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See detailIdentification des indicateurs de dégradation de la forêt de tapia (Uapaca bojeri) par une analyse sylvicole
Rakotondrasoa, OL; Malaisse, François ULg; Rajoelison, G et al

in Tropicultura (2013), 31(1), 10-19

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See detailThe chemical ecology of Harmonia axyridis
Sloggett, John; Magro, Alexandra; Verheggen, François ULg et al

in Bulletin OILB/SROP = IOBC/WPRS Bulletin (2013), 94

In the recent SI of BioControl and resultant book from this working group (Roy et al., 2012), we contributed a review paper on the chemical ecology of the invasive aphidophagous ladybird Harmonia axyridis ... [more ▼]

In the recent SI of BioControl and resultant book from this working group (Roy et al., 2012), we contributed a review paper on the chemical ecology of the invasive aphidophagous ladybird Harmonia axyridis (Sloggett et al., 2011). This paper focused on both the pure and applied aspects of this subject, including sections on: (1) chemical defence; (2) foods, feeding and reproduction; (3) H. axyridis chemistry, humans and human activity, and (4) future research perspectives [less ▲]

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See detailAggregation behaviour of Harmonia axyridis
Durieux, Delphine ULg; Fischer, Christophe ULg; Fassotte, Bérénice ULg et al

in Bulletin OILB/SROP = IOBC/WPRS Bulletin (2013), 94

The multicoloured Asian ladybeetle, Harmonia axyridis (Coleoptera: Coccinellidae), forms large aggregations inside dwellings to survive cold winters. The species’ migratory flight is well documented ... [more ▼]

The multicoloured Asian ladybeetle, Harmonia axyridis (Coleoptera: Coccinellidae), forms large aggregations inside dwellings to survive cold winters. The species’ migratory flight is well documented. Harmonia axyridis preferentially moves towards prominent and visually contrasting elements (Obata, 1986; Nalepa et al., 2005). However, the mechanisms involved in the selection of aggregation sites are misunderstood. The work presented here was devoted to the study of chemicals used by H. axyridis during its aggregation process. During sampling of infested dwellings, non-volatile compounds were collected from aggregation sites. Gas chromatrography-mass spectometry (GC-MS) analyses showed that the chemicals found on the substrate where the beetles aggregate were different from the ones collected around these aggregation sites. These two blends are made up of the same long-chain hydrocarbons, comprising saturated and unsaturated homologues, but they are quantitatively different, the blend collected directly on the overwintering sites containing a higher proportion of saturated compounds than the other one. Behavioural experiments, involving overwintering H. axyridis individuals, were then conducted in the laboratory to understand the roles of these chemicals in aggregation. Firstly, an aggregation assay using the blend collected inside overwintering sites showed a clear preference of ladybeetles for areas containing these compounds, highlighting the retention capacity of the blend on H. axyridis. On the other hand, a Y-shaped tube assay, using the chemical blend found around the sites, showed that those compounds are used by male and female congeners as cues, allowing individuals to orientate towards the side of the set-up containing the tested chemicals. These results suggest the use of two different area markings by H. axyridis during its aggregation: the first one to lead congeners towards aggregation sites, and the second to ensure the cohesion of the cluster. Additional investigations were conducted to study the influence of (1) the presence of congeners and (2) the shelters’ luminosity on the H. axyridis decision to settle and aggregate under shelters. A binary choice experiment conducted in the laboratory under non-wintering conditions showed that the multicoloured Asian ladybeetles present a permanent aggregative behaviour, as a result of the existence of social interactions. These experiments also highlighted the clear preference of H. axyridis for dark shelters. [less ▲]

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See detailLa soie naturelle des Hauts-Plateaux de Madagascar: les facteur socio-institutionnels entravant une filière dynamique et pérenne
Rabearisoa, Misha; Ramamonjisoa, Bruno; Poncelet, Marc ULg et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Despite the cultural, social and socio-economic importance for societies situated in the Highlands of Madagascar, the endemic silk moth Borocera cajani and its habitat Uapaca bojeri are endangered by many ... [more ▼]

