Sex-dispersal differences of four phloem-feeding vectors and their relationship to wild-plant abundance were analyzed over 2 71- in two vineyard agroecosystems. Adults of Euscelis lineolatus Bruil, Neoatiturus fiinestratus (Flerrich-SchafTer), Psananotettix atoms (Dahlbom), and Hyalesthes obsotetus Signoret were sampled by using yellow sticky traps at two heights (20 and 150 cm) above the ground in a regular g,eo-referenced grid. Wild vegetation was surveyed around each sampling point. The most abundant species collected was N. Jenestratus, followed by P. atienus, H. obsoietus, and E. lineolatrus. Low traps were more effective in capturing the females of N. fenestratus and P. alienus and the males of all of the species, except N. fimestratus at one site. Sex ratio was male-biased for N. jenestratus in both agroecosystems at both trap heights, and only in low traps for H. obsoletus and P. alien us at one site. Insect abundance, temporal population dynamics, and dispersal patterns showed considerable fluctuations according to vineyard agroecosystems and years. In the current study, all of the four phloem-feeding vectors were not found homogeneously in the vineyards, and they were aggregated in correspondence with their herbaceous wild-plant hosts. Insects tended to disperse from the borders toward the vineyard, or vice versa. Colonizing pattern was strongly affected by border vegetation, fallow fields, and vineyard ground-cover vegetation. Different plant communities were identified inside die ag,,roecosystems, and significant correlations among insect and plant-species abundances were recorded. Data highlight ate importance of understanding the dispersal patterns of vector species for the application of correct integrated pest-management strategies.

Sex-Dispersal Differences of Four Phloem-Feeding Vectors and Their Relationship to Wild-Plant Abundance in Vineyard Agroecosystems

BURGIO, GIOVANNI;
2013

Abstract

Sex-dispersal differences of four phloem-feeding vectors and their relationship to wild-plant abundance were analyzed over 2 71- in two vineyard agroecosystems. Adults of Euscelis lineolatus Bruil, Neoatiturus fiinestratus (Flerrich-SchafTer), Psananotettix atoms (Dahlbom), and Hyalesthes obsotetus Signoret were sampled by using yellow sticky traps at two heights (20 and 150 cm) above the ground in a regular g,eo-referenced grid. Wild vegetation was surveyed around each sampling point. The most abundant species collected was N. Jenestratus, followed by P. atienus, H. obsoietus, and E. lineolatrus. Low traps were more effective in capturing the females of N. fenestratus and P. alienus and the males of all of the species, except N. fimestratus at one site. Sex ratio was male-biased for N. jenestratus in both agroecosystems at both trap heights, and only in low traps for H. obsoletus and P. alien us at one site. Insect abundance, temporal population dynamics, and dispersal patterns showed considerable fluctuations according to vineyard agroecosystems and years. In the current study, all of the four phloem-feeding vectors were not found homogeneously in the vineyards, and they were aggregated in correspondence with their herbaceous wild-plant hosts. Insects tended to disperse from the borders toward the vineyard, or vice versa. Colonizing pattern was strongly affected by border vegetation, fallow fields, and vineyard ground-cover vegetation. Different plant communities were identified inside die ag,,roecosystems, and significant correlations among insect and plant-species abundances were recorded. Data highlight ate importance of understanding the dispersal patterns of vector species for the application of correct integrated pest-management strategies.
2013
R. L. Minuz;N. Isidoro;S. Casavecchia;G. Burgio;P. Riolo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/313522
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