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Neodryinus typhlocybae Ashmead as a biological control agent of Metcalfa pruinosa Say Results of plurennial releases carried out in Friuli-Venezia Giulia Neodryinus typhlocybae Ashmead antagonista di Metcalfa pruinosa Say Risultati di liberazioni pluriennali effettuate in Friuli-Venezia Giulia


Entomologica (Bari). 2001( ) July; 35: 27-38
Neodryinus typhlocybae Ashmead as a biological control agent of Metcalfa pruinosa Say Results of plurennial releases carried out in Friuli-Venezia Giulia Neodryinus typhlocybae Ashmead antagonista di Metcalfa pruinosa Say Risultati di liberazioni pluriennali effettuate in Friuli-Venezia Giulia
During the three-year period 1998-2000 the entomophagous wasp Neodryinus typhlocybae (Ashmead) (Hymenoptera Dryinidae) was released to control the planthopper Metcalfa pruinosa (Say) (Homoptera Flatidae). The releases were carried out in 88 sites of 42 localities in the Friuli-Venezia Giulia region (north-eastern Italy). Between the end of May and the beginning of June, 200 N. typhlocybae cocoons, containing pupae, were placed in each site (woods, hedgerows, parklands). The entomophagous wasp became established in 83 cases out of 88 (94%) as shown by the numerous cocoons, containing overwintering larvae, found on the leaf undersurface of various trees and bushes at the end of the year. A few years after the introduction, populations of N. typhlocybae could still be found around release sites, showing that this species can permanently colonise different environments. In the first year, cocoons of the wasp were usually found up to 20-30 m from the original point of release. In successive years they were observed even at a distance of several kilometres from the release point, indicating that the adults can cover relatively long distances. Neodryinus typhlocybae will very probably colonise all the areas in the region that are infested by M. pruinosa, resulting in a significant reduction in the quantity of insecticides needed to control this pest.

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Accession: 038442165



Related references

Neodryinus typhlocybae (Ashmead) antagonista di Metcalfa pruinosa (Say). Risultati di liberazioni pluriennali effettuate in Friuli-Venezia Giulia. Entomologica Bari2002): 27-38, 2002

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