Despite the cultural, social and socio-economic importance for societies situated in the Highlands of Madagascar, the endemic silk moth Borocera cajani and its habitat Uapaca bojeri are endangered by many factors. In order to sustainably manage these resources, the silk production chain has been studied combining economic and socio-anthropologic approaches. Silk chain production analysis situates the underlying rural realities in an economic context; socio-anthropological considerations link those economic factors to their social context. The current study focuses on decentralized natural resource management in Itasy and Amoron’i Mania. It appears that institutional, economic and social factors tend to determine silk moth production chain dynamics. Considering all of these parameters and their interactions is considered crucial for a sustainable management of these endangered resources. [less ▲]

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See detailInfluence des reboisements d'eucalyptus (Eucalyptus robusta) et de pin (Pinus kesiya) sur la régénération naturelle de tapia (Uapaca bojeri) en forêt d'Arivonimamo
Rakotondrasoa, Olivia Lovanirina; Stein, Julien; Ayral, Astrid et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Confronted with the ongoing degradation of the tapia woodlands (Uapaca bojeri), reforestation by Pinus sp. and Eucalyptus sp.was considered as an alternative in Arivonimamo to substitute tapia for the ... [more ▼]

Confronted with the ongoing degradation of the tapia woodlands (Uapaca bojeri), reforestation by Pinus sp. and Eucalyptus sp.was considered as an alternative in Arivonimamo to substitute tapia for the production of firewood. However, the invasion by these alien species is actually considered as one of the threats to the tapia woodland in Madagascar. In this context, this study aimed to analyze the regeneration of the tapia woodlands in Arivonimamo. Consequently, “contact zones” between stands of exotic species, Pinus kesiya or Eucalyptus robusta, and U. bojeri were identified, in order to study tree regeneration along transects in each cardinal direction starting inside the exotic forests and continuing into the native populations. This study showed that the density of tapia regeneration varied between sites. It also appeared that the capacity of P. kesiya to invade the tapia woodland is much higher than for E. robusta. Moreover, the regeneration of pine inside the pine’s plantations was rather low. In addition, it was observed that the canopy opening rate had no significant influence on the development of the regeneration of the three species involved. Differences in canopy opening are due to various human activities such as the collection of non-timber forest products (tapia), the forestry operation of cleaning (pine) and early cutting (eucalyptus). [less ▲]

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See detailIdentification des indicateurs de dégradation de la forêt de tapia (Uapaca bojeri) par une analyse sylvicole
Rakotondrasoa, Olivia Lovanirina; Malaisse, François ULg; Rajoelison, Gabrielle Lalanirina et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Deforestation is a serious problem in Madagascar leading to natural resource degradation. In this context, this study aims to identify indicators of forest degradation for the tapia forest of Arivonimamo ... [more ▼]

Deforestation is a serious problem in Madagascar leading to natural resource degradation. In this context, this study aims to identify indicators of forest degradation for the tapia forest of Arivonimamo. A forest map of the area consists of a document in which the forest is stratified into two types: degraded tapia forest and highly degraded tapia forest. The approach consisted of the comparison of these two types of forest, the degraded tapia being the reference. Data collection was based on a forest inventory through discontinuous transects related to the structure of the tapia forest, with a total length of 1,500 m per type. It appears that tree density, average tree height, average tree diameter, basal area and density of regeneration and undergrowth, are indicators for the identification of the state of degradation of the tapia forest. The distribution of U. bojeri is aggregated in both sites; however, the degree of aggregation is significantly higher in the highly degraded forest in response to the lower tree density. Leptolaena pauciflora and Erica sp. are the main undergrowth indicator species of degradation; their abundance is correlated with degradation. Knowledge of these indicators of tapia degradation will provide guidance and technical tools to improve evaluation and monitoring of the degradation of the tapia forest. [less ▲]

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See detailLes bois de Tapia de Madagascar: approches phytogéographique, floristique et écologique
Malaisse, François ULg; Pinel, Romain; Razafimanantsoa, Tsiresy Maminiaina et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

This chapter has three objectives. Firstly, it is emphasized that tapia-dominated areas are spatially distributed into four localities situated on the so-called “Highlands”. Secondly, based on a global ... [more ▼]

