Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide


Cuscuta europaea
(European dodder)



Cuscuta europaea (European dodder)


  • Last modified
  • 21 November 2019
  • Datasheet Type(s)
  • Invasive Species
  • Pest
  • Natural Enemy
  • Preferred Scientific Name
  • Cuscuta europaea
  • Preferred Common Name
  • European dodder
  • Taxonomic Tree
  • Domain: Eukaryota
  •   Kingdom: Plantae
  •     Phylum: Spermatophyta
  •       Subphylum: Angiospermae
  •         Class: Dicotyledonae
  • Summary of Invasiveness
  • C. europaea has not proved to be a highly invasive species, but there are very significant risks of accidental introduction with contaminated crop seed and any such introduction could cause serious crop damage, and prejudice options for trading crop...

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C. europaea flowering on Artemisia vulgaris. Bhutan, 1991.
TitleFlowering stage
CaptionC. europaea flowering on Artemisia vulgaris. Bhutan, 1991.
Copyright©Chris Parker/Bristol, UK
C. europaea flowering on Artemisia vulgaris. Bhutan, 1991.
Flowering stageC. europaea flowering on Artemisia vulgaris. Bhutan, 1991.©Chris Parker/Bristol, UK
C. europaea: close-up of flowers on Artemisia vulgaris. Bhutan, 1991.
CaptionC. europaea: close-up of flowers on Artemisia vulgaris. Bhutan, 1991.
Copyright©Chris Parker/Bristol, UK
C. europaea: close-up of flowers on Artemisia vulgaris. Bhutan, 1991.
FlowersC. europaea: close-up of flowers on Artemisia vulgaris. Bhutan, 1991.©Chris Parker/Bristol, UK


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Preferred Scientific Name

  • Cuscuta europaea L. (1753)

Preferred Common Name

  • European dodder

Other Scientific Names

  • Cuscuta halophyta Fr. (1832)
  • Cuscuta laxiflora Aznav., non Benth. (1905)
  • Cuscuta major DC. (1671)
  • Cuscuta viciae W.D.J. Koch, Schnitzl. & Schönh. (1853)

International Common Names

  • English: greater dodder
  • French: cuscute d'Europe

Local Common Names

  • China: ou zhou to si zi
  • Czech Republic: kokotice evropska
  • Germany: Europäische Seide
  • Italy: cuscuta
  • Japan: kushironenashikazura
  • Netherlands: groot warkruid
  • Spain: cabellos de venus
  • Sweden: naesselsnaerja

EPPO code

  • CVCEU (Cuscuta europaea)

Summary of Invasiveness

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C. europaea has not proved to be a highly invasive species, but there are very significant risks of accidental introduction with contaminated crop seed and any such introduction could cause serious crop damage, and prejudice options for trading crop produce.

Taxonomic Tree

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  • Domain: Eukaryota
  •     Kingdom: Plantae
  •         Phylum: Spermatophyta
  •             Subphylum: Angiospermae
  •                 Class: Dicotyledonae
  •                     Order: Solanales
  •                         Family: Cuscutaceae
  •                             Genus: Cuscuta
  •                                 Species: Cuscuta europaea

Notes on Taxonomy and Nomenclature

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While the genus Cuscuta is still considered here to belong in the distinct family Cuscutaceae, the parasitic plant website Parasitic Plant Connection (2003) places Cuscuta in the sub-family Cuscutoideae within Convolvulaceae and the validity of this has recently been supported by Stefanovich et al. (2002) who conclude from DNA studies that Cuscuta is 'nested within Convolvulaceae' and should not be separated into its own family.

Many synonyms have been applied to C. europaea, but none are any longer in common use. Yuncker (1932), who lists many synonyms, recognizes two varieties, var. indica and var. conocarpa, but Feinbrun (1970) concludes that although the species shows some variation it is not sufficiently consistent to allow delineation of subspecies or varieties.


