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Diabrotica speciosa

Diabrotica speciosa

Vaquita de San Antonio

Family: Chrysomelidae
Order: Coleoptera
Class: Insecta
Phylum / Division: Arthropoda
Kingdom: Animalia

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Records from Santo Tomé


Description


Is a small, oval-bodied chrysomelid beetle that reaches an average length of 5.5 to 7.3 millimeters in its adult stage. The dorsal coloration of the elytra is a vibrant grass-green, strikingly patterned with six bright yellow spots arranged symmetrically, three on each elytron. The head typically ranges from reddish-brown to dark black, supporting dark, filiform antennae that measure up to two-thirds of the total body length. The pronotum is light green, smooth, and slightly convex, while the legs are mostly dark brown or black, adapted for rapid movement across various plant surfaces.

Geographical distribution: Occurs widely across the Neotropical region of South America. It is extremely common and highly documented in Brazil, Argentina, Uruguay, Paraguay, Bolivia, Peru, and Colombia. Its range has expanded continuously over recent decades, largely driven by the expansion of agricultural frontiers and the trade of host crops throughout the continent.

Habitat: Thrives predominantly in human-modified landscapes, including intensive agricultural fields, commercial orchards, home gardens, and disturbed grasslands. While showing high ecological plasticity, this species prefers temperate and tropical regions with moderate to high humidity and a constant supply of host plants, avoiding extreme alpine elevations or hyper-arid desert zones.

Feeding: Exhibits a highly polyphagous feeding behavior that differs significantly between developmental stages. Adults are folivorous, feeding on leaves, young shoots, flowers, and fruits of a wide variety of plant families, particularly Cucurbitaceae, Fabaceae, Solanaceae, and Poaceae. In contrast, the subterranean larvae feed strictly on the root systems of both monocots and dicots, displaying a strong preference for the roots of maize (Zea mays), which often leads to severe crop damage.

Behavior: Manifests strictly diurnal activity patterns, with peaks of movement and feeding occurring during the cooler morning and late afternoon hours. It is an active flier capable of short to medium-distance flights to locate fresh feeding sites or escape unfavorable microclimates. When disturbed by physical contact or potential predators, it frequently exhibits thanatosis, dropping off host leaves onto the soil and remaining motionless to blend with the debris.

Reproduction: The reproductive process begins with courtship and mating on the host plant foliage. Following fertilization, the female crawls down to the soil surface to deposit small clutches of pale yellow, elliptical eggs in moist crevices near the roots of suitable hosts. Once hatched, the subterranean larvae progress through three distinct instars over several weeks before constructing an underground pupal cell, completing its development from egg to adult in approximately 30 to 40 days under optimal warm temperatures.

Conservation status: Given its status as a major agricultural pest with highly stable and dense populations, it has not been evaluated by the International Union for Conservation of Nature (IUCN). Rather than facing conservation threats, this species is the focus of intense pest management strategies, including biological control and chemical applications, designed to suppress its populations in agricultural regions.



Compilation and publication: EcoRegistros – 25/08/2026




Geographic distribution


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Species photographs

Last published photographs

Foto
Photography ID: 462701
  Adult

Santo Tomé
Santa Fe
Argentina
10/08/2017
Eduardo Beltrocco
Foto
Photography ID: 444404
  Adult

Santo Tomé
Santa Fe
Argentina
05/01/2021
Eduardo Beltrocco
Foto
Photography ID: 441839
  Adult

Santo Tomé
Santa Fe
Argentina
04/20/2021
Eduardo Beltrocco
Foto
Photography ID: 441807
  Adult

Santo Tomé
Santa Fe
Argentina
04/19/2021
Eduardo Beltrocco
Foto
Photography ID: 438248
  Adult

Santo Tomé
Santa Fe
Argentina
03/20/2021
Eduardo Beltrocco
Foto
Photography ID: 420649
  Adult

Santo Tomé
Santa Fe
Argentina
04/25/2020
Eduardo Beltrocco
Foto
Photography ID: 418940
  Adult

Santo Tomé
Santa Fe
Argentina
05/29/2020
Eduardo Beltrocco
Foto
Photography ID: 394650
  Adult

Santo Tomé
Santa Fe
Argentina
04/13/2020
Leila Lodi
Foto
Photography ID: 368481
  Adult

Santo Tomé
Santa Fe
Argentina
12/15/2019
Eduardo Beltrocco
Foto
Photography ID: 352544
  Adult

Santo Tomé
Santa Fe
Argentina
07/05/2019
Eduardo Beltrocco
Foto
Photography ID: 324134
  Adult

Santo Tomé
Santa Fe
Argentina
12/30/2018
Eduardo Beltrocco
Foto
Photography ID: 234442
 
Santo Tomé
Santa Fe
Argentina
11/23/2017
Eduardo Beltrocco



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 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
190521604/11/2023ArgentinaSanta FeLa Rioja 1109, Santo Tomé1Gustavo Fernando Durán
182658316/09/2023ArgentinaSanta FeLa Rioja 1109, Santo Tomé1Gustavo Fernando Durán
140248901/05/2021ArgentinaSanta FeParque Martin Miguel de Güemes, Santo ToméEduardo Beltrocco
139583020/04/2021ArgentinaSanta FeSarmiento y Centenario, Santo ToméEduardo Beltrocco
139575319/04/2021ArgentinaSanta FeSarmiento y Centenario, Santo ToméEduardo Beltrocco
139364013/04/2021ArgentinaSanta FeMitre entre Balcarce y Arenales, Santo Tomé1Eduardo Beltrocco
138514420/03/2021ArgentinaSanta FeSarmiento y Centenario, Santo ToméEduardo Beltrocco
131038429/05/2020ArgentinaSanta FeHumedal lindante al Rio Salado, Santo ToméEduardo Beltrocco
131599025/04/2020ArgentinaSanta FeSarmiento y Centenario, Santo ToméEduardo Beltrocco
123573613/04/2020ArgentinaSanta FeSarmiento y Centenario, Santo Tomé1Leila Lodi
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Diabrotica speciosa – Species account. Accessed from www.ecoregistros.org on 26/09/2026.