This chapter has three objectives. Firstly, it is emphasized that tapia-dominated areas are spatially distributed into four localities situated on the so-called “Highlands”. Secondly, based on a global survey of available literature on tapia vegetation as well as on floristic surveys carried out in two entities (Arivonimamo et Ambatofinandrahana), an actualized list of their floristic diversity is composed. This list is partially illustrated with photographs and plates on a CD-ROM; vernacular names of the considered taxa are quoted. Finally a preliminary ecological interpretation is given based on the vegetation units and (or) ecological niches which are schematically represented. [less ▲]

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See detailLa forêt de tapia, écosystème endémique de Madagascar : écologie, fonctions, causes de dégradation et de transformation (synthèse bibliographique)
Rakotondrasoa, Olivia Lovanirina; Malaisse, François ULg; Rajoelison, Gabrielle Lalanirina et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

This article presents an overview of the tapia forest (Uapaca bojeri Baill.) in Madagascar in order to emphasize its importance for the development of the local population through improving household ... [more ▼]

This article presents an overview of the tapia forest (Uapaca bojeri Baill.) in Madagascar in order to emphasize its importance for the development of the local population through improving household incomes. The tapia forest is a “socio-natural” formation, quasi-monospecific with regard to the tree stratum and endemic to Madagascar. It is only located in the Highlands of Madagascar. Alongside its ecosystem functions, the tapia forest hosts various resources, including non-timber forest products as well as timber itself, all of which play an important role in the informal local economy. However, the tapia ecosystem is threatened by human destruction through bush fires, production of firewood and charcoal, agriculture expansion, and by invasion of exotic species introduced for the purposes of reforestation. Subsequently, the sustainable management and protection of the tapia forest is essential in order to enable local populations to reap its benefits across several generations. [less ▲]

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See detailInfluence de la plante hôte sur le développement larvaire de Borocera cajani (Lepidoptera: Lasiocampidae)
Razafimanantsoa, Tsiresy; Malaisse, François ULg; Raminosoa, Noromalala et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Borocera cajani Vinson (Lepidoptera: Lasiocampidae) is a silk moth endemic to Madagascar that is currently used to produce silk textiles. This silk moth is polyphagous and colonizes forests situated in ... [more ▼]

Borocera cajani Vinson (Lepidoptera: Lasiocampidae) is a silk moth endemic to Madagascar that is currently used to produce silk textiles. This silk moth is polyphagous and colonizes forests situated in the central Highlands, mainly constituted by tapia trees (Uapaca bojeri). Two host plants are commonly used by the caterpillar of this moth species: tapia and voafotsy (Aphloia theiformis). In this work we have evaluated parameters of different stages (survival rate, development duration, weight and size, fecundity, etc.) of B. cajani on both host plants. We have observed a 30% higher survival rate on U. bojeri. Larval and pupae duration were shorter on U. bojeri (64,8 ± 1,5 days) than on A. theiformis (87,4 ± 2,0 days). Cocoons were bigger when obtained from larvae fed on U. bojeri. This plant is therefore better for the development of B. cajani and should be used in intensive rearing of this silk moth. [less ▲]

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See detailSilk moths inventory in their natural tapia forest habitat (Madagascar): diversity, population dynamic and host plants
Razafimanantsoa, Tsiresy; Raminosoa, Noromalala; Rakotodrasoa, Olivia et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Endemic silk moths (Lepidoptera: Lasiocampidae) in Madagascar have been collected and exploited for centuries by local populations either for food or as a source of silk cocoons from which textiles are ... [more ▼]

Endemic silk moths (Lepidoptera: Lasiocampidae) in Madagascar have been collected and exploited for centuries by local populations either for food or as a source of silk cocoons from which textiles are made. Moth natural forest habitat has also been degraded, leading to a drastic decrease in silk moth populations. However, very few scientific reports highlighted these observations well known by the local people. We have inventoried silk moths species in tapia (Uapaca bojeri Baill.) forests located in the central Highlands of Madagascar. Inventories have been conducted during one year from August 2009 to July 2010 by sampling transects in Imamo forests. Three species of Lasiocampidae belonging to two genera were found: Borocera cajani Vinson, Borocera marginepunctata Guérin-Méneville and Europtera punctillata Guenée. These three silk moth species are endemic to Madagascar but only one (B. cajani) is commercially exploited in the silk industry. The habitat, host plants, abundance, life cycle and feeding behaviour of these species in their natural habitat are described. [less ▲]