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Cuscuta species are obligate parasites with negligible chlorophyll and leaves reduced to minute scales on a glabrous stem which twines around the shoots and leaves of suitable host plants. In C. europaea the stems are yellowish, orange or reddish, filiform, about 1 mm in diameter. Inflorescences are lateral, compact clusters, about 10 mm diameter, of few to many flowers each on pedicels up to 1.5 mm. Calyx cup-shaped with 4 or 5 sepals, triangular ovate, obtuse, about 1.5 mm long. Corolla of 4 or 5 triangular-ovate lobes, pink, 2.5-3 mm long, often reflexed. Stamens have filaments longer than the ovate-circular anthers. Scales very thin obovate, 2-cleft or entire. Styles 2 with filiform divergent stigmas about as long as the styles. Mature capsule capped by the withered corolla, sub-globose, about 3 mm in diameter, circumscissile. Seeds usually 4, pale brown, elliptic, about 1 mm, scabrous (from Fang Rhui-cheng et al., 1995).

Fritsche et al. (1958) provide detailed descriptions of the anatomy and morphology of C. europaea.

Plant Type

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Seed propagated
Vegetatively propagated
Vine / climber


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C. europaea has a much wider native distribution than its name implies, occurring through much of south temperate Asia, to India, Pakistan, Afghanistan and China, as well as being widely distributed in Europe.

Distribution Table

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The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.

Last updated: 21 Jul 2022
Continent/Country/Region Distribution Last Reported Origin First Reported Invasive Reference Notes




BhutanPresent, LocalizedNative
ChinaPresentPresent based on regional distribution.
-HebeiPresentNativeOriginal citation: Wang et al. (1990)
-Inner MongoliaPresentNative
-Jammu and KashmirPresentNative
-Uttar PradeshPresent


Federal Republic of YugoslaviaPresentNative
RussiaPresentPresent based on regional distribution.
-Central RussiaPresentNative
-Eastern SiberiaPresentNative
-Northern RussiaPresentNative
-Russian Far EastPresentNative
-Southern RussiaPresentNative
-Western SiberiaPresentNative
United KingdomPresentNative

North America

United StatesPresentPresent based on regional distribution.


New ZealandPresent, LocalizedIntroduced

History of Introduction and Spread

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Occurrence of C. europaea in N. America must be a result of introduction but its history is not readily traced.

Risk of Introduction

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All Cuscuta species are frequently listed as prohibited, quarantine species. Holm et al. (1997) indicate that 25 countries have declared Cuscuta spp. as noxious, and that the movement of Cuscuta-infested material is prohibited in every state of the USA.

Dry heat at 100°C for 15 minutes has been shown to selectively kill seeds of Cuscuta spp. in nigerseed (Guizotia abyssinica) (Strasser, 1988) providing a means of de-contaminating contaminated imports, but it is not certain that this is being used in practice.


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C. europaea occurs on a wide range of hosts over a considerable range of soils and climates, temperate and sub-tropical. Provided suitable hosts are present there seems little to restrict its distribution outside the tropics.

Habitat List

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Terrestrial ManagedCultivated / agricultural land Present, no further details Harmful (pest or invasive)
Terrestrial ManagedDisturbed areas Present, no further details Harmful (pest or invasive)
Terrestrial ManagedRail / roadsides Present, no further details Harmful (pest or invasive)
Terrestrial ManagedUrban / peri-urban areas Present, no further details Harmful (pest or invasive)
Terrestrial Natural / Semi-naturalRiverbanks Present, no further details Harmful (pest or invasive)
Terrestrial Natural / Semi-naturalWetlands Present, no further details Harmful (pest or invasive)

Hosts/Species Affected

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Although C. europaea is recorded as a serious weed in several countries (Holm et al., 1979), the range of crops affected is not well documented. Recent literature confirms sugarbeet as a major host in Italy (Rapparini and Campagna, 1998). It is otherwise recorded as occurring on a wide range of hosts with little apparent host specificity, though Urtica dioica is noted as a particularly favoured host (Koskela et al., 2001) and Fang Rhui-cheng et al. (1995) indicate Asteraceae, Fabaceae and Chenopodiaceae as the families most affected. In Lithuania, it occurs on 34 plant species, the most intensive growth being observed on Urtica dioica, Aegopodium podagraria, Fraxinus excelsior, Lamium album, Solidago canadensis and raspberry. Almost 3 times as many, and also larger, inflorescences were observed on U. dioica than on raspberry and A. podagraria (Gal'vidis, 1993).

