INUNDATIVE RELEASES OF THE NATIVE PARASITOID ANASTATUS BIFASCIATUS FOR THE CONTROL OF HALYOMORPHA HALYS IN ITALY The brown marmorated stinkbug Halyomorpha halys (Heteroptera: Pentatomidae) is an invasive polyphagous insect that is difficult to manage, and very harmful especially to fruit crops. The aim of this work was to evaluate the effectiveness of inundative releases with the autochthonous parasitoid Anastatus bifasciatus for the biological control of H. halys. Between June and July 2019, weekly releases with density of 1 female/m2 were carried out in two areas (one near Modena, the other near Ravenna) on the arboreal-shrub vegetation adjacent to integrated management orchards. Parasitization was assessed in the release and control areas by exposing both fresh and frozen sentinel egg masses. The average parasitization did not exceed 9.4% in the release area; no significant differences were detected with the control areas. Among the various types of sentinel egg masses, the parasitization was higher on fresh naturally laid ones. Critical issues arose in verifying the effects of the release of generalist parasitoids.
La cimice marmorata asiatica Halyomorpha halys (Heteroptera: Pentatomidae) è un insetto polifago invasivo di difficile gestione, assai dannoso soprattutto alle colture frutticole. Scopo del lavoro era la valutazione dell’efficacia di rilasci inondativi con il parassitoide autoctono Anastatus bifasciatus per il controllo biologico di H. halys. Tra giugno e luglio 2019 sono stati effettuati rilasci settimanali con densità di 1 femmina/m2 in due aree (una presso Modena, l’altra presso Ravenna) a vegetazione arborea-arbustiva adiacenti a frutteti a gestione integrata. Si è valutata la parassitizzazione nell’area di rilascio e in aree di controllo esponendo ovature sentinella sia fresche che surgelate. La parassitizzazione media non superava il 9,4% nell’area di rilascio e non si sono riscontrate differenze significative con le aree di controllo. Tra le varie tipologie di ovature sentinella, la maggiore parassitizzazione era su quelle fresche naturalmente deposte. Sono emerse criticità nella verifica degli effetti del rilascio di parassitoidi generalisti. Parole chiave: cimice asiatica, lotta biologica, parassitoidi generalisti, ovature sentinella
Rilasci inondativi del parassitoide autoctono Anastatus bifasciatus per il controllo di Halyomorpha halys in Italia / Maistrello, L.; Costi, E.; Di Bella, E.; Vaccari, G.; Caruso, S.; Casoli, L.; Preti, M.; Landi, M.; Bombardini, E.; Moretti, C.; Tommasini, M. G.; Bariselli, M.; Butturini, A.; Haye, T.. - 1:(2020), pp. 167-176. (Intervento presentato al convegno Giornate Fitopatologiche 2020 tenutosi a Webinar nel 3/11/2020).
Rilasci inondativi del parassitoide autoctono Anastatus bifasciatus per il controllo di Halyomorpha halys in Italia
Maistrello L.;Costi E.;Di Bella E.;
2020
Abstract
INUNDATIVE RELEASES OF THE NATIVE PARASITOID ANASTATUS BIFASCIATUS FOR THE CONTROL OF HALYOMORPHA HALYS IN ITALY The brown marmorated stinkbug Halyomorpha halys (Heteroptera: Pentatomidae) is an invasive polyphagous insect that is difficult to manage, and very harmful especially to fruit crops. The aim of this work was to evaluate the effectiveness of inundative releases with the autochthonous parasitoid Anastatus bifasciatus for the biological control of H. halys. Between June and July 2019, weekly releases with density of 1 female/m2 were carried out in two areas (one near Modena, the other near Ravenna) on the arboreal-shrub vegetation adjacent to integrated management orchards. Parasitization was assessed in the release and control areas by exposing both fresh and frozen sentinel egg masses. The average parasitization did not exceed 9.4% in the release area; no significant differences were detected with the control areas. Among the various types of sentinel egg masses, the parasitization was higher on fresh naturally laid ones. Critical issues arose in verifying the effects of the release of generalist parasitoids.
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