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Reinhard Berndt – One of the best experts on this subject based on the ideXlab platform.

  • Additions to the southern African rust fungi: four new species and two new host genera from South Africa and Angola
    Mycological Progress, 2020
    Co-Authors: Reinhard Berndt

    Abstract:

    This paper describes four new species of rust fungi from southern Africa. Three of them, Puccinia dimorphothecae-cuneatae on Dimorphotheca cuneata (Asteraceae), P. feliciicola on Felicia filifolia (Asteraceae), and Uredo myricae on Myrica sp. (Myricaceae), were collected in the South African Cape region, while Uromyces hessii on Zantedeschia angustiloba (Araceae) is from Angola. Rust fungi are reported for the first time on the plant genera Thereianthus (Iridaceae) and Cullumia (Asteraceae), both from South Africa. The specimen on Thereianthus was provisionally determined as Uromyces ecklonii that has been known so far only on Freesia . The rust of Cullumia showed only uredinia that were similar to Puccinia clanwilliamensis , hitherto only known on Berkheya .

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Hance Thierry – One of the best experts on this subject based on the ideXlab platform.

  • An analysis of potential resistance of the phytophagous mite, Tetranychus urticae Koch (Acari: Tetranychidae) to four botanical pesticides
    Presses Agronomiques de Gembloux, 2015
    Co-Authors: Attia Sabrine, Kl Lebdi, Heuskin Stéphanie, Lognay Georges, Hance Thierry

    Abstract:

    peer reviewedaudience: researcher, professional, studentDescription of the subject. Synthetic acaricides have been widely used to manage Tetranychus urticae. Due to the excessive use of biocide and the associated problems of pesticide resistance and environmental pollution, there is an increasing demand for sustainable, environmentally-friendly control methods. Among the current alternative strategies aimed at decreasing the pest populations, the pesticides based on plant extracts are currently one of the most promising methods. Essential oils with acaricidal properties have been categorized as green pesticides because they are biodegradable and predominantly non-toxic to vertebrates.
    Objectives. With an aim to reduce the use of synthetic pesticides, they represent a promising approach for eco-chemical control of mites.
    Method. The aim of the present work was to analyze the risk of resistance emergence of T. urticae to repeated treatments with four plant extracts: Deverra scoparia Coss. & Durieu (Araliales: Apiaceae), Hertia cheirifolia (L.) Kuntze (Asterales: Ateraceae), Santolina africana Jord. & Fourr. (Asterales: Asteraceae) essential oils and garlic distillate Allium sativum L. (Asparagales: Alliaceae) after 20 generations.
    Results. Repeated treatments with S. africana essential oil during 20 generations did not provoke an emergence of resistance while a low development of resistance was observed with H. cheirifolia, A. sativum and D. scoparia extracts.
    Conclusions. The efficacy of these extracts against the two spotted spider mite and their low development of resistance make them a promising use for pest management

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  • An analysis of potential resistance of the phytophagous mite, Tetranychus urticae Koch (Acari: Tetranychidae) to four botanical pesticides
    , 2015
    Co-Authors: Attia Sabrine, Kl Lebdi, Heuskin Stéphanie, Lognay Georges, Hance Thierry

    Abstract:

    Description of the subject. Synthetic acaricides have been widely used to manage Tetranychus urticae. Due to the excessive use of biocide and the associated problems of pesticide resistance and environmental pollution, there is an increasing demand for sustainable, environmentally-friendly control methods. Among the current alternative strategies aimed at decreasing the pest populations, the pesticides based on plant extracts are currently one of the most promising methods. Essential oils with acaricidal properties have been categorized as green pesticides because they are biodegradable and predominantly non-toxic to vertebrates.
    Objectives. With an aim to reduce the use of synthetic pesticides, they represent a promising approach for eco-chemical control of mites.
    Method. The aim of the present work was to analyze the risk of resistance emergence of T. urticae to repeated treatments with four plant extracts: Deverra scoparia Coss. & Durieu (Araliales: Apiaceae), Hertia cheirifolia (L.) Kuntze (Asterales: Ateraceae), Santolina africana Jord. & Fourr. (Asterales: Asteraceae) essential oils and garlic distillate Allium sativum L. (Asparagales: Alliaceae) after 20 generations.
    Results. Repeated treatments with S. africana essential oil during 20 generations did not provoke an emergence of resistance while a low development of resistance was observed with H. cheirifolia, A. sativum and D. scoparia extracts.
    Conclusions. The efficacy of these extracts against the two spotted spider mite and their low development of resistance make them a promising use for pest management.Peer reviewe

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Roger G. Shivas – One of the best experts on this subject based on the ideXlab platform.

  • The rusts on Goodeniaceae and Stylidiaceae
    Mycological Progress, 2014
    Co-Authors: Alistair R. Mctaggart, Andrew D. W. Geering, Roger G. Shivas

    Abstract:

    Systematic relationships between the rusts on Goodeniaceae and Stylidiaceae were examined using phylogenetic analyses with two loci (internal transcribed spacer, large subunit region) from ribosomal DNA. Fresh specimens and herbarium material of four rust species ( Puccinia dampierae, P. gilgiana , P. saccardoi and Uromyces scaevolae ) from the Goodeniaceae and one ( P. stylidii ) from the Stylidiaceae were examined. A further species ( P. lagenophorae ) that is reported from hosts in Goodeniaceae and Asteraceae was included in our analysis. Our phylogenetic analysis recovered the rusts on Goodeniaceae and Stylidiaceae in clades sister to P. lagenophorae on Asteraceae. This supported a taxonomy in which P. lagenophorae is restricted to Asteraceae. Descriptions or taxonomic notes are provided for all of the known rusts on Goodeniaceae and Stylidiaceae.

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