Environmental impacts of genetically modified crops are mandatorily assessed during their premarket phase. One of the areas of concern is the possible impact on nontarget organisms. Crops expressing Cry toxins might affect Lepidoptera larvae living outside cultivated fields, through pollen deposition on wild plants, which constitute their food source. While pollen toxicity varies among different events, possible exposure of nontarget species depends on the agro-environmental conditions. This study was conducted in two protected areas in Italy, characterized by different climatic conditions, where many Lepidoptera species thrive in proximity to maize cultivations. To estimate the possible exposure in absence of the actual stressor (e.g., Cry1-expressing maize plants), we conducted a two-year field survey of butterflies and weeds. Indicator species were selected—Aglais (Inachis) io in the Northern site and Vanessa cardui in the Southern site—and their phenology was investigated. Pollen dispersal from maize fields was measured by collection in Petri dishes. Duration and frequency of exposure was defined by the overlap between pollen emission and presence of larvae on host plants. Different risk scenarios are expected in the two regions: highest exposure is foreseen for A. io in the Northern site, while minimal exposure is estimated for V. cardui in the Southern site. In the latter case, locally grown maize cultivars flower in mid-summer in coincidence with an aestivation period for several butterfly species due to hot and dry conditions. Moreover, host plants of V. cardui are at the end of their life cycle thus limiting food availability.

Evaluation of the potential exposure of butterflies to genetically modified maize pollen in protected areas in Italy / Salvatore Arpaia , Ferdinando Baldacchino, Sara Bosi, Giovanni Burgio, Simona Errico, Rosaria Alessandra Magarelli, Antonio Masetti, Salvatore Santorsola. - In: INSECT SCIENCE. - ISSN 1672-9609. - ELETTRONICO. - 25:(2018), pp. 549-561. [10.1111/1744-7917.12591]

Evaluation of the potential exposure of butterflies to genetically modified maize pollen in protected areas in Italy

Sara Bosi;Giovanni Burgio;D'ERRICO, SIMONA;Antonio Masetti;
2018

Abstract

Environmental impacts of genetically modified crops are mandatorily assessed during their premarket phase. One of the areas of concern is the possible impact on nontarget organisms. Crops expressing Cry toxins might affect Lepidoptera larvae living outside cultivated fields, through pollen deposition on wild plants, which constitute their food source. While pollen toxicity varies among different events, possible exposure of nontarget species depends on the agro-environmental conditions. This study was conducted in two protected areas in Italy, characterized by different climatic conditions, where many Lepidoptera species thrive in proximity to maize cultivations. To estimate the possible exposure in absence of the actual stressor (e.g., Cry1-expressing maize plants), we conducted a two-year field survey of butterflies and weeds. Indicator species were selected—Aglais (Inachis) io in the Northern site and Vanessa cardui in the Southern site—and their phenology was investigated. Pollen dispersal from maize fields was measured by collection in Petri dishes. Duration and frequency of exposure was defined by the overlap between pollen emission and presence of larvae on host plants. Different risk scenarios are expected in the two regions: highest exposure is foreseen for A. io in the Northern site, while minimal exposure is estimated for V. cardui in the Southern site. In the latter case, locally grown maize cultivars flower in mid-summer in coincidence with an aestivation period for several butterfly species due to hot and dry conditions. Moreover, host plants of V. cardui are at the end of their life cycle thus limiting food availability.
2018
Evaluation of the potential exposure of butterflies to genetically modified maize pollen in protected areas in Italy / Salvatore Arpaia , Ferdinando Baldacchino, Sara Bosi, Giovanni Burgio, Simona Errico, Rosaria Alessandra Magarelli, Antonio Masetti, Salvatore Santorsola. - In: INSECT SCIENCE. - ISSN 1672-9609. - ELETTRONICO. - 25:(2018), pp. 549-561. [10.1111/1744-7917.12591]
Salvatore Arpaia , Ferdinando Baldacchino, Sara Bosi, Giovanni Burgio, Simona Errico, Rosaria Alessandra Magarelli, Antonio Masetti, Salvatore Santorsola
File in questo prodotto:
File Dimensione Formato  
Insect Science 25-2018.pdf

accesso riservato

Tipo: Versione (PDF) editoriale
Licenza: Licenza per accesso riservato
Dimensione 929.27 kB
Formato Adobe PDF
929.27 kB Adobe PDF   Visualizza/Apri   Contatta l'autore
POSTPRINT 681781.pdf

accesso aperto

Tipo: Postprint
Licenza: Licenza per accesso libero gratuito
Dimensione 2.21 MB
Formato Adobe PDF
2.21 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/11585/681781
Citazioni
  • ???jsp.display-item.citation.pmc??? 2
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 11
social impact