Host Plants and Other Plants Affected

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Plant nameFamilyContextReferences
Aegopodium podagraria (ground elder (UK))ApiaceaeWild host
Allium cepa (onion)LiliaceaeMain
Alnus (alders)BetulaceaeWild host
Artemisia vulgaris (mugwort)AsteraceaeWild host
Astragalus stipulatusFabaceaeWild host
Beta vulgaris (beetroot)ChenopodiaceaeMain
Crataegus monogyna (hawthorn)RosaceaeWild host
Humulus lupulus (hop)CannabaceaeOther
Mentha (mints)LamiaceaeWild host
Rubus idaeus (raspberry)RosaceaeOther
Salix (willows)SalicaceaeWild host
Urtica dioica (stinging nettle)UrticaceaeWild host
Vicia faba (faba bean)FabaceaeOther
Vicia sativa (common vetch)FabaceaeOther

Growth Stages

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Flowering stage, Fruiting stage, Vegetative growing stage

Biology and Ecology

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Chromosome number 2n = 14.

Physiology and Phenology

Cuscuta species are obligate parasites with negligible chlorophyll, totally dependent on attachment to a host plant within a few days after germination. Germination does not depend on the presence of host plants but occurs over a prolonged period as there is a proportion of hard-coated seeds which gradually become permeable and allow absorption of water. This ensures that not too many seeds germinate at one time in the possible absence of a potential host plant. In many species, there is also an innate dormancy which is broken by chilling over the winter. In eastern Lithuania, germination of C. europaea was shown to be abundant after rain at the end of May and beginning of June when the sum of effective temperatures exceeded 250°C (Gal'vidis, 1993). On germination a very short root is formed which provides anchorage only, while the plumule elongates rapidly and, in the light, circumnutates widely anticlockwise until contact is made with a stem or other solid object. The length of the seedling rarely exceeds 10 cm and if a host is not located, the seedling dies within a few days. Once contact with a stem or other object is made, the shoot will twine around it, whether living or inanimate and the root and shoot base below this point will soon die. The coiling action requires blue or far-red light and is suppressed under red light or darkness. If a suitable host stem is found, several coils will develop, with pre-haustorial swellings on the inner face of the coiled stem, from which full haustoria develop in the presence of cytokinins, which derive partly from the parasite and partly from the host. Intrusive organs develop from the haustorium and searching hyphae penetrate the host tissues by a combination of separation and penetration of cells (these processes are reviewed by Parker and Riches, 1993). Connections are then formed by a bridge of tracheids with the host xylem, while connection with the phloem via plasmodesmata between searching hyphae and host parenchyma cells has also been confirmed by Dorr (1987). Once the haustorial connection is complete, new shoot buds develop close by. While some Cuscuta species, notably C. reflexa, have measurable levels of chlorophyll and photosynthesis, Machado and Zetsche (1990) failed to find either in C. europaea, and further development is completely at the host's expense.

Vegetative growth may continue for some time before any flowers are formed, or flowering may occur very rapidly. Flowering is thought by some authors to be linked to the flowering of the host plant but this is not apparently consistent.

Fritsche et al. (1958) provide detailed observations on the growth and flowering of C. europaea.

Reproductive Biology

Cuscuta species are propagated mainly by seed, though individual plants may spread vegetatively over many separate host plants. Stem fragments may also be able to establish new plants, though it is not known whether this can occur with C. europaea.

