Les larves des Scarabaeoidea (Insecta, Coleoptera) en riziculture pluviale des régions de haute et moyenne altitudes du Centre de Madagascar

Randriamanantsoa, Richard; Aberlenc, Henri-Pierre; Ralisoa, O.; Ratnadass, Alain; Vercambre, Bernard

doi:10.5252/z2010n1a2

Cited by 481 publications

(12 citation statements)

References 4 publications

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“…The study of a female would reveal sexual dimorphism of this taxon. Especially important would be the study of premature stages because the larvae of the New World taxa, at least the genus Aegidium , differ significantly from those of the Old World taxa (Barbero and Palestrini 1993; Morón 1991; Paulian and Lumaret 1982; Randriamanantsoa et al 2010). …”

Section: Discussionmentioning

confidence: 99%

Stenosternus Karsch, a possible link between Neotropical and Afrotropical Orphninae (Coleoptera, Scarabaeidae)

Frolov¹

2013

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The monotypical orphnine genus Stenosternus Karsch is known from a single specimen of Stenosternus costatus collected on the São Tomé island (Gulf of Guinea). The holotype of Stenosternus costatus Karsch is re-examined and its characters are discussed and illustrated. Although the genus was implicitly placed by Paulian (1984) in the Old World tribe Orphnini Erichson, re-examination of the holotype of Stenosternus costatus shows that it has characters similar to those of the members of the New World tribe Aegidiini Paulian. Placement of Stenosternus in the Aegidiini is supported by the metepisternum widened posteriorly (forming posterior metepisternal lock for closed elytra) and a keel separating basal and anterolateral parts of propleurae. Relationships of Stenosternus with other orphnine taxa and possible ways of origin of São Toméan orphnine fauna are discussed.

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Section: Discussionmentioning

confidence: 99%

Stenosternus Karsch, a possible link between Neotropical and Afrotropical Orphninae (Coleoptera, Scarabaeidae)

Frolov¹

2013

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“…The majority of the species are probably forest litter dwellers at all development stages. Exception to this might be the secondary adaptation to feeding on crops as has been reported for the larvae of Triodontus nitidulus (Randriamanantsoa et al 2010).…”

Section: Natural History Of the Madagascan Orphninaementioning

confidence: 93%

Review of the Madagascan Orphninae (Coleoptera: Scarabaeidae) with a revision of the genus Triodontus Westwood

Frolov

Montreuil

Akhmetova

2016

Zootaxa

846

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The subfamily Orphninae (Coleoptera: Scarabaeidae) is reviewed from Madagascar. A total of four genera and 39 species were found, all being endemic to the island. The following five new species are described: Triodontus ankarafantsikae, Triodontus lemoulti, Triodontus viettei, Triodontus fairmairei, and Triodontus inexpectatus. The following new synonymies are proposed: Orphnus nigrita Brancsik, 1893 is synonym of Triodontus hova (Fairmaire, 1868); Triodontus occidentalis Paulian, 1977 and Orphnus obsoletus Brancsik, 1893 are synonyms of Triodontus nitidulus (Guérin-Méneville, 1844); Triodontus vadoni Paulian, 1977 and Triodontus perrotorum Paulian, 1977 are synonyms of Triodontus owas Westwood, 1852. Lectotypes are designated for the following names: Orphnus nitidulus Guérin-Méneville, 1844 and Orphnidius modestus Benderitter, 1914. Keys, descriptions, illustrations of habitus and male genitalia, and distributional records maps are given for all species.

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“…Un grand nombre d'espèces de larves ont été identifiées. Cependant, elles ne sont pas toutes des ravageurs du riz (Randriamanantsoa et al, 2010).…”

Section: Contraintes Biotiquesunclassified

Upland rice varieties for the highlands of Madagascar: Review of a 25-year-long breeding program

Raboin¹,

Ramanantsoanirina²,

Dzido³

et al. 2013

Cahiers Agricultures

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À Madagascar, le riz est à la fois la culture principale et l'aliment de base de la population. La région des Hautes Terres est densément peuplée et ses agriculteurs cultivent traditionnellement du riz irrigué. Mais il n'y a plus de surfaces disponibles pour l'aménagement de nouvelles rizières. Pour répondre à la demande croissante de riz, le Centre national malgache de recherche appliquée au développement rural (ou FOFIFA) et le Centre de coopération internationale en recherche agronomique pour le développement (Cirad) se sont associés au cours des années 1980 pour créer les variétés de riz pluvial adaptées aux conditions d'altitude (au-dessus de 1 300 m). Les premières variétés créées ont été diffusées dès le milieu des années 1990 et ont permis le démarrage de la culture du riz pluvial dans les zones d'altitude du Vakinankaratra. Malheureusement, la pyriculariose a rapidement surmonté la résistance de la plupart de ces premières variétés à base génétique étroite. Il a donc fallu élargir la base génétique utilisée et prendre en compte la résistance à la pyriculariose comme critère prioritaire de sélection. Une quinzaine de variétés de riz pluvial tolérantes au froid ont été sélectionnées et proposées à la diffusion ; elles ont permis de repousser la frontière de la culture du riz pluvial au-delà de 1 800 m d'altitude. Vingt-cinq ans plus tard, le riz pluvial est visible partout dans le paysage. Nous présentons ici un bilan général du programme d'amélioration variétale du riz pluvial d'altitude, les dernières évolutions de ce programme ainsi que les données les plus récentes sur la diffusion de la riziculture pluviale sur les Hautes Terres centrales. AbstractUpland rice varieties for the highlands of Madagascar: Review of a 25-year-long breeding programIn Madagascar, rice is a staple crop and food. The highland region is densely populated. Farmers traditionally grow irrigated rice. However, further expansion of new irrigated rice fields is almost impossible. In order to meet the growing demand for rice, FOFIFA and CIRAD joined efforts in the 80s to create upland rice varieties adapted to high altitudes (above 1,300m). The first varieties bred were released as early as the mid 1990s and allowed the beginning of upland rice cultivation in the high altitude areas of Vakinankaratra. Unfortunately, blast disease rapidly bypassed the resistance of these first varieties of narrow genetic basis. The genetic basis was thus broadened with blast resistance being considered as a major selection trait. Since the beginning, about fifteen cold tolerant varieties have been released, pushing the frontier of upland rice cultivation to beyond 1,800m asl. Twenty five years later, starting from zero, upland rice is everywhere in the landscape. We here present the results of the high altitude upland rice varietal improvement program, the last development of this program and the most recent data on upland rice diffusion in the Vakinankaratra region in the central Highlands of Madagascar.

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Les larves des Scarabaeoidea (Insecta, Coleoptera) en riziculture pluviale des régions de haute et moyenne altitudes du Centre de Madagascar

Cited by 481 publications

References 4 publications

Stenosternus Karsch, a possible link between Neotropical and Afrotropical Orphninae (Coleoptera, Scarabaeidae)

Stenosternus Karsch, a possible link between Neotropical and Afrotropical Orphninae (Coleoptera, Scarabaeidae)

Review of the Madagascan Orphninae (Coleoptera: Scarabaeidae) with a revision of the genus Triodontus Westwood

Upland rice varieties for the highlands of Madagascar: Review of a 25-year-long breeding program

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