Frequency distribution of Malacosoma neustrium (L.) egg masses and nests in cork oak forests (Articolo in rivista)

Type
Label
  • Frequency distribution of Malacosoma neustrium (L.) egg masses and nests in cork oak forests (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Alternative label
  • Verdinelli M., Luciano P. & Serra G. (2002)
    Frequency distribution of Malacosoma neustrium (L.) egg masses and nests in cork oak forests
    in IOBC-WPRS Bulletin
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Verdinelli M., Luciano P. & Serra G. (literal)
Pagina inizio
  • 151 (literal)
Pagina fine
  • 154 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 25 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Marcello Verdinelli: Istituto per lo Studio degli Ecosistemi, CNR, sezione Ecologia Applicata e Controllo Biologico, Sassari, Italy Pietro Luciano: Dipartimento di Protezione delle Piante, sezione di Entomologia agraria, Sassari, Italy Giuseppe Serra: Dipartimento di Protezione delle Piante, sezione di Entomologia agraria, Sassari, Italy (literal)
Titolo
  • Frequency distribution of Malacosoma neustrium (L.) egg masses and nests in cork oak forests (literal)
Abstract
  • In order to define a reliable sampling method to defoliating moth, data on population density of Malacosoma neustrium (L.) were collected. Wild M. neustrium populations were monitored at seven field sites in the major cork oak forests of Sardinia, in the spring of 1998 and 1999. Egg mass and nest location on plants was analysed. An insect preference in laying the egg masses from the East to the South facing side of the trees was recorded. Nest distribution on the trees followed the same trend. The spatial distribution among plants was analysed fitting Poisson’s, Neyman’s and negative binomial mathematical models to actual distributions. In all localities nests were distributed contagiously among plants while the egg masses location showed a different pattern. Taylor’s power law regression was used to determine sample size requirements necessary for estimating population means with two fixed levels of precision (D = 0.10; D = 0.25). At low egg masses density condition a high number of trees should be observed ( ; ; ). Using Taylor’s power law parameters at a precision level and with a population density of 1 egg mass per tree, it is necessary to examine 36 plants. The results obtained encourage us to suppose that the observation of a limited part of the tree offers reliable data to estimate the pest population density. (literal)
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