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WIKTROP - Weed Identification and Knowledge in the Tropical and Mediterranean areas
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Senna occidentalis (L.) Link

Accepted
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
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Senna occidentalis (L.) Roxb.
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Senna occidentalis (L.) Roxb.
Senna occidentalis (L.) Roxb.
🗒 Synonyms
synonymCassia caroliniana Walter
synonymCassia ciliata Raf.
synonymCassia falcata L.
synonymCassia foetida Pers.
synonymCassia laevigata sensu auct.
synonymCassia laevigata Sensu auct.
synonymCassia macradenia Collad.
synonymCassia obliquifolia Schrank
synonymCassia occidentalis (L.)Rose
synonymCassia occidentalis L.
synonymCassia occidentalis var. arista "sensu Hassk., non DC."
synonymCassia occidentalis var. arista Sensu Hassk., non DC.
synonymCassia occidentalis var. aristata Collad.
synonymCassia planisiliqua L.
synonymCassia plumieri DC.
synonymDitramexa occidentalis Britton & Rose
synonymDitremexa occidentalis (L.) Britton & Wilson
synonymDitremexa occidentalis (L.)Britton & Wilson
🗒 Common Names
Creoles and pidgins; French-based
  • Indigo, Kinkeliba (Nouvelle-Calédonie)
  • Bentamaré, Café bâtard, Casse-café, Casse-puante, Dartrier, Gros indigo sauvage, Quinquéliba, Souveraine
English
  • Sickle pod
  • Stinking weed, Wild coffee (South Africa)
Malagasy
  • Sanatrindolo, Tsotsorinangatra, Piripipika (Côte Est)
Other
  • Hasa n'drume (Shimaore, Mayotte)
  • Voa tsirongoto kely (Kibushi, Mayotte)
📚 Overview
Overview
Brief
Code

CASOC

Growth form

broadleaf

Biological cycle

annual

Habitat

terrestrial

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    Diagnostic Keys

    The genus Cassia was splited in Cassia, Chamaecrista and Senna, according to the following criteria :
     

    Glands on the rachis and petiole Petals Stamens Fruit Bracteoles Genus
    absent subequal 10 indehiscent present Cassia
    absent or present subequal 10 or 7 fertil indehiscent or dehiscent not elastic, valve not coiling absent Senna
    present unequal 10 or5 fertil elastically dehiscent, valves coiling present Chamaecrista


    Distribution of Cassia spp. in the following table :

     
    Old name Valid name
    Cassia absus L. Chamaecrista absus (L.) H.S.Irwin & Barneby
    Cassia alata L. Senna alata (L.) Roxb..
    Cassia fistula L. Cassia fistula L.
    Cassia hirsuta L. Senna hirsuta (L.) H.S.Irwin & Barneby
    Cassia javanica L. Cassia javanica L.
    Cassia kirkii Oliv. Chamaecrista kirkii (Oliv.) Standl.
    Cassia mimosoides L. Chamaecrista mimosoides (L.) Greene
    Cassia nictitans L. Chamaecrista nictitans (L.) Moench
    Cassia nigricans Vahl. Chamaecrista nigricans (Vahl.) Greene
    Cassia obtusifolia L. Senna obtusifolia (L.) H.S.Irwin & Barneby
    Cassia occidentalis L. Senna occidentalis (L.) Link
    Cassia rotundifolia Pers. Chamaecrista rotundifolia (Pers.) Greene
    Cassia siamea Lam. Senna siamea (Lam.) H.S.Irwin & Barneby
    Cassia sieberiana DC Cassia sieberiana DC
    Cassia tora L. Senna tora (L.) Roxb.
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      Description
      Global description
       
      Senna occidentalis is a shrubby plant with yellow flowers and bright green foliage, malodorous. Usually, this shrub is not very branched, almost hairless. The leaves are alternately arranged along the stem. They consist of 4 to 6 pairs of small independent leaves, ending in a point and carried by a short petiole along the midrib. They are slightly downy below and on the edge. The flowers are yellow in colour. They are grouped at the top of the branches. The fruit is a long, slightly curved and flattened pod. It has bulges on the seeds and opens along the two edges. The seeds are flattened and brown.
       
      Cotyledons
       
      Orbicular and subsessile cotyledons. 3-5 ribs from the base of the lamina. They measure 20 mm in diameter. Slightly cordate base.
       
      First leaves
       
      First leaves are alternate, composed and paripinnate. The first leaf has two pairs of leaflets, the following bear two to three pairs. Leaflets are oblong to oval, rounded or wedged apex. Glabrous surfaces.
       
