Eur. J. Entomol. 118: 135-141, 2021 | DOI: 10.14411/eje.2021.014

Effectiveness of inundative releases of Anthocoris nemoralis (Hemiptera: Anthocoridae) in controlling the olive psyllid Euphyllura olivina (Hemiptera: Psyllidae)Original article

Naceur GHARBI ORCID...
Institut de l'Olivier, Laboratory of Integrated Olive Production, Cité Mahrajène, BP 208, 1082 Tunis, Tunisia; e-mail: gharbi.naceur@yahoo.fr

This study investigated the effectiveness of field releases of nymphs of Anthocoris nemoralis (F.) (Hemiptera: Anthocoridae) in controlling the olive psyllid, Euphyllura olivina Costa (Hemiptera: Psyllidae). Field trials were conducted in two successive years (2014 and 2015) in two organic olive orchards located in the region of Sfax (Tunisia) using two treatments: low (release of 10 A. nemoralis nymphs/tree) and high (release of 40 A. nemoralis nymphs/tree) applied two times, the first on March 3 and second on March 17. In both olive orchards, the high treatment was the most effective in controlling the increase of E. olivina in the spring. The A. nemoralis population grew gradually and reached a single peak towards the end of April. In control and low treatment plots, despite the significant increase in predator populations, psylla abundance was not controlled. After the second release, however, in high treatment plots a reduction in psyllid density was recorded. An expected effect of the A. nemoralis releases was a reduced parasitic activity of Psyllaephagus euphyllurae (Masi) (Hymenoptera: Encyrtidae).

Keywords: Hemiptera, Anthocoridae, Anthocoris nemoralis, Psyllidae, Euphyllura olivina, olive psyllid, control, inundative releases, olive tree, Tunisia

Received: August 11, 2020; Revised: December 30, 2020; Accepted: December 30, 2020; Published online: April 30, 2021  Show citation

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GHARBI, N. (2021). Effectiveness of inundative releases of Anthocoris nemoralis (Hemiptera: Anthocoridae) in controlling the olive psyllid Euphyllura olivina (Hemiptera: Psyllidae). EJE, 118, Article 135-141. https://doi.org/10.14411/eje.2021.014
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