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Robert F Luck - One of the best experts on this subject based on the ideXlab platform.

  • precise sex ratios manifested by several encyrtid parasitoids hymenoptera encyrtidae of brown soft scale coccus hesperidum l hemiptera coccidae
    Behavioral Ecology and Sociobiology, 2008
    Co-Authors: Apostolos Kapranas, Joseph G Morse, P Pacheco, L D Forster, Robert F Luck
    Abstract:

    We examined whether several facultatively gregarious encyrtid (Hymenoptera: Encyrtidae) endoparasitoids of brown soft scale, Coccus hesperidum L., manifest precise sex allocation under field conditions. Metaphycus luteolus (Timberlake), Metaphycus angustifrons (Compere), Metaphycus stanleyi (Compere), and Microterys nietneri (Motshulsky) evince brood sex ratios that are female-biased and extremely precise (low variance in the number of sons per host). Typically, this sex allocation pattern is attributed to extreme local mate competition (LMC) in which only one foundress exploits a patch of hosts and mating occurs mostly between her offspring. However, such a pattern of sex allocation was not detected for Metaphycus helvolus (Compere). Also, a large proportion of the broods in all five species contained only daughters; thus, an excess of male-only broods was expected if unmated females (i.e., females that can produce only sons) contribute offspring before mating. All-male broods were rare in our samples. This finding coupled with the life history characteristics of these wasps, such as the exploitation of aggregated hosts and the long life span and mobility of males, suggest that nonlocal mating is frequent. Our empirical work suggests that it is advantageous to allocate precise sex ratios in cases in which mating opportunities for males are not restricted to their natal host and/or when multiple foundresses exploit large patches of hosts. Limited theoretical work also supports this prediction but more detailed studies of this taxon’s mating structure and other life history characteristics are necessary to understand their sex allocation decisions.

Nemmat A. Hussein - One of the best experts on this subject based on the ideXlab platform.

Apostolos Kapranas - One of the best experts on this subject based on the ideXlab platform.

  • precise sex ratios manifested by several encyrtid parasitoids hymenoptera encyrtidae of brown soft scale coccus hesperidum l hemiptera coccidae
    Behavioral Ecology and Sociobiology, 2008
    Co-Authors: Apostolos Kapranas, Joseph G Morse, P Pacheco, L D Forster, Robert F Luck
    Abstract:

    We examined whether several facultatively gregarious encyrtid (Hymenoptera: Encyrtidae) endoparasitoids of brown soft scale, Coccus hesperidum L., manifest precise sex allocation under field conditions. Metaphycus luteolus (Timberlake), Metaphycus angustifrons (Compere), Metaphycus stanleyi (Compere), and Microterys nietneri (Motshulsky) evince brood sex ratios that are female-biased and extremely precise (low variance in the number of sons per host). Typically, this sex allocation pattern is attributed to extreme local mate competition (LMC) in which only one foundress exploits a patch of hosts and mating occurs mostly between her offspring. However, such a pattern of sex allocation was not detected for Metaphycus helvolus (Compere). Also, a large proportion of the broods in all five species contained only daughters; thus, an excess of male-only broods was expected if unmated females (i.e., females that can produce only sons) contribute offspring before mating. All-male broods were rare in our samples. This finding coupled with the life history characteristics of these wasps, such as the exploitation of aggregated hosts and the long life span and mobility of males, suggest that nonlocal mating is frequent. Our empirical work suggests that it is advantageous to allocate precise sex ratios in cases in which mating opportunities for males are not restricted to their natal host and/or when multiple foundresses exploit large patches of hosts. Limited theoretical work also supports this prediction but more detailed studies of this taxon’s mating structure and other life history characteristics are necessary to understand their sex allocation decisions.

Vladimir A Trjapitzin - One of the best experts on this subject based on the ideXlab platform.

  • Microterys niet1veri motschulsky 1859 parasitoide eficiente de coccidae especialmente en citricos
    Libros UAT, 2018
    Co-Authors: Vladimir A Trjapitzin, Enrique Ruizcancino, Juana Maria Coronadoblanco
    Abstract:

    This book represents a monographic review of Microterys nietneri (Motschulsky, 1859) (Hymenoptera: Chalcidoidea: Encyrtidae), an important parasitoid of the soft brown scale Coccus hesperidum Linnaeus (Homoptera: Coccoidea: Coccidae) on citrus and some other cultivated plants. The species was described from the mountains of Sri Lanka. Its home region is postulated to be South-East Asia. M. nietneri penetrated by ecesis (with its hosts) to many subtropical and some tropical regions of the world including Mexico, and has been purposely introduced into Australia and New Zealand. The book is based on large materials from different museums of the world and on own materials and observations, contains general information on M. nietneri as well as data on its geographic distribution and probable ways of ecesis, specialization of parasitism, supposed caces, pre-imaginal stages, and on particularities of the biology and practical use of this benefical insect in various regions and countries, including its application in greenhouses and in integrated pest management. The cited literature includes 170 sources.