      General habit
       
      Plant with erect growth habit, developing in small bush, measuring up to 2 meters high.
       
      Underground system
       
      Taproot system.
       
      Stem
       
      Solid and cylindrical stem. It is glabrous to finely pubescent.
       
      Leaf
       
      Leaves alternate and paripinnately compound. 10 to 15 cm long. Base of petiole flanked by two triangular deciduous stipules. Upper part of the petiole and rachis are excavated in grooves. Black protruding gland at the base of the petiole. Leaves comprising of 4-6 pairs of leaflets. The lamina of the leaflets is oval to elliptical, 3 to 8 cm long and 15 to 40 mm wide. The size of the leaflets increases from the base to the top of the leaf. The lower face and margin are slightly pubescent. The upper side is smooth. The base is asymmetrically rounded or wide angled; the top is in acuminate tip. The margin is entire.
       
      Inflorescence
       
      Flowers solitary or grouped in axillary clusters of 2 to 5 flowers at the ends of branches, or atop an axillary peduncle, 2 to 4 cm long.
       
      Flower
       
      Flowers are yellow in colour. Calyx with 5 green, elliptical, a little uneven sepals (oval lower sepal sepals). Corolla 1.5 to 3 cm in diameter, with 5 yellow petals, unequal (wider upper petal), free, ovate, rounded tip, veined. 10 unequal stamens (the previous two long curved net and anther). Ovary linear, long, curved, glabrous, ending with a hairy stigma.
       
      Fruit
       
      The fruit is a linear to oblong or slightly curved, flat pod,  10 to 15 long cm and  7 to 8 mm wide. It has thick suture lines and bulges on the grains. It contains 20 to 60 seeds arranged in line and separated by a thin membrane.
       
      Seed
       
      Seed oblong, flat, brown, 4 mm long and 3 mm wide.
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        📚 Natural History
        Life Cycle

        Life cycle

        Annual
        Annual

        Mayotte: Senna occidentalis flowers from March to May and from November to December and fruits from March to June and in December.
        New Caledonia: Senna occidentalis germination takes place mainly at the beginning of the rainy season and the seedlings can reach 1 m in few weeks. Flowering lasts from February to April followed by fruiting and death of most plants. Some will survive another year under good conditions of heat and humidity.

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          Reproduction
          Senna occidentalis is an annual species that can live more than a year under favorable conditions. It multiplies only by expulsion of seeds when the pod opens. They are transported by runoff, mud stuck to hooves and agricultural machinery. They can also contaminate hay crops.
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            Morphology

            Leaf type

            Compound
            Compound

            Type of prefoliation

            Leaf ratio medium
            Leaf ratio medium

            Latex

            Without latex
            Without latex

            Root type

            Taproot
            Taproot

            Stipule type

            Lanceolate stipule
            Lanceolate stipule

            Pod type

            Compressed pod in section
            Compressed pod in section

            Cotyledon type

            orbicular
            orbicular
            truncate
            truncate

            Lamina base

            rounded
            rounded
            asymmetric
            asymmetric

            Lamina apex

            acute
            acute
            acuminate
            acuminate

            Inflorescence type

            Raceme
            Raceme
            Axillary solitary flower
            Axillary solitary flower

            Life form

            Broadleaf plant
            Broadleaf plant
            Look Alikes

             See also: Determination key of eight species of Cassia L. (Caesalpiniaceae), West African weeds.

            Identification Key of Senna
            Leaflets with accuminate apex Glabrous leaflets (Upper surface) S. occidentalis
            Densely pubescent leaflets S. hirsuta
            Leaflets with rounded apex One rod shaped gland on the rachis of the leaf S. obtusifolia
            Two rod shaped glands on the rachis of the leaf S. tora

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              Ecology

              A weed of roadsides, waste areas, disturbed sites, pastures, grasslands, open woodlands, coastal areas and crops in tropical, subtropical and semi-arid regions.

              Comoros: Senna occidentalis is present in coastal areas up to 300 m altitude on the three islands.
              Madagascar: ruderal species (along the roads of villages and irrigation canals). Very common on the edge of fields on tanety and baiboho, often indicative of compacted soil when it is abundant.
              Mauritius: Species cultivated as a medicinal plant and easily naturalized, it is common in vacant lots and occasionally in crops.
              Mayotte: Senna occidentalis is an exotic species sometimes naturalized in the anthropized environments, in particular in urban zone and on roadsides. It is present mainly in the north and center of the island.
              New Caledonia: Introduced in the territory in the mid-19th century, it is commonly found in wasteland and farmland, mainly in coastal areas in dry regions where it can invade poorly maintained pastures by scattered spots or larger stands.
              Reunion: The species is implanted in all lowland areas of Reunion Island. It does not have any preferences for the soil type provided that it drains well. It is common throughout the North zone, East and South of the island. It is rarer on the West coast.
              Seychelles: aggressive colonizing species of cultivated areas on light soil as well as on heavy soils in all regions of Seychelles.

