Surveys of the presence of Hyalesthes obsoletus Signoret (Rhynchota: Cixiidae) and other hoppers in Lombardy (Northern Italy)

Emanuele Mazzoni, Rinaldo Nicoli Aldini, Ferdinando Pavesi, Piero Cravedi, 32379, ALIMENTARI E AMBIENTALI FACOLTA' DI SCIENZE AGRARIE, - Dipartimento di Scienze delle produzioni vegetali sostenibili (DI.PRO.VE.S.) PIACENZA

Risultato della ricerca: Contributo in libroContributo a convegno

Abstract

A monitoring programme was carried out in Lombardy from 2000 to study the presence and biology of the leafhoppers involved in phytoplasma transmission to grape. From 2003 also biomolecular analyses were performed to assess the frequency of “positive” insects using PCR. Special attention was given to Hyalesthes obsoletus Signoret (Rhynchota: Cixiidae), a leafhopper whose presence in vineyards is worrying because it is well known from literature that this insect can transmit to the grape the “bois noir”, a phytoplasma disease whose symptoms are very similar to those produced by the “golden flavescence”. During the surveys this species was only occasionally collected directly from grape, but it was quite abundant on weeds, mainly Urtica sp. and in a lesser extent, Convolvulus arvensis and Calystegia sp.. The percentage of “positive” specimens was quite different in the various localities but on the average the percentage of positive ones was rather low. According to these results, H. obsoletus does not seem to play a major role in transmitting the “bois noir” in Lombardy, as the insect can be found only occasionally on grape, and moreover because the percentage of “positive” specimens, at least in some areas, is very low.
Lingua originaleEnglish
Titolo della pubblicazione ospiteProceedings of the Meeting of the IOBC/wprs Working Group “Integrated Protection in Viticulture”
Pagine183-186
Numero di pagine4
Stato di pubblicazionePubblicato - 2006
EventoMeeting of the IOBC/wprs Working Group “Integrated Protection in Viticulture” - Boario Terme (BS) 20-22/10/2005 - Boario Terme (BS)
Durata: 20 ott 200522 ott 2005

Convegno

ConvegnoMeeting of the IOBC/wprs Working Group “Integrated Protection in Viticulture” - Boario Terme (BS) 20-22/10/2005
CittàBoario Terme (BS)
Periodo20/10/0522/10/05

Keywords

  • fitoplasmi
  • legno nero
  • vite

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