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Authors
Advisor(s)
Abstract(s)
The olive moth, Prays oleae (Bernard) (Lepidoptera: Yponomeutidae), is one of the
most destructive pests of olive groves in the Mediterranean basin. In recent years, the
interest in evaluating the economic importance of P. oleae has been increasing, being
loss assessment essential to the development of integrated pest management
programs (IPM). Reliable economic thresholds for the pest are associated to any IPM
practice, since enables the growers to reduce the input of pesticides and even target
their use, when necessary. The purpose of this study was to establish economic
thresholds against the fruit generation of P. oleae (Bern.) in Trás-os-Montes region
(north-eastern Portugal), where the olive moth is a key pest of olive (Bento et al.,
1997; Bento, 1999).
The study was carried out in olives of the oil-producing variety "Cobrançosa, Verdial
Transmontana and Madural", grown on non irrigated conditions and without pesticide
treatments for several years. Data of Cobrançosa variety were recorded every year
from 1993 to 2006. Olive infestation was determined in 25 fruits taken from 25 trees
selected at random in orchard, weekly collected, from the time of fruit setting until the
end of the egg-laying period. Crop losses due to preharvest fruit drop were evaluated
on 25 olive trees from fruit setting until harvest. A mathematical model is developed
which aims to establish the economic thresholds for the olive moth in Portugal. The
model takes into account several factors such as: cost and efficacy of spraying,
environmental impact, expected yield, price and crop losses.
Description
Keywords
Integrated pest management Olive Crop loss assessment Carpophagous generation
Citation
Bento, Albino; Pereira, J.A. (2008). Antioxidant activity of methanolic extracts from Cydonia oblong leaves. In 3rd European Meeting of the IOBC/WPRS Working Group “Integrated Protection of Olive Crops” Bragança: Escola Superior Agrária
Publisher
Instituto Politécnico de Bragança, Escola Superior Agrária