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                Miscellaneous Details

                Toxicity

                The seeds of Senna occidentalis, consumed fresh by livestock, are toxic (neuromuscular and digestive symptoms that can lead to death).

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                  📚 Habitat and Distribution
                  Description

                  Geographical distibution

                  Madagascar
                  Madagascar
                  Reunion Island
                  Reunion Island
                  Comoros
                  Comoros
                  Mauritius
                  Mauritius
                  Seychelles
                  Seychelles
                  Origin

                  Native to the tropical and subtropical regions of the America. The Latin word occidentalis means western, and refers to the origin.

                  Worldwide distribution

                  Senna occidentalis is widespread in warm areas of the world.

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                    No Data
                    📚 Occurrence
                    No Data
                    📚 Demography and Conservation
                    Risk Statement

                    Local harmfulness
                     
                    Comoros: Senna occidentalis is a ruderal plant, common in waste land of low altitude and less frequent in crops.
                    Ghana: Rare and scarce.
                    Madagascar: weed infrequent and scarce in rainfed crops in the fields near the villages and terraces along the marshland. It is generally less frequent than S. obtusifolia.
                    Mauritius: very rare weed in sugar cane fields where it has a very low harmfulness.
                    Mayotte: S. occidentalis is relatively frequent, present in 5% of cultivated plots, especially in fruit and ylang plantations, and sometimes in pastures.
                    Nigeria: Rare and scarce.
                    Uganda: Rare but abundant when present.
                    Reunion: S. occidentalis is present in 21% of the plots of the island. It infests mainly sugar cane fields, but never abundant.
                    Seychelles: weed important in many crops, particularly tubers crops, orchards and tea and coconut plantations.
                    South Africa: It invades disturbed areas and replaces native species. It invades roadsides and riverbanks in savanna and grassland as well as waste land and disturbed fields.
                     

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                      📚 Uses and Management
                      Uses
                      Seeds of Senna occidentalis can be roasted and used as a substitute for coffee. They have also been used as an adulterant for coffee. There is apparently no caffeine in mogdad coffee.
                       
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                        Management
                        Global control
                         
                        For weeding Advice broadleaf annual weeds of irrigated rice and lowland in Africa, consult

                        Local control
                         
                        Madagascar: In general, little troublesome in crops. Manual weeding is difficult because of the strong taproot system. Controllable with oxadiazon pre-emergence and 2,4-D and / or glyphosate post-emergence, on young plants. Tolerant to most herbicides as adults (controlled as dicamba postemergence, product not available in Madagascar).
                        New Caledonia: As with many weeds, its appearance and development is favored by overgrazing. In case of infestation, a reduction animal densities  and with the maintenance of a dense grass cover will reduce stands quite significantly. The integral management can be completed by mechanical and chemical control by combining a gyrobroyage and herbicide application on regrowth during growth period of the plant. A spraying of picloram and 2,4-D is recommended. A complete herbicide with glyphosate is also effective but it will also affect forage grasses if the application is not made in a targeted way. Tillage can control the invasion of this plant in the state of seedling.
                        Reunion: see the website of CaroCanne (The online magazine of sugar cane workers in Réunion); Technical specifications No. 35
                         
                        Efficiency spectrum of herbicides on Senna occidentalis in sugarcane cultivation
                        Active material commercial product dose of commercial product efficiency
                        pre-emergence
                        mesotrione +
                        S-metolachlore
                        Camix 3,75 l/ha
                        mesotrione + S-metolachlore
                        + S-metolachlore
                        Camix + Mercantor Gold 3,75 l/ha + 0,5 l/ha
                        mesotrione + S-metolachlorere
                        + isoxaflutole
                        Camix + Merlin 3,75 l/ha + 0,1 kg/ha
                        mesotrione + S-metolachlore
                        + pendimethaline
                        Camix + Prowl 400 3,75 l/ha + 3,0 l/ha
                        isoxaflutole + pendimethaline
                        + metribuzine
                        Merlin + Prowl 400 + Sencoral 0,067 kg/ha + 1,5 l/ha + 0,625 kg/ha
                        isoxaflutole + pendimethaline
                        + mesotrione + S-metolachlore
                        Merlin + Prowl 400 + Camix 0,067 kg/ha + 1,5 l/ha + 2,5 l/ha

