):133–143Google Scholar
  5. 5.
    Dekker J (2011) Evolutionary ecology of weeds.
  6. 6.
    Halvorson WL, Guertin T (2003) Weeds in the West project: status of introduced plants in southern Arizona parks. Factsheet for: Pennisetum setaceum (Forsk.) Chiov. Tucson, AZ, USA: US Geological Survey. Accessed 30 Nov 2017
  7. 7.
    Horowtz M (1992) Mechanisms of establishment and spreading of purple nutsedge-the worst weed in the region. Proc First Int Weed Control Congress 1:94–97Google Scholar
  8. 8.
    Iqbal J, Hussain S, Ali A, Javaid A (2012) Biology and management of purple nutsedge (Cyperus rotundus). J Plant Anim Sci 22(2):384–389Google Scholar
  9. 9.
    Morimoto RK, Komai K (2005) Plant growth inhibitors: Pachtoleene type sesquintine from Purple nutsedge. Weed Biol Manag 5:203–209CrossRefGoogle Scholar
  10. 10.
    Nishimoto RK (2001) Purple nutsedge tuber sprouting. Weed Biol Manag 1:203–308CrossRefGoogle Scholar
  11. 11.
    Oyun MB (2006) Allelopathic potentialities of Gliricidia sepium and Acacia auricliformis on the germination and seedling vigour of maize. Am J Agric Biol Sci 3:44–47CrossRefGoogle Scholar
  12. 12.
    Pysek P, Richardson DM (2007) Traits associated with invasiveness in alien plants. In: Nentwi W (ed) Where do we stand for? In Biological Invasions. Springer, New York, pp 95–125Google Scholar
  13. 13.
    Schippers P, Ter Borg SJ, Goenendael JM, Habekotte B (1993) What makes Cyperus esculentus invasive species? A spatial model approach. Proc Brighton Crop Prot Conf 2:495–504Google Scholar
  14. 14.
    Silveira HRO, Ferraz EO, Matos CC, Alvarenga ICA, Guilherme DO, Martins ER (2010) Allelopathy and homeopathy in the management of nutsedge C(C rotundus). Planta Daninha 28:499–506CrossRefGoogle Scholar
  15. 15.
    Sutherland S (2004) What makes a weed a weed: life history traits of native and exotic plants in the USA. Oecologia 141:24–39CrossRefGoogle Scholar
  16. 16.
    Webster TM (2003) High temperature and durations of exposure reduce nutsedge (Cyperus spp) tuber viability. Weed Sci 56:735–742CrossRefGoogle Scholar
  17. 17.
    Yu JQ, Ye SF, Zhang MF, Hu WH (2003) Effects of root exudates and aqueous root extracts of cucumber (Cucumis sativus) and allelochemicals on photosynthesis and antioxidant enzymes in cucumber. Biochem Syst Ecol 3:129–139CrossRefGoogle Scholar

Copyright information

© NAAS (National Academy of Agricultural Sciences) 2018

Authors and Affiliations

  1. 1.Department of AgronomyMidlands State UniversityGweruZimbabwe
  2. 2.Department of Crop ScienceBindura University of Science EducationBinduraZimbabwe

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