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Authors
Advisor(s)
Abstract(s)
A mathematical model is presented which aims to establish the economic
thresholds for the flower generation of olive moth, Prays oleae (Bern.) in Tràs-os-
Montes (north-eastern Portugal). The model is based on observations taken between
1993 and 1998, on olives of the oil variety Cobrançosa, grown under rain-fed
conditions and without pesticide treatments for several years. It takes into account
factors such as cost and efficacy of spraying, environmental impact, expected yield,
price and crop losses. According to this model the control of the pest is justified
when the percent of flower infestation is between 4.0 % and 6.0 % during the years
of intermediate and high expected yields, (i.e., about 2400 kg/ha) and between 8.0 %
and 11.0 % in the years of lower expected yields (i.e. approximately 1000 kg/ha) for
prices usually practised in the region.
Description
Keywords
Integrated pest management Olive Prays oleae Flower generation Crop loss assessment
Citation
Bento, Albino; Torres, L. (2002). Establishment of economic thresholds for olive moth, Prays oleae (Bern.) in Tras-os-Montes region. Acta Horticulturae. ISSN 0567-7572.586, p. 805-809
Publisher
ISHS