Aphelinus mali (Haldeman) is the most important biological control agent of woolly apple aphid (WAA) Eriosoma lanigerum (Hausmann), a serious pest of apples. The amount of products used in apple orchards could compromise the effectiveness of A. mali on its biological control. The rate of parasitism reaches high levels (80-90%) in late summer when part of the damage has already been caused. In Trentino region (Italy) the first peak of flight of A. mali is in the post-flowering period, although limited in size and is essential for an exponential flight increase and the consequent culmination of the parasitisation ratio in summer, generally at the end of July. It is essential to avoid pesticides toxic to A. mali after flowering but also other active substances that can reduce A. mali activity. For these reasons, we tested several plant protection products to evaluate potential compatibility in integrated and organic pest management programs. The direct (topical sprays in Potter’s Tower) and residual (leaf residue) effect of insecticides and fungicides on the adult stage of this parasitoid were investigated under laboratory conditions. The active ingredients used in trials were deltamethrin (as a chemical referent), azadirachtin, sulphur and Lime Sulphur. The products were tested at recommended field rates. A treatment with water was used as control in both experimental trials. The insects’ mortality rate on direct effect in Potter’s Tower was different only for the deltamethrin at different control timing. Deltamethrin caused the highest mortality also in residual effect than the other products. After 3 and 7 days from the treatment no product were caused mortality

Zanoni, S.; Tomasi, C.; Baldessari, M.; Chiesa, S.G. (2024). Susceptibility of aphid parasitoid Aphelinus mali (Haldeman) to different active ingredients commonly used in organic apple orchards in Trentino (North Italy). In: 16th Slovenian Conference on Plant Protection, Bohinjska Bistrica, Slovenija, March 5-6, 2024. Ljubljana: Plant Protection Society of Slovenia: 461-468. ISBN: 9789619656112. handle: https://hdl.handle.net/10449/84476

Susceptibility of aphid parasitoid Aphelinus mali (Haldeman) to different active ingredients commonly used in organic apple orchards in Trentino (North Italy)

Zanoni, S.
Primo
;
Tomasi, C.;Baldessari, M.;Chiesa, S. G.
Ultimo
2024-01-01

Abstract

Aphelinus mali (Haldeman) is the most important biological control agent of woolly apple aphid (WAA) Eriosoma lanigerum (Hausmann), a serious pest of apples. The amount of products used in apple orchards could compromise the effectiveness of A. mali on its biological control. The rate of parasitism reaches high levels (80-90%) in late summer when part of the damage has already been caused. In Trentino region (Italy) the first peak of flight of A. mali is in the post-flowering period, although limited in size and is essential for an exponential flight increase and the consequent culmination of the parasitisation ratio in summer, generally at the end of July. It is essential to avoid pesticides toxic to A. mali after flowering but also other active substances that can reduce A. mali activity. For these reasons, we tested several plant protection products to evaluate potential compatibility in integrated and organic pest management programs. The direct (topical sprays in Potter’s Tower) and residual (leaf residue) effect of insecticides and fungicides on the adult stage of this parasitoid were investigated under laboratory conditions. The active ingredients used in trials were deltamethrin (as a chemical referent), azadirachtin, sulphur and Lime Sulphur. The products were tested at recommended field rates. A treatment with water was used as control in both experimental trials. The insects’ mortality rate on direct effect in Potter’s Tower was different only for the deltamethrin at different control timing. Deltamethrin caused the highest mortality also in residual effect than the other products. After 3 and 7 days from the treatment no product were caused mortality
Aphelinus mali
Susceptibility
Organic apple orchards
Treatments
Beneficial insects
9789619656112
2024
Zanoni, S.; Tomasi, C.; Baldessari, M.; Chiesa, S.G. (2024). Susceptibility of aphid parasitoid Aphelinus mali (Haldeman) to different active ingredients commonly used in organic apple orchards in Trentino (North Italy). In: 16th Slovenian Conference on Plant Protection, Bohinjska Bistrica, Slovenija, March 5-6, 2024. Ljubljana: Plant Protection Society of Slovenia: 461-468. ISBN: 9789619656112. handle: https://hdl.handle.net/10449/84476
File in questo prodotto:
File Dimensione Formato  
Zanoni_Poster_Aphelinus_Slovenia.pdf

solo utenti autorizzati

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.49 MB
Formato Adobe PDF
2.49 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
2024_Zbornik_izvleckov_SPVR Zanoni 111.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 5.57 MB
Formato Adobe PDF
5.57 MB Adobe PDF Visualizza/Apri
2024 Zbornik Zanoni 461-468.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 5.06 MB
Formato Adobe PDF
5.06 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/84476
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact