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Contributo alla conoscenza degli ortotteroidei della Val Canale (Friuli Venezia Giulia, Italia nord-orientale)
Full text linkGli Insetti Ortotteroidei della Val Canale finora accertati assommano a 54 specie (1 Blattodeo, 1 Mantodeo, 48 Ortotteri, 4 Dermatteri). Per lo più si tratta di specie ad ampia distribuzione in Eurasia; le specie ad areale illirico-alpino sono meno rappresentate rispetto alla zona delle Prealpi Giulie. Gli Ortotteri di maggior rilievo sono: Pseudopodisma fieberi
(Scudder, 1898), diffusa sui rilievi montuosi dall’Italia nord-orientale alla Romania; Stenobothrus stigmaticus stigmaticus
(Rambur, 1838), presente in Italia solo in Friuli; Chrysochraon dispar dispar (Germar, 1835), presente in Italia solo in Alto
Adige e in Friuli; Chorthippus montanus (Charpenier, 1825), tipico di zone umide; Chorthippus pullus (Philippi, 1830),
bioindicatore dei greti fluvial
Chorthippus (Glyptobothrus) pullus (Philippi, 1830) (Insecta Orthoptera): nuove segnalazioni in Friuli Venezia Giulia e Veneto e distribuzione nell’arco alpino italiano
Full text linkSi riportano nuovi dati relativi alla presenza di Chorthippus (Glyptobothrus) pullus (Philippi, 1830) in
Veneto e Friuli Venezia Giulia. Questa specie risulta essere ben diffusa lungo i corsi d’acqua della zona montana friulana,
mentre in Veneto finora è stata rinvenuta in poche località. Viene riassunta la distribuzione della specie in Italia anche sulla
base di dati bibliografici. La specie finora è stata trovata a quote comprese fra 160 m e 2000 m. La maggior parte delle località
note, circa una trentina, è situata in Friuli Venezia Giulia e Veneto orientale. Nella parte restante dell’arco alpino italiano sono
state individuate finora sei stazioni distribuite fra Alto Adige, Piemonte e Valle d’AostaNew findings of Chorthippus (Glyptobothrus) pullus (Philippi, 1830) in Friuli Venezia Giulia and Veneto regions
are given. This species is widespread along the watercourses in the mountain area of Friuli Venezia Giulia; otherwise it has been
found in few localities in the Veneto region. The distribution of this species in Italy is summarized on the basis of bibliographic
data too. The altitudinal range goes from 160 m to 2000 m. At present most of known localities are in mountain area of Friuli
and eastern Veneto (about thirthy). In the remaining part of Italian Alps are known six sites spread out in Alto Adige, Piemonte
and Valle d’Aost
Diffusione in Italia e in Europa di Obolodiplosis robiniae (Haldeman), dittero cecidomiide neartico dannoso a Robinia pseudoacacia
No full textThe effect of insecticides on the non-target predatory mite Kampimodromus aberrans: Laboratory studies
No full textThe side-effects of pesticides on predatory mites have been investigated at various levels and international teams (e.g., the IOBC/wprs Working Group "Pesticides and beneficial organisms") have selected a few species of predatory mites occurring in Central and Northern Europe as representative for such studies. Key biocontrol species occurring in Southern Europe have received much less attention. Kampimodromus aberrans is the most important predator of herbivorous mites in South-European vineyards treated with selective pesticides. The impact of pesticides on K. aberrans populations has been studied in field conditions whereas few toxicological tests have been conducted in the laboratory because of difficulties in rearing this species. A method for rearing K. aberrans in the laboratory has recently been set up allowing toxicological studies to be conducted. In this paper, a toxicological method to assess the effects of pesticides on K. aberrans is described and the effects of insecticides frequently used in European vineyards on two K. aberrans strains are reported. These strains were collected from vineyards treated with organophosphates. Insecticides characterized by different modes of action were selected for trials. Among these, etofenprox and spinosad were classified as harmful to predatory mites. Chlorpyrifos reduced predatory mite fecundity, and was classified as moderately harmful for both strains. The toxicity of thiamethoxam and flufenoxuron varied with the strain (low to moderate). Indoxacarb and methoxyfenozide appeared to be harmless or slightly harmful. Implications of this study for adopting IPM tactics with a reduced risk for K. aberrans are discussed. © 2013 Elsevier Ltd
Effects of grape downy mildew on interactions between fungicides and predatory mites on grapevines.
No full textOrthoptera species widespread in Friuli Venezia Giulia region but rare or absent in most of Italy
No full textA method to assess the effects of pesticides on the predatory mite Phytoseiulus persimilis (Acari Phytoseiidae) in the laboratory
No full textEffects of different routes of exposure on the predatory mite Phytoseiulus persimilis and its prey
No full textRelationships between plant pathogenic fungi and mites in vineyards: implications for IPM
No full textIn this paper we summarize the results of studies aimed at investigating the relationships between fungal diseases and mites occurring in European vineyards. Most of the data originated from observations carried out in commercial and experimental vineyards in north-eastern Italy. Grapevine downy mildew, Plasmopara viticola, and grape powdery mildew, Uncinula necator, are the most significant grape diseases in several viticultural areas in Europe and throughout the world. The spread of downy mildew in European vineyards may increase the abundance of some species of Phytoseiidae and Tydeidae. Amblyseius andersoni responded clearly to the spread of downy mildew symptoms, an effect also observed, but at lower magnitudes, for Typhlodromus pyri and Kampimodromus aberrans. The beneficial effect of downy mildew on the survival, development and reproduction of phytoseiids and tydeids has a clear impact on their population dynamics. Downy mildew effects varied among phytoseiids, being more relevant for A. andersoni than for T. pyri. These interactions may have implications for IPM because T. pyri is more effective than A. andersoni in controlling phytophagous mites in vineyards. The role of powdery mildew as a food source for A. andersoni and T. pyri was less pronounced than that of downy mildew. The capacity of generalist predatory mites to persist in perennial ecosystems contributes to the successful biological control of phytophagous mites. In vineyards, the persistence of generalist predators in the absence of prey may be improved by their feeding on various food sources. Pollen is probably the most important food source in spring and early summer, whereas mildews increase in importance in late summer. Predatory mite persistence is largely affected by pesticide use. The results of our studies showed that downy mildew availability mediates the effects of fungicides on predatory mites because it represents an alternative food for them. Moreover, downy mildew can enhance the recovery of predatory mite populations after pesticide applications
Esplosioni demografiche di Barbitistes vicetinus (Galvagni & Fontana, 1993) (Orthoptera, Tettigoniidae) in Veneto.
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