Influenza delle infrastrutture ecologiche poste ai margini del vigneto su Empoasca vitis (Goethe) (Homoptera: Cicadellidae) e il suo parassitoide Anagrus atomus L. (Hymenoptera: Mymaridae)

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Influence of ecological infrastructures at the edge of the vineyard on Empoasca vitis (Goethe) (Homoptera: Cicadellidae) and its parasitoid Anagrus atomus L. (Hymenoptera: Mymaridae) It is widely accepted that plant diversity in agrosystems helps to maintaining entomophagous insects useful for a natural control of pests. In this context, the present paper concerns a study on populations of the green grape leafhopper Empoasca vitis Goethe (Homoptera: Cicadellidae) and its parasitoid Anagrus atomus (L.) (Hymenoptera, Mymaridae)in an organic vineyard located in Salemi (446 m a.s.l.), (TP) Sicily, in biological management from March to October 2012, considering two plots, one with hedges of Rubus ulmifolius Schott, R. canescens D.C., Rosa canina L. and Rosmarinus officinalis L. and the other in the absence of hedges. We evaluated the influence of plant species and the variation of the distance of the hedges from the vineyard (10, 50 and 100 m) on flights of E. vitis and its antagonist both inside vineyards and in surrounding hedges, using yellow sticky traps, and on the distribution of young stages of the pest by samples of leaves. The results showed a positive influence of hedgerows on the control of E. vitis and this depends on the distance of the hedges from the vineyard. In addition, differences in population levels were detected between plant species, with major presence of bramble. Also, we noted the population of the pest has always been below the economic threshold, probably both the climate of the period unfavorable to leafhopper both for the presence of hedges, implanted for several years, which has conducted an ecological equilibrium in the vineyard
Lingua originaleItalian
pagine (da-a)26-34
Numero di pagine9
Stato di pubblicazionePublished - 2014

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