                        (the dose are expressed in commercial product) - 2014

                        Good efficiency
                        medium efficiency

                        Inefficient
                         
                        Data acquired in Reunion on the effectiveness of herbicides in the context of the sugarcane herbicide network by eRcane Network with funding from the ODEADOM and ONEMA.
                        Action led by the French Ministry of Agriculture, food and forest, with financial support from the National Agency for Water and Aquatic Environments, on the finance issued from the tax for the pollution diffused, attributed to the finance of the Ecophyto plan.
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                          📚 Information Listing
                          References
                          1. Blanfort, V., F. Desmoulins, J. Prosperi, T. Le Bourgeois, R. Guiglion and P. Grard (2010). AdvenPaC V.1.0 : Adventices et plantes à conflit d'intérêt des Pâturages de Nouvelle-Calédonie. Montpellier, France, IAC, Cirad.
                          2. Huat, J., Nagy, M., Carpente, A., Schwartz, M., Le Bourgeois, T. & Marnotte, P. 2021. Guide de la flore spontannée des agrosystèmes de Mayotte. Montpellier, Cirad. 150 p.
                          1. Australian Government. Weeds in Australia.
                          1. Australian Tropical Rainforest Plants
                          1. Hyde, M.A., Wursten, B.T. & Ballings, P. (2013). Flora of Zimbabwe: Species information: Senna occidentalis.
                          1. http://idao.cirad.fr/SpecieSheet?sheet=adventoi/especes/c/casoc/casoc_fr.html
                          1. http://www.environment.gov.au/cgi-bin/biodiversity/invasive/weeds/weeddetails.pl?taxon_id=6537
                          1. http://keys.trin.org.au/key-server/data/0e0f0504-0103-430d-8004-060d07080d04/media/Html/taxon/Senna_occidentalis.htm
                          1. http://keys.lucidcentral.org/keys/v3/eafrinet/weeds
                          1. http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=127100
                          1. http://www.hear.org/pier/species/senna_occidentalis.htm
                          1. http://www.sntc.org.sz/alienplants/speciesinfo.asp?spid=70
                          1. Husson, O., H. Charpentier, F.-X. Chabaud, K. Naudin, Rakotondramanana et L. Séguy (2010). Flore des jachères et adventices des cultures. Annexe 1 : les principales plantes de jachères et adventices des cultures à Madagascar. In : Manuel pratique du semis direct à Madagascar. Annexe 1 - Antananarivo : GSDM/CIRAD, 2010 : 64 p.
                          1. Le Bourgeois, T., Carrara, A., Dodet, M., Dogley, W., Gaungoo, A., Grard, P., Ibrahim, Y., Jeuffrault, E., Lebreton, G., Poilecot, P., Prosperi, J., Randriamampianina, J.A., Andrianaivo, A.P., Théveny, F. 2008. Advent-OI : Principales adventices des îles du sud-ouest de l'Océan Indien.V.1.0. In Cirad [ed.]. Cirad, Montpellier, France. Cdrom.
                          1. Noxious Weeds of Australia. W. Parsons and E. Cuthbertson, 1992, pages 459-461.
                          2. Akobundu I. O. and Agyakwa C.W. (1998). A handbook of West African Weeds. International Institute of Tropical Agriculture, Ibadan, Nigeria 308p.
                          3. Flora of China: http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=242348611
                          4. Grard, P., T. Le Bourgeois, J. Rodenburg, P. Marnotte, A. Carrara, R. Irakiza, D. Makokha, G. kyalo, K. Aloys, K. Iswaria, N. Nguyen and G. Tzelepoglou (2012). AFROweeds V.1.0: African weeds of rice. Cédérom. Montpellier, France & Cotonou, Bénin, Cirad-AfricaRice eds.
                          5. International Legume Data and Information Service: http://www.ildis.org/LegumeWeb?version~10.01&LegumeWeb&tno~665&genus~Senna&species~occidentalis
                          6. Pacific Island Ecosystems at Risk (PIER): http://www.hear.org/pier/species/senna_occidentalis.htm.
                          7. Johnson, D.E., 1997. Weeds of rice in West Africa. WARDA, Bouaké. 214p.
                          8. BioNet-EAFRINET: http://keys.lucidcentral.org/keys/v3/eafrinet/weeds/key/weeds/Media/Html/Senna_occidentalis_%28Coffee_Senna%29.htm Weed of Australia: http://www.weeds.org.au/cgi-bin/weedident.cgi?tpl=plant.tpl&state=&s=&ibra=all&card=S32
