Distribution, host range, and climatic constraints on Centistes gasseni (Hymenoptera: Braconidae), a South American parasitoid of cucumber beetles, Diabrotica spp. (Coleoptera: Chrysomelidae)

The genus Diabrotica includes a large number of pest species, including some of the most important crop pests of the Americas. The parasitoid Centistes gasseni Shaw is the first braconid to be described parasitizing Diabrotica in South America, and high natural infestations are reported. Field and e...

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Veröffentlicht in:Bulletin of entomological research 2003-12, Vol.93 (6), p.561-567
Hauptverfasser: Walsh, G. Cabrera, Athanas, M.M., Salles, L.A.B., Schroder, R.F.W.
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container_issue 6
container_start_page 561
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creator Walsh, G. Cabrera
Athanas, M.M.
Salles, L.A.B.
Schroder, R.F.W.
description The genus Diabrotica includes a large number of pest species, including some of the most important crop pests of the Americas. The parasitoid Centistes gasseni Shaw is the first braconid to be described parasitizing Diabrotica in South America, and high natural infestations are reported. Field and experimental observations on the host range, distribution and biology of this parasitoid are described. Centistes gasseni was collected in southern Brazil, eastern Paraguay and northeastern Argentina, in a region comprising humid lowlands and highlands, and cool temperate to warm subtropical climates, with regular rainfall in excess of 1300 mm. Three Diabrotica species, D. limitata (Sahlberg), D. speciosa (Germar) and D. viridula (Fabricius) were found to host the parasitoid, with mean percent parasitism of 5.4, 2.0 and 1.0%, respectively. Diabrotica speciosa and D. viridula are the two most important pest Diabrotica species in South America. Laboratory experiments with field-collected beetles and parasitoid cocoons indicated that C. gasseni overwinters in adult host beetles, remaining dormant in its live host below developmental temperatures. A potential distribution of C. gasseni in North America is proposed based on its known climatic range and the distribution of the main pest species of adult overwintering North American Diabrotica.
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A potential distribution of C. gasseni in North America is proposed based on its known climatic range and the distribution of the main pest species of adult overwintering North American Diabrotica.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><pmid>14704103</pmid><doi>10.1079/BER2003263</doi><tpages>7</tpages></addata></record>
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subjects Animals
Bats
Biological and medical sciences
Biological control
Braconidae
Centistes gasseni
Chrysomelidae
Climate
Coleoptera - parasitology
Control
Demography
Diabrotica
Female
Fundamental and applied biological sciences. Psychology
Host-Parasite Interactions
Hymenoptera - growth & development
Hymenoptera - physiology
Laboratories
Male
Mosses
North America
Overwintering
Parasitism
Pests
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
South America
title Distribution, host range, and climatic constraints on Centistes gasseni (Hymenoptera: Braconidae), a South American parasitoid of cucumber beetles, Diabrotica spp. (Coleoptera: Chrysomelidae)
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