RT info:eu-repo/semantics/article
T1 Within-field distribution of the damson-hop aphid Phorodon humuli (Schrank) (Hemiptera: Aphididae) and natural enemies on hops in Spain
A1 Lorenzana de la Varga, Alicia
A1 Hermoso de Mendoza, Alfonso
A1 Seco Fernández, María Victoria
A1 Campelo Rodríguez, María Piedad
A1 Casquero Luelmo, Pedro Antonio
A2 Produccion Vegetal
K1 Ingeniería agrícola
K1 Humulus lupulus
K1 Spatial distribution
K1 Coleoptera
K1 Coccinelidae
K1 Winged aphids
K1 Integrated pest management
AB [EN] A field trial was performed in a hop yard throughout 2002, 2003 and 2004 in order to determine the within-field distribution of Phorodon humuli (Schrank) (Hemiptera: Aphididae) and its natural enemies. The distribution of P. humuli was directly affected by the position of the hop plants in the garden, with significantly higher concentrations of aphids (p=0.0122 in 2002 and p=0.0006 in 2003) observed along the edge. However, in 2004 the plants located on the marginal plots had similar populations to those on the more inner plots. This can be explained by a higher wind speed which made it more difficult to land on edge plants first. The hop aphid’s main natural enemy was Coccinella septempunctata (Coleoptera: Coccinellidae), whose population was greatest where the aphids were most abundant with a significantly greater number of eggs (p=0.0230) and adults (p=0.0245) in 2003. Lacewing eggs were also frequently observed, with a significantly higher population (p=0.0221 in 2003 and p=0.0046 in 2004) where the aphid numbers were high. The number of winged aphids was greatest towards the margins of the garden in 2003. It is argued that the spatial distribution of the hop aphid and its natural enemies could be used to plan a sampling program and to estimate the population densities of these insects for use in integrated pest management programs.
PB Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, O.A., M.P. (INIA)
LK https://hdl.handle.net/10612/18996
UL https://hdl.handle.net/10612/18996
NO Lorenzana de la Varga, A., Hermoso de Mendoza Arocas, A., Seco Fernández, M. V., Campelo Rodríguez, M. P., and Casquero Luelmo, P. A. (2017). Within-field distribution of the damson-hop aphid Phorodon humuli (Schrank) (Hemiptera: Aphididae) and natural enemies on hops in Spain. Spanish journal of agricultural research, 15(2). https://doi.org/10.5424/SJAR/2017152-10221
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 20-may-2024