There are no specialized dispersal methods for Cuscuta species and without the assistance of man or animals, it is presumed to depend on soil or water movement (Dawson et al., 1994.)

Environmental Requirements

The mainly temperate distribution of C. europaea suggests that this species is dependent on a cool or cold winter period for 'stratification' and breakage of seed dormancy. There is no evidence of association with particular soil types, or level of soil fertility, nor any requirement for especially moist or dry conditions.

Latitude/Altitude Ranges

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Latitude North (°N)Latitude South (°S)Altitude Lower (m)Altitude Upper (m)
0 0 0 0

Air Temperature

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Parameter Lower limit Upper limit
Mean annual temperature (ºC) 8 22
Mean maximum temperature of hottest month (ºC) 17 39
Mean minimum temperature of coldest month (ºC) -10 9


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ParameterLower limitUpper limitDescription
Dry season duration09number of consecutive months with <40 mm rainfall
Mean annual rainfall2501200mm; lower/upper limits

Rainfall Regime

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Soil Tolerances

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Soil drainage

  • free
  • impeded

Soil reaction

  • acid
  • alkaline
  • neutral

Soil texture

  • heavy
  • light
  • medium

Special soil tolerances

  • infertile
  • shallow

Natural enemies

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Natural enemyTypeLife stagesSpecificityReferencesBiological control inBiological control on
Melanagromyza cuscutae Herbivore Fruits|pods; Plants|Stems
Smicronyx ghanii Herbivore Plants|Stems
Smicronyx jungermanniae Herbivore Plants|Stems
Smicronyx parafasciatus Herbivore Plants|Stems
Smicronyx tartaricus Herbivore Plants|Stems

Notes on Natural Enemies

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A number of insects are known to attack Cuscuta species. Melanagromyza cuscutae is a fly whose larvae mine the stems, and attempts to use this species as a means of biological control of C. europaea by augmentative release have been made in Kazakhstan (Julien and Griffiths, 1998). A number of the gall-forming Smicronyx species attack many species of Cuscuta, and S. jungermanniae and S. tartaricus are both recorded on C. europaea in Kazakhstan and in the former Yugoslavia (Shinkarenko, 1982b; Parker and Riches, 1993). Shinkarenko (1982a) records a wider range of insects attacking a number of Cuscuta spp. in Kazakhstan but it is not clear which were recorded from C. europaea. Anderson (1974) first described some of the Smicronyx species listed on Cuscuta.

Means of Movement and Dispersal

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Natural Dispersal (Non-Biotic)

Natural, non-biotic, dispersal of Cuscuta seed is very limited and must occur mainly by water.

Vector Transmission (Biotic)

Animals may help spread of Cuscuta on an occasional basis following ingestion, or by transfer of soil containing the seeds.

Agricultural Practices

Man is by far the most important dispersal agent, thanks to the harvesting and transport of crop material contaminated with vines and seeds of Cuscuta, and by movement of soil on farm machinery.

Accidental Introduction

Accidental introduction across national boundaries can quite readily occur when Cuscuta seed is a contaminant of crop seed, as it may well be in seed of clovers or lucerne.

Intentional Introduction

Intentional introduction is relatively unlikely, though any Cuscuta species could occasionally be regarded as a botanical curiosity and introduced for this reason.

Plant Trade

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Plant parts liable to carry the pest in trade/transportPest stagesBorne internallyBorne externallyVisibility of pest or symptoms
Flowers/Inflorescences/Cones/Calyx weeds/seeds; weeds/stems; weeds/whole plants
Fruits (inc. pods) weeds/seeds
Growing medium accompanying plants weeds/seeds
True seeds (inc. grain) weeds/seeds
Plant parts not known to carry the pest in trade/transport
Seedlings/Micropropagated plants

