2015
DOI: 10.1007/s10453-015-9406-2
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A follow-up study examining airborne Ambrosia pollen in the Milan area in 2014 in relation to the accidental introduction of the ragweed leaf beetle Ophraella communa

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Cited by 29 publications
(26 citation statements)
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“…We had expected low densities of pollen in Italy, where all sites are located on the Po Plain and are colonised by the Ophraella beetle. Although the Po Plain is one of the major areas infested with A. artemisiifolia in Europe (Essl et al 2015), pollen numbers have dramatically decreased in this area since the Ophraella beetle was detected in 2013 (Bonini et al 2015). Italy was among the countries with low pollen densities but its numbers were not significantly different from average.…”
Section: Discussionmentioning
confidence: 99%
“…We had expected low densities of pollen in Italy, where all sites are located on the Po Plain and are colonised by the Ophraella beetle. Although the Po Plain is one of the major areas infested with A. artemisiifolia in Europe (Essl et al 2015), pollen numbers have dramatically decreased in this area since the Ophraella beetle was detected in 2013 (Bonini et al 2015). Italy was among the countries with low pollen densities but its numbers were not significantly different from average.…”
Section: Discussionmentioning
confidence: 99%
“…The insect preferentially feeds on A. artemisiifolia, and severe defoliation can result in a reduction of flower and seed production, or can even kill the plant before flowering (Zhou et al 2014). During the summer 2013 and 2014, concentrations of airborne ragweed pollen were significantly lower near the center of the colonized Italian area than what would be expected based on meteorological data of the region (Bonini et al 2015). This strongly indicates a huge effect of the insect, and a direct benefit for human health.…”
Section: Methodsmentioning
confidence: 45%
“…In the first year of its detection, O. communa reached high enough densities to completely defoliate and prevent flowering and seed set of most ragweed plants in the Milan area. Bonini et al (2016) showed that airborne common ragweed pollen levels observed in the Milan area in 2013 and 2014 were approximately 80% lower than in years prior to the establishment of O. communa. The decrease in ambrosia pollen observed in the Milan area could not be explained by meteorology in these years, suggesting that the decrease is related to the presence of large numbers of O. communa (Bonini et al 2016).…”
Section: Ambrosia Artemisiifolia L (Common Ragweed) (Asteraceae)mentioning
confidence: 91%
“…Bonini et al (2016) showed that airborne common ragweed pollen levels observed in the Milan area in 2013 and 2014 were approximately 80% lower than in years prior to the establishment of O. communa. The decrease in ambrosia pollen observed in the Milan area could not be explained by meteorology in these years, suggesting that the decrease is related to the presence of large numbers of O. communa (Bonini et al 2016). Studies are also underway to assess the non-target risks posed by O. communa to sunflower and native plant species.…”
Section: Ambrosia Artemisiifolia L (Common Ragweed) (Asteraceae)mentioning
confidence: 91%