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Local augmentation efficiency of Anaphes nitens (Hymenoptera, Mymaridae), the egg parasitoid of Gonipterus platensis (Coleoptera, Curculionidae)
Author(s) -
SantolamazzaCarbone Serena,
PérezRodríguez Antonio,
GarcíaFojo Rubén,
CorderoRivera Adolfo
Publication year - 2019
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/jen.12626
Subject(s) - biology , parasitoid , eucalyptus nitens , curculionidae , parasitism , pest analysis , eucalyptus globulus , biological dispersal , hymenoptera , biological pest control , population , population density , host (biology) , eucalyptus , ecology , botany , demography , sociology
The efficiency of local augmentation releases of the egg parasitoid Anaphes nitens to control the Eucalyptus snout‐beetle Gonipterus platensis was tested in Eucalyptus globulus plantations in Galicia (NW Spain). On May–June 2006, at two localities of Pontevedra province, the release of host egg capsules parasitized by A. nitens at a potential rate of 300 adults/ha was compared with a release density of 900 adults/ha, and a control group of eucalypts not subjected to augmentation. Parasitism rate after 1–2 weeks did not significantly increase over the control plots at both localities. The high release rate did not ensure a higher crop protection and therefore could be not economically justified. On March–April 2017, at four localities of Pontevedra province, the test was replicated by releasing 300 parasitoids/ha. Parasitism level did significantly increase over the control just in one locality. Augmentation of A. nitens at small scale generally failed to achieve a higher protection from the pest, possibly due to the large extension of the E. globulus plantations, the magnitude of the G. platensis population and the fluctuations of the established parasitoid population, whose density is in turn affected by host egg availability and density‐dependent dispersal.