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See detailSilk moths in Madagascar: a review of the biology, uses, and challenges related to Borocera cajani (Vinson, 1863) (Lepidoptera: Lasiocampidae)
Razafimanantsoa, Tsiresy; Rajoelison, Gabrielle; Ramamonjisoa, Bruno et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Borocera cajani ou landibe (nom vernaculaire) est l’un des papillons séricigènes sauvages dont la soie est la plus utilisée dans le domaine textile de Madagascar. Cette espèce endémique s’observe dans ... [more ▼]

Borocera cajani ou landibe (nom vernaculaire) est l’un des papillons séricigènes sauvages dont la soie est la plus utilisée dans le domaine textile de Madagascar. Cette espèce endémique s’observe dans toute l’île, mais colonise particulièrement la forêt de Uapaca bojeri ou forêt de « tapia » des Hautes Terres centrales. La forêt fournit les aliments à B. cajani tels que les feuilles de U. bojeri. L’espèce secrète la soie quand elle entre en nymphose et construit son cocon. Borocera cajani et son habitat naturel sont menacés par les destructions de l’Homme telles que les feux de brousse, la collecte de bois de chauffage, la production de charbon de bois et la surexploitation de leurs cocons. La production de soie sauvage est en constante diminution, alors que la filière soie implique beaucoup de gens dans l’île comme les collecteurs des cocons, les fileurs, les teinturiers, les tisseurs et les artistes qui transforment la soie en habits, en accessoires et objets. Revitaliser la filière soie est un moyen de favoriser la conservation de cette ressource naturelle et de son habitat forestier. [less ▲]

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See detailTissu social, coopérations et conflits entre les acteurs de la filière soie de landibe dans la région d’Itasy
Diez, Lise; Poncelet, Marc ULg; Rakotoniaina, Naritiana et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Wild silk in Madagascar is made by endemic silk moths of the genus Borocera and locally named landibe. In this study, we tried to shed light on the social aspects of the wild silk sector, by understanding ... [more ▼]

Wild silk in Madagascar is made by endemic silk moths of the genus Borocera and locally named landibe. In this study, we tried to shed light on the social aspects of the wild silk sector, by understanding the interactions between the actors of the sector. We interviewed different professionals such as weavers and cocoon harvesters in the country and in the city. The study area was located in villages of the Itasy region, situated 50 km West of the capital, Antananarivo. Moreover, people working in the silk sector were also interviewed in Antananarivo. Analysis of the wild silk’s sector revealed complex dynamics. Each player has his own purpose, not the least of which is finding additional revenues with silk. In the country, cocoon harvesting and weaving are complementary activities to agriculture. The collective actors of the silk sector are the VOI (Local Communities) who are managing tapia woods, weaving women associations, and NGOs who try to develop silk sector in the region. These collective actors cooperate with the local population, but it appears that some conflicts and misunderstandings arise between individuals and associations, which could hamper meeting the shared goals of silk sector development and preservation of the natural environment. [less ▲]

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See detailPlace de la soie de landibe dans l’économie rurale de la région d’Arivonimamo
Diez, Lise; Poncelet, Marc ULg; Rakotoniaina, Naritiana et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Wild silk in Madagascar is produced by endemic silk moths of the genus Borocera, locally named landibe. Wild silk is used to produce shrouds and clothes, and provides a great added value. In this document ... [more ▼]

Wild silk in Madagascar is produced by endemic silk moths of the genus Borocera, locally named landibe. Wild silk is used to produce shrouds and clothes, and provides a great added value. In this document, we describe the silk sector in the Arivinimamo region, and we analyze the importance of silk production and transformation as a source of income for rural populations, as observed in 2008. First, the harvest of cocoons does not require any investment and weaving pays more than working as a field hand. In the study area, wild silk brings significant profits to households. In Antananarivo, workshops employ many weavers. Consequently, wild silk is quite important for the region’s employment. However, these activities still belong to the informal sector and it is quite difficult to know the real impact of the sector on the national economy. Wild silk products are mostly sold in Antananarivo, at outdoor marketplaces or in specialized shops. Nowadays, the principal problem of the wild silk enterprise is finding markets. The economic crisis in the country diminishes demand as well as investment possibilities for weavers and enterprises. [less ▲]