                          9. Invasives South Africa https://invasives.org.za/fact-sheet/stinking-weed/
                          Information Listing > References
                          1. Blanfort, V., F. Desmoulins, J. Prosperi, T. Le Bourgeois, R. Guiglion and P. Grard (2010). AdvenPaC V.1.0 : Adventices et plantes à conflit d'intérêt des Pâturages de Nouvelle-Calédonie. Montpellier, France, IAC, Cirad.
                          2. Huat, J., Nagy, M., Carpente, A., Schwartz, M., Le Bourgeois, T. & Marnotte, P. 2021. Guide de la flore spontannée des agrosystèmes de Mayotte. Montpellier, Cirad. 150 p.
                          3. Australian Government. Weeds in Australia.
                          4. Australian Tropical Rainforest Plants
                          5. Hyde, M.A., Wursten, B.T. & Ballings, P. (2013). Flora of Zimbabwe: Species information: Senna occidentalis.
                          6. http://idao.cirad.fr/SpecieSheet?sheet=adventoi/especes/c/casoc/casoc_fr.html
                          7. http://www.environment.gov.au/cgi-bin/biodiversity/invasive/weeds/weeddetails.pl?taxon_id=6537
                          8. http://keys.trin.org.au/key-server/data/0e0f0504-0103-430d-8004-060d07080d04/media/Html/taxon/Senna_occidentalis.htm
                          9. http://keys.lucidcentral.org/keys/v3/eafrinet/weeds
                          10. http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=127100
                          11. http://www.hear.org/pier/species/senna_occidentalis.htm
                          12. http://www.sntc.org.sz/alienplants/speciesinfo.asp?spid=70
                          13. Husson, O., H. Charpentier, F.-X. Chabaud, K. Naudin, Rakotondramanana et L. Séguy (2010). Flore des jachères et adventices des cultures. Annexe 1 : les principales plantes de jachères et adventices des cultures à Madagascar. In : Manuel pratique du semis direct à Madagascar. Annexe 1 - Antananarivo : GSDM/CIRAD, 2010 : 64 p.
                          14. Le Bourgeois, T., Carrara, A., Dodet, M., Dogley, W., Gaungoo, A., Grard, P., Ibrahim, Y., Jeuffrault, E., Lebreton, G., Poilecot, P., Prosperi, J., Randriamampianina, J.A., Andrianaivo, A.P., Théveny, F. 2008. Advent-OI : Principales adventices des îles du sud-ouest de l'Océan Indien.V.1.0. In Cirad [ed.]. Cirad, Montpellier, France. Cdrom.
                          15. Noxious Weeds of Australia. W. Parsons and E. Cuthbertson, 1992, pages 459-461.
                          16. Akobundu I. O. and Agyakwa C.W. (1998). A handbook of West African Weeds. International Institute of Tropical Agriculture, Ibadan, Nigeria 308p.
                          17. Flora of China: http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=242348611
                          18. Grard, P., T. Le Bourgeois, J. Rodenburg, P. Marnotte, A. Carrara, R. Irakiza, D. Makokha, G. kyalo, K. Aloys, K. Iswaria, N. Nguyen and G. Tzelepoglou (2012). AFROweeds V.1.0: African weeds of rice. Cédérom. Montpellier, France & Cotonou, Bénin, Cirad-AfricaRice eds.
                          19. International Legume Data and Information Service: http://www.ildis.org/LegumeWeb?version~10.01&LegumeWeb&tno~665&genus~Senna&species~occidentalis
                          20. Pacific Island Ecosystems at Risk (PIER): http://www.hear.org/pier/species/senna_occidentalis.htm.
                          21. Johnson, D.E., 1997. Weeds of rice in West Africa. WARDA, Bouaké. 214p.
                          22. BioNet-EAFRINET: http://keys.lucidcentral.org/keys/v3/eafrinet/weeds/key/weeds/Media/Html/Senna_occidentalis_%28Coffee_Senna%29.htm Weed of Australia: http://www.weeds.org.au/cgi-bin/weedident.cgi?tpl=plant.tpl&state=&s=&ibra=all&card=S32
                          23. Invasives South Africa https://invasives.org.za/fact-sheet/stinking-weed/

                          L'agroécologie pratique - Nos plantes hôtes

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                            🐾 Taxonomy
                            📊 Temporal Distribution
                            📷 Related Observations
                            👥 Groups
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