78 research outputs found

    Remarques sur le G. Africonidia McKenzie (Coccoidea-Diaspidinae) avec description d'une espece nouvelle du Cameroun Meridional

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    1 láminaLe g. Africonidia Mc. Kenzie (type : halli Mc. Kenzie) créé -en 1947 pour une espèce originaire de Durban (Afrique du Sud) vivant sur Trichilia sp., est voisin du g. Aonidiella Ben. et Leon., qui comprend de nombreuses espèces africaines. La différence entre ces genres est peu accusée, mais le g. Africonidia Mc. Kenzie, tout en possédent un prosoma dilaté (comme Aonidiella) accuse une ornementation pygidiale se rapprochant davantage du g. Quadraspicliotus Mc. Gil. et Diaspidiotus Leon. tel que le statut en a été définitivement établi.Peer reviewe

    A Survey of Scale Insects (Sternorryncha: Coccoidea) Occurring on Table Grapes in South Africa

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    Increasing international trade and tourism have led to an increase in the introduction of exotic pests that pose a considerable economic threat to the agro-ecosystems of importing countries. Scale insects (Sternorryncha: Coccoidea) may be contaminants of export consignments from the South African deciduous fruit industry to the European Union, Israel, United Kingdom and the United States, for example. Infestations of immature scale insects found on South African fruit destined for export have resulted in increasing rates of rejection of such consignments. To identify the risk posed by scale insect species listed as phytosanitary pests on table grapes to the abovementioned importing countries, a field survey was undertaken in 2004–2005 in vineyards throughout all grape-producing regions in South Africa. Coccoidea species found during the current field survey were Planococcus ficus (Signoret), Pseudococcus longispinus (Targioni Tozzetti), Coccus hesperidum L. and Nipaecoccus viridis (Newstead). With the exception of Pl. ficus, which has only been collected from Vitis vinifera (Vitaceae) and Ficus carica (Moraceae) in South Africa, these species are polyphagous and have a wide host range. None of the scale insect species found to occur in vineyards in South Africa pose a phytosanitary risk to countries where fruit are exported except for Ferrisia malvastra (McDaniel) and N. viridis that have not been recorded in the USA. All scale insects previously found in vineyards in South Africa are listed and their phytosanitary status discussed. The results of the survey show that the risk of exporting scale insect pests of phytosanitary importance on table grapes from South Africa is limited

    Sur deux Diaspidinae nouveaux du Tha\uefland (Coccoidea)

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    Volume: 100Start Page: 29End Page: 3

    “La lutte contre les insectes”

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    La Commission internationale de lutte biologique contre les ennemis des cultures (C.I.L.B.)

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    Further Trials with Parathion Dusts against Eurygaster integriceps

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    Entomologie. — Un genre nouveau de Diaspidini-Chionaspidina (Coccoidea) de la for\ueat \ue9quatoriale centrafricaine

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    Volume: 5Start Page: 37End Page: 4

    Entomologie. — Sur un Saissetia Depl., (Coccoidea-Lecanin\ue6) nouveau de la for\ueat centrafricaine

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    Volume: 3Start Page: 134End Page: 13
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