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See detailLa soie de landibe : connaissances biologiques et savoir-faire des populations rurales de la région d’Arivonimamo
Diez, Lise; Poncelet, Marc ULg; Rakotoniaina, Naritiana et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Wild silk in Madagascar is made by endemic silk moths of the genus Borocera, locally named landibe. For centuries, wild silk has been woven in Madagascar to dress the more powerful islanders or shroud the ... [more ▼]

Wild silk in Madagascar is made by endemic silk moths of the genus Borocera, locally named landibe. For centuries, wild silk has been woven in Madagascar to dress the more powerful islanders or shroud the ancestors at the time of first and second burials. Nowadays, it is mostly wealthy malagasy and foreigners who buy and wear wild silk. By interviewing the cocoon harvesters in the rural region of Arivonimamo, we aimed at a better understanding of their knowledge of the butterflies’ biology and rearing methods. We also interviewed persons implied in the silk sector to describe the techniques that are presently used in silk transformation. In Arivonimamo region, Borocera cocoons are directly harvested in tapia (Uapaca bojeri) forests, and wild silk is still processed in a traditional way. [less ▲]

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See detailNocturnal moth inventory in Malagasy tapia woods, with focus on silk-producing species
Barsics, Fanny ULg; Razafimanantsoa, Tsiresy Maminiaina; Minet, Joël et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches. Enjeux écologiques et socio-économiques (2013)

In Madagascar, the tapia woods (Uapaca bojeri) shelter a wide diversity of moth species, among which the landibe, a silk moth of the genus Borocera. Threatened by diverse pressures – anthropogenic and ... [more ▼]

In Madagascar, the tapia woods (Uapaca bojeri) shelter a wide diversity of moth species, among which the landibe, a silk moth of the genus Borocera. Threatened by diverse pressures – anthropogenic and environmental – its populations have drastically decreased during the last twenty years. We report on night inventories by means of light traps, performed in the tapia woods. We observed at least 68 species, notably another silk producing moth, Europtera punctillata, whose caterpillars are called landifotsy by villagers. We unveiled specific behavioural traits of species sampled during four successive night periods, between 8:00 pm and 4:00 am. sixty-eight moth species were observed, some of them are silk producing species, including landifotsy (E. punctillata). [less ▲]

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See detailLes ressources sauvages comestibles des bois de tapias : inventaire des produits connus et consommés par les villageois
Barsics, Fanny ULg; Malaisse, François ULg; Razafimanantsoa, Tsiresy maminiaina et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches. Enjeux écologiques et socio-économiques. (2013)

Les populations des Hautes Terres centrales de Madagascar vivent notamment de ressources abritées par les bois de tapia (Uapaca bojeri Baill.). Parmi celles-ci, des ressources séricigènes servent autant ... [more ▼]

Les populations des Hautes Terres centrales de Madagascar vivent notamment de ressources abritées par les bois de tapia (Uapaca bojeri Baill.). Parmi celles-ci, des ressources séricigènes servent autant dans les traditions qu’au commerce à la fois local et touristique. Le landibe (Borocera cajani Vinson, Lasiocampidae) est l’espèce principale qui permet cette exploitation. Ses chrysalides sont également comestibles. Cette ressource en déclin de par les pressions qu’elle subit, et celles subies par la forêt, est loin d’être la seule abritée par les tapia. Dans ce chapitre, nous dressons une liste de produits sauvages comestibles au moyen d’enquêtes réalisées auprès des villageois, avec pour objectif de souligner l’importance d’actions rapides à entreprendre pour sauvegarder cette biodiversité cruciale dont dépendent les habitants de la régions. [less ▲]

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See detailApport de la surface terrière dans la dénomination des formations végétales dominées par le tapia (Uapaca bojeri) à Madagascar
Malaisse, François ULg; Rakotondrasoa, Olivia; Rakotoniaina, R.T. et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches. Enjeux écologiques et socio-économiques. (2013)

Après avoir rappelé l’intérêt transcendant d’Uapaca bojeri, essence endémique malgache, pour les populations locales et avoir défini l’importance des apports écosystémiques des formations végétales où ... [more ▼]