  • Microterys nietneri motschulsky 1859 parasitoide eficiente de coccidae especialmente en citricos
    Editorial UAT, 2014
    Co-Authors: Vladimir A Trjapitzin, Enrique Ruiz Cancino, Juana Maria Coronado Blanco
    Abstract:

    This book is a monographic revision of Microterys nietneri (Motschulsky, 1859) (Hymenoptera: Chalcidoidea: Encyrtidae), an important parasitoid of the brown soft scale Coccus hesperidum Linnaeus (Homoptera: Coccoidea: Coccidae) on citrus and some other crops. The species was described from the mountains of Sri Lanka. We hypothesize that their country may be southwest Asia. M nietneri penetrated by ecesis (with their hosts) to many tropical and subtropical regions of the world some, to Mexico, and was intentionally introduced to Australia and New Zealand. The book is based on extensive material from museums around the world and in the materials and observations, contains general information concerning M nietneri and data distribution geographical, likely pathways ecesis, specialty parasitism alleged races, immature stages, peculiarities of their biology and the practical use of this beneficial insect in various regions and countries, including its application in greenhouses and integrated pest management. The literature includes 170 citations.

  • Microterys Nietneri (Motschulsky, 1859), Parasitoide Eficiente De Coccidae, Especialmente En Cítricos: Serie Avispas Parasíticas De Plagas Y Otros Insectos
    Planea, 2008
    Co-Authors: Vladimir A Trjapitzin, Enrique Ruiz_cancino, Juana Maria Coronado Blanco
    Abstract:

    \ua0Este libro representa una revisión monográfica de Microterys nietneri (Motschulsky, 1859) (Hymenoptera: Chalcidoidea: Encyrtidae), un parasitoide importante de la escama suave café Coccus hesperidum Linnaeus (Homoptera: Coccoidea: Coccidae) sobre cítricos y algunas otras plantas cultivadas. La especie fué descrita de las montañas de Sri Lanka. Se postula que su patria puede ser el suroeste asiático

Juana Maria Coronado Blanco - One of the best experts on this subject based on the ideXlab platform.

  • Microterys nietneri motschulsky 1859 parasitoide eficiente de coccidae especialmente en citricos
    Editorial UAT, 2014
    Co-Authors: Vladimir A Trjapitzin, Enrique Ruiz Cancino, Juana Maria Coronado Blanco
    Abstract:

    This book is a monographic revision of Microterys nietneri (Motschulsky, 1859) (Hymenoptera: Chalcidoidea: Encyrtidae), an important parasitoid of the brown soft scale Coccus hesperidum Linnaeus (Homoptera: Coccoidea: Coccidae) on citrus and some other crops. The species was described from the mountains of Sri Lanka. We hypothesize that their country may be southwest Asia. M nietneri penetrated by ecesis (with their hosts) to many tropical and subtropical regions of the world some, to Mexico, and was intentionally introduced to Australia and New Zealand. The book is based on extensive material from museums around the world and in the materials and observations, contains general information concerning M nietneri and data distribution geographical, likely pathways ecesis, specialty parasitism alleged races, immature stages, peculiarities of their biology and the practical use of this beneficial insect in various regions and countries, including its application in greenhouses and integrated pest management. The literature includes 170 citations.

  • Microterys Nietneri (Motschulsky, 1859), Parasitoide Eficiente De Coccidae, Especialmente En Cítricos: Serie Avispas Parasíticas De Plagas Y Otros Insectos
    Planea, 2008
    Co-Authors: Vladimir A Trjapitzin, Enrique Ruiz_cancino, Juana Maria Coronado Blanco
    Abstract:

    \ua0Este libro representa una revisión monográfica de Microterys nietneri (Motschulsky, 1859) (Hymenoptera: Chalcidoidea: Encyrtidae), un parasitoide importante de la escama suave café Coccus hesperidum Linnaeus (Homoptera: Coccoidea: Coccidae) sobre cítricos y algunas otras plantas cultivadas. La especie fué descrita de las montañas de Sri Lanka. Se postula que su patria puede ser el suroeste asiático