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Subfamily Bruchinae - Pea and Bean Weevils

 
 
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The genera of seed-beetles (Coleoptera: Bruchidae)
By Borowiec, L.
Polskie Pismo Entomologiczne 57: 3 - 207, 1987
available on Research Gate

The Bean Weevils (Coleoptera: Chrysomelidae: Bruchinae) of Atlantic Canada
By Majka C.G., Langor D.
J. Acad. Entomol. Soc. 7: 75-82, 2011

Handbook of the Bruchidae of the United States and Canada
By Kingsolver J.M.
USDA Tech. Bull. 1912 (2 vols.), 2004
The standard identification manual and a complete revision of our fauna. Vol. 2 provides habitus and diagnostic detail illustrations of each species
Full text

What limits predation rates by the specialist seed‐feeder Penthobruchus germaini on an invasive shrub?
By van Klinken, R.D. and L.K. Flack.
Journal of Applied Ecology 45(6): 1600-1611., 2008
JSTOR

van Klinken, R.D. and L.K. Flack. 2008. What limits predation rates by the specialist seed‐feeder Penthobruchus germaini on an invasive shrub? Journal of Applied Ecology 45(6): 1600-1611.

Abstract

1. Specialist seed-feeders are widely used in weed biological control, but seed predation rates are frequently insufficient to cause the required impacts. Understanding the underlying reasons is prerequisite to predicting efficacy.

2. We conducted continental-scale surveys of an introduced, multi-voltine seed-feeder [Bruchidae: Penthobruchus germaini (Pic.)] on an invasive legume (Caesalpinaceae: Parkinsonia aculeata L.). We tested three hypotheses as to what limits seed predation; namely, seed escape through egg aggregation, mortality of immature beetle stages, and failure to track temporal fluctuations in resource availability. We also tested how these factors interacted with the environment and each other.

¿De dónde son? Provenance of a South American species of seed beetle new to California.
By Trujillo, S., J.B. Deas, G.E. Morse.
Conference: Entomological Society of America Annual Meeting 2014., 2014
ResearchGate

Trujillo, S., J.B. Deas, G.E. Morse. 2014. ¿De dónde son? Provenance of a South American species of seed beetle new to California. Conference: Entomological Society of America Annual Meeting 2014.

Abstract

In 2012 an infestation of unfamiliar seed beetles was discovered in eastern California feeding within the seeds of Mexican palo verde (Parkinsonia aculeata). These turned out to be a species native to South America, Penthobruchus germaini (Coleoptera: Chrysomelidae: Bruchinae).

Biology and field observations of Penthobruchus germaini (Coleoptera: Bruchidae), biological control [of] Parkinsonia aculeata
By Briano, J.A. H.A. Cordo, and C.J. Deloach.
Biological Control 24: 292-299., 2002
Full PDF

Briano, J.A. H.A. Cordo, and C.J. Deloach. 2002. Biology and field observations of Penthobruchus germaini (Coleoptera: Bruchidae), a biological control agent for Parkinsonia aculeata (Caesalpiniaceae). Biological Control 24: 292-299.

Abstract

The life cycle of the bruchid beetle Penthobruchus germaini (Pic) was studied in the laboratory and some field observations were recorded. Most adults (90.5%) emerged from the seeds of Parkinsonia aculeata L. by making an exit hole at the end of the seed opposite the radicle. Adult longevity with different food types ranged from 11.2 to 59 days and oviposition from 22 to 348 eggs per female. Females laid an average of 2 eggs per day during their life span. The life cycle (oviposition to adult emergence) was completed in 38.7 days at 30C in the laboratory, including 8.6 days for the egg stage, 21.8 for the larval stage, and 8.3 for the pupal stage. The larval stage had four instars. Larvae destroyed the seeds by consuming 90–100% of the cotyledons, preventing germination. They pupated inside the seeds, and only one adult emerged per seed. At three field sites, 48% of the pods were found to have eggs; the mean number of eggs per seed was 0.37 and per pod was 0.98. Females preferred the swelling of the pod as oviposition site. Mature (purple) and larger pods contained more eggs than immature (green) and smaller pods. Larvae overwintered in the seeds on the ground, began pupating in late winter, and adults emerged in the spring. Depending on plant phenology, two generations per year are possible. Natural parasitism of P. germaini was

Description of a new genus and a new species of Bruchidae from South America (Coleoptera).
By Kingsolver, J.M.
Journal of the Washington Academy of Sciences 63(4): 142-146., 1973
Full Text - BHL

Kingsolver, J.M. 1973. Description of a new genus and a new species of Bruchidae from South America (Coleoptera). Journal of the Washington Academy of Sciences 63(4): 142-146.

Abstract

Penthobruchus, new genus, is described for Pachymerus germaini Pic and a new species, cercidicola, both from South America. Illustrations of salient characters are included.

A key to American genus Merobruchus Bridwell (Coleoptera: Chrysomelidae: Bruchinae) with descriptions of species and ...
By Daiara Manfio, Cibele Stramare Ribeiro-Costa
Zootaxa 4078 (1): 284-319, 2016
Full title: A key to American genus Merobruchus Bridwell (Coleoptera: Chrysomelidae: Bruchinae) with descriptions of species and two new host plant records for the subfamily
Full text (PDF}

 
 
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