Impact Summary

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Animal/plant collections None
Animal/plant products None
Biodiversity (generally) None
Crop production Negative
Environment (generally) None
Fisheries / aquaculture None
Forestry production None
Human health None
Livestock production None
Native fauna None
Native flora None
Rare/protected species None
Tourism None
Trade/international relations Negative
Transport/travel None


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Holm et al. (1979) list C. europaea as a 'serious' weed in Afghanistan and Poland, and a 'principal' weed in Czechoslovakia and the former USSR. It is rarely a major weed over large areas, perhaps because of the lack of attack on Gramineae [Poaceae], and the cleaning effect of cereal crops in rotation. But once contact is established with the host phloem, Cuscuta becomes a powerful sink for metabolites, causing a severe drain on host resources and often completely preventing normal fruit development, as shown by Wolswinkel (1979) for C. europaea on faba bean (Vicia faba). Owing to this powerful metabolic sink effect, studied and described in detail by Wolswinkel and Ammerlaan (1983), the damage to infected hosts can be severe, to the extent of total crop loss. Less dry matter and ash were found in the leaves of parasitized Urtica dioica and Aegopodium podagraria than in those of healthy plants. Leaves of parasitized U. dioica plants contained 8.5% less chlorophyll than uninfested ones (Gal'vidis, 1993). Perhaps the crop most seriously affected is sugarbeet in Italy, the former Yugoslavia and eastern Europe. There is also further economic loss when crop produce, such as clover or lucerne seed, intended for export, is rejected or has to be expensively cleaned.

There are occasional reports of toxicity to livestock from Cuscuta species, including toxicity to horses from C. europaea (Pergat and Stolyarova, 1961).

Environmental Impact

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C. europaea is not known to have caused any significant environmental impact.

Impact: Biodiversity

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C. europaea is not known to have caused any significant impact on biodiversity.

Social Impact

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C. europaea is not known to have caused any significant social impact.

Risk and Impact Factors

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  • Proved invasive outside its native range
  • Highly adaptable to different environments
  • Has high reproductive potential
  • Has propagules that can remain viable for more than one year
Impact outcomes
  • Negatively impacts agriculture
Impact mechanisms
  • Competition - monopolizing resources
Likelihood of entry/control
  • Highly likely to be transported internationally accidentally
  • Difficult to identify/detect as a commodity contaminant
  • Difficult/costly to control


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Cuscuta species are frequently used as a research tool, to create a bridge between different plants for transmission of viruses and mycoplasma-like organisms from one host to another (see Dawson et al., 1994). Eppler (1992) reports on the use of C. europaea to obtain transmission of a virus in hops (Humulus lupulus).

C. europaea has recently been reported to be a source of an immuno-stimulant compound of pharmacological interest (Stanilova at al., 2001).

Similarities to Other Species/Conditions

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Cuscuta species are all superficially very similar and difficult to separate without careful study of floral characteristics. C. europaea is in section Cuscuta, characterized by two styles with linear stigmas. Other sections have a single style (Monogyna) or capitate stigmas (Grammica). A number of other weedy species occur in section Cuscuta. Several of those, including C. planiflora and C. palaestina have sessile flowers, while C. epithymum has acute sepals; C. epilinum, occurring only on flax/linseed, has large flower heads over 15 mm across. C. pedicellata also has pedicillate flowers but the capsules are not circumcissile.

Severova (1991) describes a range of characters useful for distinguishing different Cuscuta spp., including C. europaea. The most comprehensive key is provided by Yuncker (1932). Keys to the European species are provided in Flora Europaea (Valentine, 1972) and by Feinbrun (1970).

Prevention and Control

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Due to the variable regulations around (de)registration of pesticides, your national list of registered pesticides or relevant authority should be consulted to determine which products are legally allowed for use in your country when considering chemical control. Pesticides should always be used in a lawful manner, consistent with the product's label.

