Activity-density of <Emphasis Type="Italic">Pardosa cribata</Emphasis> in Spanish citrus orchards and its predatory capacity on <Emphasis Type="Italic">Ceratitis capitata</Emphasis> and <Emphasis Type="Italic">Myzus persicae</Emphasis> |
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Authors: | César Monzó Óscar Mollá Pedro Castañera Alberto Urbaneja |
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Institution: | (1) Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Ctra. Moncada-Náquera Km. 4.5, 46113 Moncada, Valencia, SP, Spain;(2) Departamento Biología de Plantas, Centro de Investigaciones Biológicas (CIB), del Consejo Superior de Investigaciones Científicas (CSIC), C/Ramiro de Maeztu, 9, 28040 Madrid, SP, Spain |
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Abstract: | The wolf spider Pardosa cribata Simon is the most abundant ground-dwelling spider inhabiting citrus orchards in eastern Spain. However, little is known about
its activity-density and its predatory role in the citrus agrosystem. Here we report on the activity-density of P. cribata monitored by pitfall traps, and on its capacity to prey on two citrus pests that appear both in the citrus canopy and the
ground cover, Ceratitis capitata (Wiedemman) and Myzus persicae (Sulzer), respectively. Pardosa cribata was present in citrus orchards throughout the year, with a peak in spring and a higher peak in summer. Pardosa cribata preyed on adults and third-instar larvae but not on pupae of C. capitata. A type II functional response was obtained for teneral-like adults, with an estimated attack rate (a′) of 0.771 ± 0.213 days−1 and a handling time (T
h) of 0.051 ± 0.013 days. Pardosa cribata also preyed efficiently on M. persicae, giving a type II functional response with an estimated attack rate and handling time of 2.833 ± 0.578 days−1 and 0.031 ± 0.001 days, respectively. The data reported here indicate that this wolf spider could play an important role
in regulating both these pests, and therefore might contribute to developing conservation biological control strategies for
citrus pests.
Handling Editor: Arne Jenssen. |
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Keywords: | Mediterranean fruit fly Green-peach aphid Functional response Generalist predator Population dynamics |
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