The present thesis aims to investigate the effects that treatments, devoted to the control of Scaphoideus titanus Ball, can have on the populations of other arthropods occurring in vineyards. For this purpose, observations were conducted in the 2024 growing season in a Glera cultivar vineyard located in the province of Treviso. The populations of S. titanus, of other phytophagous insects (for example leafhoppers, scales, thrips and mites) and some predators (for example phytoseiids) were sampled. Regarding S. titanus, the aim of the investigation was to evaluate the effectiveness of one or two insecticide treatments applied with recovery or tower fan systems. Two active substances were used: tau-fluvalinate and etofenprox. Tau-fluvalinate proved to be effective in containing the juveniles of S. titanus. Furthermore, a single insecticide application proved to be sufficiently effective. As regards the sprayers, no differences emerged in the control of S. titanus. The recovery fan sprayer showed greater efficacy in the control of E. vitis and Z. rhamni, while no significant differences emerged regarding the active ingredient used. The side effects on other insect pests were not significant, while for phytoseiid mites, etofenprox showed a negative effect on Phytoseius finitimus. The data collected confirmed some hypotheses and underline the importance of rigorously controlling the experimental factors.
La presente tesi ha lo scopo di approfondire gli effetti che i trattamenti, destinati al controllo di Scaphoideus titanus Ball, possono avere sulle popolazioni di altri artropodi presenti in vigneto. A tale scopo, sono state condotte osservazioni nella stagione vegetativa 2024 in un vigneto di cultivar Glera situato in provincia di Treviso. Sono state censite le popolazioni di S. titanus, di altri fitofagi (ad es. cicaline, cocciniglie, tripidi e acari) e di alcuni predatori (ad es. Fitoseidi). Per quanto riguarda S. titanus, lo scopo dell’indagine era valutare l’efficacia di uno o due trattamenti insetticidi applicati con irroratrici a torretta o a tunnel con recupero. Sono state utilizzate due sostanze attive: tau-fluvalinate ed etofenprox. Tau-fluvalinate si è rivelato efficace nel contenere le forme giovanili di S. titanus, in particolare sulle foglie. Riguardo la strategia, si è dimostrato sufficiente un solo intervento insetticida. Per quanto riguarda le irroratrici, non sono emerse differenze nel controllo di S. titanus. Riguardo E. vitis e Z. rhamni, l'irroratrice a tunnel con recupero ha dimostrato una maggiore efficacia, mentre non sono emerse differenze significative per le sostanze attive impiegate. Gli effetti collaterali sugli altri fitofagi sono stati poco significativi, ad eccezione di quelli su Phytoseius finitimus in seguito al trattamento con etofenprox. I dati raccolti confermano alcune ipotesi e sottolineano l'importanza di controllare rigorosamente i fattori sperimentali.
Difesa fitosanitaria del vigneto nel contesto della lotta alla Flavescenza dorata
DALLA TORRE, GIOVANNA
2024/2025
Abstract
The present thesis aims to investigate the effects that treatments, devoted to the control of Scaphoideus titanus Ball, can have on the populations of other arthropods occurring in vineyards. For this purpose, observations were conducted in the 2024 growing season in a Glera cultivar vineyard located in the province of Treviso. The populations of S. titanus, of other phytophagous insects (for example leafhoppers, scales, thrips and mites) and some predators (for example phytoseiids) were sampled. Regarding S. titanus, the aim of the investigation was to evaluate the effectiveness of one or two insecticide treatments applied with recovery or tower fan systems. Two active substances were used: tau-fluvalinate and etofenprox. Tau-fluvalinate proved to be effective in containing the juveniles of S. titanus. Furthermore, a single insecticide application proved to be sufficiently effective. As regards the sprayers, no differences emerged in the control of S. titanus. The recovery fan sprayer showed greater efficacy in the control of E. vitis and Z. rhamni, while no significant differences emerged regarding the active ingredient used. The side effects on other insect pests were not significant, while for phytoseiid mites, etofenprox showed a negative effect on Phytoseius finitimus. The data collected confirmed some hypotheses and underline the importance of rigorously controlling the experimental factors.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/88492