Naupactus leucoloma Boheman
Geographic distribution
Major pest of many crops
  • Argentina
    • Buenos Aires
    • Catamarca
    • Chaco
    • Chubut
    • Córdoba
    • Corrientes
    • Entre Ríos
    • Formosa
    • Jujuy
    • La Pampa
    • La Rioja
    • Mendoza
    • Neuquén
    • Río Negro
    • Salta
    • San Juan
    • San Luis
    • Santa Fe
    • Santiago del Estero
    • Tucumán
  • Uruguay
Other distribution
Rio Grande do Sul

Artigas, Canelones, Cerro Largo, Colonia, Durazno, Lavalleja, Montevideo, Paysandú, Soriano, Tacuarembó

It was introduced in Chile, including Easter island and Juan Fernández islands, Perú, México, Australia, New Zealand, South Africa and USA.
  • Naupactus leucoloma Boheman 1840: 62
  • Pantomorus leucoloma : Buchanan 1939: 12
  • Pantomorus pilosus Buchanan 1942: 107
  • Pantomorus striatus Buchanan 1942: 108
  • Pantomorus dubius Buchanan 1942: 109
  • Graphognathus leucoloma : Buchanan 1947: 20
  • Graphognathus leucoloma pilosus : Buchanan 1947: 20
  • Graphognathus leucoloma striatus : Buchanan 1947: 20
  • Graphognathus leucoloma fecundus : Buchanan 1947: 20
  • Graphognathus leucoloma imitator : Buchanan 1947: 20
  • Pantoplanes (Graphoganthus) leucoloma : Voss 1954: 221
Naupactus leucoloma is one of the best known species of the tribe Naupactini, due to its economic importance in the countries where it was accidentally introduced from South America. It belongs to the N. leucoloma species group and is close to N. minor and N. peregrinus(Lanteri & Marvaldi 1995). The three species are flightless and commonly known as white-fringed weevils, because they are brown-grey, with a distinct marginal white stripe from head to apex of elytra; the scutellum is also white, and the pronotum usually has five slender stripes (along midline, sides and margins). It mainly differentiates from N. minor because is usually larger, with longer suberect setae on pronotum and elytra, and corbels of the hind tibiae absents. Both have suboval scales and setae of the pronotum anteriorly directed.

The first instar and mature larvae have been described by Marvaldi & Loiácono (1994), and Marvaldi (1998); eggs and oviposition type, by Marvaldi (1999).
Naupactus leucoloma is parthenogenetic in most of its range, and is infected with the bacterium Wolbachia (Rodriguero et al. 2010a). Its potential geographical distribution outside South America was assessed by niche modeling techniques (Guzmán et al. 2012).
There are about 385 known hosts for Naupactus leucoloma, including ornamentals, fruit trees, horticultural and industrial crops, and forage. According to Kuschel (1972, 1990) it shows preferences for legumes, particularly Phaseolus vulgaris (Fabaceae) in Chile, where is known as “capachito or burrito del frijol”.
In Argentina, Uruguay and Brazil it causes damage in alfalfa (Medicago sativa L.) and soybean (Glycine max L. (Merr.) (Fabaceae) (Alzugaray et al. 1998, Lanteri et al. 2002a, 2013a). Other plants of economic importance are strawberry (Fragaria sp) and Prunus avium L. (Rosaceae), onion (Allium cepa L.) (Amaryllidaceae), potato (Solanum tuberosum L.) and pepper (Capsicum annuum L.) (Solanaceae) (Lanteri et al. 2002a). Some wild host plants are Solidago chilensis Meyen and Wedelia glauca (Ort.) Hoff. (Asteraceae).
  • BOHEMAN C.H. 1840. In: Schoenherr, C.J. Genera et species curculionidum cum synonymia hujus familiae. Roret, Paris; Fleischer, Lipsiae. Vol. 6, pt.1, pp. 1-474.
  • BUCHANAN L.L. 1939. The species of Pantomorus of America north of Mexico. United States Department of Agriculture, Miscellaneous Publications 341: 1-39, illus.
  • BUCHANAN L.L. 1942. Four new species of white-fringed beetles (subgenus Graphognathus) from the southeastern part of the United States (Coleoptera: Curculionidae). Bulletin of the Brooklyn Entomological Society 37(3): 107-110.
  • BUCHANAN L.L. 1947. A correction and two new races in Graphognatus (white-fringed beetles) (Coleoptera: Curculionidae). Journal of the Washington Academy of Sciences 37(1): 19-22, illus.
  • VOSS E. 1954. Curculionidae (Col.). Beiträge zur fauna Perus, vol. 4, pp. 193-376, illus.
  • KUSCHEL G. 1972. The foreign Curculionoidea established in New Zealand (Insecta: Coleoptera). The New Zealand Journal of Science 15(3): 273-289.
  • KUSCHEL G. 1990. Beetles in a suburban environment: a New Zealand case study. The identity and status of Coleoptera in the natural and modified habitats of Lynfield, Auckland (1974-1989), DSIR Plant Protection Report (New Zealand) 3: 1-118.
  • LANTERI A.A. 1994. Bases para el control integrado de los gorgojos de la alfalfa. De la Campana Ediciones, La Plata, 119 pp.
  • MARVALDI A.E. & LOIÁCONO M.S. 1994. First instar larvae in the tribe Naupactini (Coleoptera, Curculionidae). Revista Brasileira de Entomologia 38(2): 453-466.
  • LANTERI A.A. & MARVALDI A.E. 1995. Graphognathus Buchanan, a new synonym of Naupactus Dejean, and systematics of the N. leucoloma species group (Coleoptera: Curculionidae). The Coleopterists Bulletin 49(3): 206-228.
  • ALZUGARAY R. ET AL. 1998. Situación de los insectos del suelo en Uruguay. In: Morón, M.A., Aragón A. (eds.). Avances en el estudio de la diversidad, importancia y manejo de los Coleópteros edafícolas americanos. Publicación Especial, Universidad Nacional Autónoma de Puebla, Sociedad Mexicana de Entomología, pp. 151-164.
  • MARVALDI A.E. 1998. Larvae of South American Entimini (Coleoptera: Curculionidae) and phylogenetic implications of certain characters. Revista Chilena de Entomología 25: 21-44.
  • MARVALDI A.E. 1999. Eggs and oviposition habits in Entimini (Coleoptera: Curculionidae). The Coleopterists Bulletin 53(2): 115-126.
  • LANTERI A.A. ET AL. 2002a. Gorgojos de la Argentina y sus plantas huéspedes. Tomo I: Apionidae y Curculionidae. Publicación Especial de la Sociedad Entomológica Argentina Nº 1, 98 pp.
  • RODRIGUERO M.S. ET AL. 2010a. Wolbachia infection in the tribe Naupactini: association between thelytokous parthenogenesis and infection status. Insect Molecular Biology 19(5): 599-705.
  • GUZMÁN N.V. ET AL. 2012. Colonization ability of two invasive weevils with different reproductive modes. Evolutionary Ecology 26 (6): 1371-1390. DOI 10.1007/s10682-012-9564-4.
  • LANTERI A.A. ET AL. 2013a. On the presence of six species of Naupactini damaging soybean in Brazil. Neotropical Entomology 42: 325-327.
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