Cultural Control

Use of clean crop seed is vital. Seed crops which might have been infested should be inspected and cleaned if necessary, or seed should be obtained from a source known to be reliable. Separation of Cuscuta seeds from lucerne is quite successfully achieved by equipment comprising felt- or velvet-covered rollers to which the rough seeds of Cuscuta stick while the smoother crop seeds pass over (see Dawson et al., 1994).

Rotation with non-susceptible crops can be helpful. Cereals are virtually immune, but some broad-leaved crops may also be sufficiently resistant, including soyabean, kidney bean (Phaseolus vulgaris), squash (Cucurbita sp.), cucumber and cotton (see Parker and Riches, 1993).

Deep shade suppresses the coiling and attachment of Cuscuta; hence encouraging a dense crop canopy is a valuable component of any integrated control programme.

Mechanical Control

The young seedlings of Cuscuta, with rudimentary roots, are readily destroyed by shallow tillage before or after crop establishment. Hand-pulling is suitable only for scattered infestations as the infested crop plants have to be removed with the parasite. Scattered infestations of C. campestris have also been controlled by heat, using a hand-held flame gun. More extensive infestations of that species in lucerne are also sometimes treated with overall flaming, as the crop is able to recover. Close mowing is an alternative means of control in lucerne and clovers.

Chemical Control

There is relatively little information on the use of herbicides against C. europaea but good results have been reported for ethofumesate in sugar beet; propyzamide in sugar beet and onions; and a mixture of chlorthal-dimethyl with chlorpropham in onions and carrots (Foschi and Rapparini, 1977; Rapparini and Campagna, 1998). Other herbicides of value in the control of other Cuscuta species, especially C. campestris, include metham-sodium and dazomet as pre-planting fumigants, trifluralin and related compounds, pendimethalin, fluchloralin, butralin etc, in lucerne and some other legumes. These might be expected to be equally effective against C. europaea.

Biological Control

Biological control of C. europaea has been attempted in Kazakhstan, by augmentative release of Melanagromyza cuscutae but the outcome is not certain (Julien and Griffiths, 1998). This insect has also failed to give convincing results on other Cuscuta spp. The biology and host range of M. cuscutae were studied by Baloch et al. (1967) and reviewed by Spencer (1973).

Other attempts at biological control of Cuscuta spp. by insects have mainly involved the gall-forming weevils Smicronyx spp.; S. tartaricus has given encouraging results for control of C. europaea in Kazakhstan when introduced from one region to another (Shinkarenko, 1982b), while among pathogens, Alternaria cuscutacidae and a form of Colletotrichum gloeosporioides [Glomerella cingulata] have given helpful results against C. chinensis and C. australis (Parker and Riches, 1993; Julien and Griffiths, 1998).

Prospects for biological control of C. europaea and other Cuscuta spp. have been reviewed by Girling et al. (1979).

Integrated Control

Integrated methods for control of Cuscuta species generally involve the all-important use of clean seed; good field hygiene to eradicate scattered infestations before they get out of control; good control of other weeds which might act as reservoirs of infestation; timing of tillage and planting to maximize destruction of parasite seedlings before sowing; and optimum planting arrangement and growing conditions for a good crop canopy to suppress development of the weed.


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Anderson DM, 1974. Some species of Smicronyx (Coleoptera:Curculionidae) associated with Cuscuta species (Convolvulaceae) in Pakistan. Proceedings of the Entomological Society of Washington, 76(4):359-374

Baloch GM; Mohyuddin AI; Ghani MA, 1967. Biological control of Cuscuta spp. II. Biology and host plant range of Melanogromyza cuscutae Hering (Dipt. Agromyzidae). Entomophaga, 12:481-489.

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Stanilova S; Dobreva Z; Zhelev Z, 2001. Changes in serum levels of cytokines in mice injected with an immunostimulator C3bgp isolated from Cuscuta europaea. International Immunopharmacology, 1(8):1597-1604; 26 ref.