Après avoir rappelé l’intérêt transcendant d’Uapaca bojeri, essence endémique malgache, pour les populations locales et avoir défini l’importance des apports écosystémiques des formations végétales où cette essence domine, la diversité des dénominations concernant ces dernières est mise en évidence et les causes sous-jacentes en sont analysées. Une situation analogue a été observée antérieurement pour les forêts claires de type miombo en Afrique continentale ; le concept de surface terrière a constitué pour ces dernières un apport pertinent et a autorisé une typologie valorisante des dénominations. Dès lors, l’application du concept de surface terrière aux formations végétales à dominance de tapia est examinée et son apport éventuel discuté. Un système original est proposé. [less ▲]

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See detailLa filière de la soie sauvage à Madagascar : approche socio-économique appliquée à la région d’Arivonimamo
Coulon, Julien; Lebailly, Philippe ULg; Haubruge, Eric ULg et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Madagascar has a long tradition of sericulture based on the use of an endemic moth (Borocera cajani). This insect’s larva, also named landibe by the locals, produces wild silk when cocooning, which can be ... [more ▼]

Madagascar has a long tradition of sericulture based on the use of an endemic moth (Borocera cajani). This insect’s larva, also named landibe by the locals, produces wild silk when cocooning, which can be collected in the tapia forest (Uapaca bojeri), their natural habitat. Technology and know-how related to the production of wild silk is specific to the island. Indeed, the silky products are made by traditional methods due to the limited financial resources of the producers. Technological constraints of the silk spinning require manual floss and weaving on traditional loom. The majority of the Malagasy silk produced is currently distributed nationally in different markets and specialized stores through the country but mainly in Antananarivo. The production volume of silky products is very low. However, these products show outstanding technological, visual and textural properties in comparison with the traditional silk industry in Asia. This socio-economic study is looking at the enhancement of landibe by showing the profitability of the sector during the different stages of production, from the collection of cocoons in the tapia forest to the manufacture of finished silky products. Since several decades, a decrease of the volume of wild silk is observes due to socio-cultural constraints, people change their eating habits and change their farming activities. Environmental constraints have modified the amounts of wild silkworm. [less ▲]

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See detailLes ressources sauvages comestibles des bois de tapias : caractérisation alimentaire des produits consommés
Barsics, Fanny ULg; Malaisse, François ULg; Lognay, Georges ULg et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches. Enjeux écologiques et socio-économiques. (2013)

Les bois de tapia (Uapaca bojeri) des Hautes Terres centrales de Madagascar regorgent de ressources sauvages comestibles utilisées par les populations locales dans leur alimentation régulière. Afin de ... [more ▼]

Les bois de tapia (Uapaca bojeri) des Hautes Terres centrales de Madagascar regorgent de ressources sauvages comestibles utilisées par les populations locales dans leur alimentation régulière. Afin de décrire ces apports en termes biochimiques, nous avons réalisé des analyses de contenu sur 7 ressources, soit 2 chenilles, 1 araignée et 4 champignons comestibles. Leurs taux de protéines, de lipides, ainsi que leur composition en acides aminés et acides gras ont été obtenus. Les résultats ont été exprimés dans l’absolu mais aussi en relation avec les indices alimentaires couramment utilisés pour définir les qualités protéiques et lipidiques des denrées. Ces analyses nous permettent de constater l’excellent apport protéique que représentent les Arthropodes, et mettent également en évidence leur qualité lipidique. Les résultats de ces analyses sont discutés en faisant le lien avec les recommandations de la FAO/OMS. [less ▲]

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See detailPheromone-based management strategies to control the tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae). A review
Caparros Megido, Rudy ULg; Haubruge, Eric ULg; Verheggen, François ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2013), 17(3), 475-482

We here review pheromone control strategies for species-specific and environmentally safe management of the tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae). This insect pest originates from ... [more ▼]

We here review pheromone control strategies for species-specific and environmentally safe management of the tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae). This insect pest originates from South America and is now considered to be one of the most damaging invasive pests of tomatoes in the Mediterranean Basin countries of Europe and North Africa. After presenting the general principles of sex pheromone-based control strategies, we describe strategies used to control T. absoluta including pest detection, population monitoring, mass annihilation and mating disruption techniques. [less ▲]

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