LIBRO-CONGRESO-CITRUS

S16
S16P32
Monitoring and Management of Naupactus (= Asynonychus) cervinus in citrus orchards in Chile.
Luppichini P., and Olivares N.
Instituto de Investigaciones Agropecuarias (INIA), CRI, La Cruz, Chile. pluppich@inia.cl
Naupactus cervinus (Boheman) (Coleoptera: Curculionidae) is a pest rarely treated in Chilean citrus orchards.
However, the detection of several egg masses under orange and lemon fruit calix has been reported as a
refusal cause of the exported Chilean fruit. In order to improve-N.-cervinus control and to reduce its incidence
in Citrus orchards, this study raises the hypothesis that an optimal pest management requires the design of an
integrated monitoring system. Integrated pest management (IPM) assays were conducted in citrus orchards
(orange and lemon) within the Valparaíso Region. Commercial N. cervinus pesticides and a toxic barrier were
used as treatments. Prior to the application of the treatments, N. cervinus adult stage presence was monitored
in tree canopies by shaking the branches and collecting the fallen insects in a plastic sheet placed underneath
the trees. The pesticides (azinphosmetil, indoxacarb and methidathion) were applied to the tree’s canopy at
manufacturer’s recommended dose. The toxic barrier (a.i. azinphosmetil) was physically placed around the
trunk of the trees. Adults were collected from tree leaves every 15 days, 90 days after the application of the
treatments, for evaluation. Foliar applications of azinphosmetil and indoxacarb display an effective control
in orange and lemon orchards. However, the toxic barrier showed superior control performance compared
to the sprayed pesticide treatments. Therefore, we conclude that the toxic barrier is an alternative for N.
cervinus control in IPM.
S16P33
Population dynamics of citrus blackfly in Tahiti lime in the state of São Paulo, Brazil.
Felippe N. 1 , and Raga A. 2
1Pontificia Universidade Católica de Campinas, Brazil; and 2Instituto Biológico, Brazil. adalton@biologico.sp.gov.br
Field investigations on the seasonal population dynamics of the Citrus Blackfly (CBF) Aleurocanthus
woglumi Ashby (Hemiptera: Aleyrodidae) in Tahiti lime (Citrus latifolia) orchard were conducted at
Artur Nogueira municipality, São Paulo State, Brazil, from August 2011 to June 2012. Twenty leaves per
mature tree were collected at fortnightly intervals from ten previously marked trees. Under stereoscopic
microscope we evaluated the spiralling oviposition and nymphal population. CBF showed the highest peak
of oviposition during August 2011, reaching 52.9 eggs/leaf. From overall collections we obtained 23.0 eggs/
oviposition, ranging from a minimum of 7 eggs and a maximum of 53 eggs/oviposition. Approximately
92% of the ovipositional masses had between 12 and 39 eggs. CBF egg-laying is confined to the lower
leaf surface (abaxial). The highest nymphal population occurred during early April 2012, with average of
13.0 nymphs/leaf. CBF immature population declined during the wetter season (October to March). The
entomopathogenic fungus Aschersonia aleyrodis and Aegerita webberi occurred all year long and during
the rainy season.
S16P34
Integrated strategies to monitor and control Citrus Flower Moth, Prays citri Mill. (Lepidoptera:
Yponomeutidae) on nursery trees of the Mediterranean area
Conti F., and Fisicaro R.
Sicilian Region. Assessorship of Agricultural and Food Resources (SFR - OMP), Regional Plant Health Service, Italy.
fconti@regione.sicilia.it
Prays citri Mill. (Lepidoptera: Yponomeutidae), the Citrus Flower Moth (CFM), is regarded as a key pest of
nursery trees in Sicily. Larvae damage flowers and new shoots. Furthermore, young larvae can penetrate
small fruits. Growers may spray several times per year mainly with organophosphate insecticides. During the
last 5 years, a new IPM approach has been evaluated. Different pesticides were assayed and the possibility
to predict infestation by means of monitoring male flights with pheromone traps was assessed. In 2007,
296 - VALENCIA CONFERENCE CENTER, 18th-23rd NOVEMBER 2012