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Webb CJ; Sykes WR; Garnock-Jones PJ, 1988. Flora of New Zealand Volume IV. Naturalised Pteridophytes, Gymnosperms and Dicotyledons. Christchurch, New Zealand: DSIR Botany Division, 1365 pp.

Wolswinkel P, 1979. Transport of assimilates and mineral elements at the site of attachment of Cuscuta. The role of phloem unloading in the parasitic relationship. Proceedings, Second International Symposium on Parasitic Weeds, North Carolina, 1979., 156-164

Wolswinkel P; Ammerlaan A, 1983. Sucrose and hexose release by excised stem segments of Vicia faba L. The sucrose-specific stimulating influence of Cuscuta on sugar release and the activity of acid invertase. Journal of Experimental Botany, 34(148):1516-1527

Yuncker TG, 1932. The genus Cuscuta. Memoirs of the Torrey Botanical Club, 18:113-331.

Distribution References

Artemov I A, Zykova E Yu, 2019. Invasive and potentially invasive plant species in State Nature Biosphere Reserves of the Altai Republic (Russia). Acta Biologica Sibirica. 5 (4), 73-82. DOI:10.14258/abs.v5.i4.7059

CABI, Undated. Compendium record. Wallingford, UK: CABI

CABI, Undated a. CABI Compendium: Status inferred from regional distribution. Wallingford, UK: CABI

CABI, Undated b. CABI Compendium: Status as determined by CABI editor. Wallingford, UK: CABI

Fang Rhui-cheng, Musselman LJ, Plitmann U, 1995. (20. Cuscuta Linnaeus). In: Flora of China, St Louis, USA: Missouri Botanical Garden. 322-25.

Grierson AJC, Long DG, 1999. Flora of Bhutan including a record of plants from Sikkim and Darjeeling., 2 (2) Edinburgh, UK: Royal Botanic Garden, Edinburgh and Royal Government of Bhutan.

Holm L, Pancho J V, Herberger J P, Plucknett D L, 1979. A geographical atlas of world weeds. New York, Chichester (), Brisbane, Toronto, UK: John Wiley and Sons. xlix + 391 pp.

Joshi S K, Sanjay Gairola, 2003. Cuscuta europaea Linn. (Dodder plant): an emerging threat to plant diversity of Valley of Flowers. Current Science, 84 (10), 1285-1286.

PLANTS, 2003. USDA Natural Resources Conservation Service Plants Profile Online Database.,

Polunin O, Stainton A, 1987. Concise Flowers of the Himalaya., Delhi, India: Oxford University Press.

Seebens H, Blackburn T M, Dyer E E, Genovesi P, Hulme P E, Jeschke J M, Pagad S, Pyšek P, Winter M, Arianoutsou M, Bacher S, Blasius B, Brundu G, Capinha C, Celesti-Grapow L, Dawson W, Dullinger S, Fuentes N, Jäger H, Kartesz J, Kenis M, Kreft H, Kühn I, Lenzner B, Liebhold A, Mosena A (et al), 2017. No saturation in the accumulation of alien species worldwide. Nature Communications. 8 (2), 14435.

Tanase M, Oprean L, 2001. Research on the spreading of Cuscuta L. (Convolvulaceae) in the county of Sibiu, Romania. Feddes Repertorium. 112 (5/6), 401-405. DOI:10.1002/fedr.4921120512

USDA, 2003. USDA, ARS, Germplasm Resources Information Network Online Database.,

Valentine DH, 1972. CXLVI Convolvulaceae. In: Flora Europaea Volume 3. Diapensiaceae to Myoporaceae, [ed. by Tutin TG, Heywood VH, Burges NA, Moore DM, Valentine DH, Walters SM, Webb DA]. Cambridge, UK: Cambridge University Press. 74-83.

Webb C J, Sykes W R, Garnock-Jones P J, 1988. Flora of New Zealand, Volume IV: Naturalised pteridophytes, gymnosperms, dicotyledons. Christchurch, New Zealand: Botany Division, DSIR. 1365 pp.

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