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A traça-verde (Palpita vitrealis (Rossi)) nos olivais da Beira Interior-Sul e o seu impacte em diferentes cultivares
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Orientador(es)
Resumo(s)
In order to control the Jasmine Moth, Palpita vitrealis (Rossi), the population evolution
was studied in several olive cultivars (‘Arbequina’, ‘Cobrançosa’, and ‘Galega Vulgar’)
located in an olive grove in Quinta do Galvão in Cova da Beira.
The young larvae feed on the leaf underside and as they grow consume whole leaves
and shoots. The second generation feed on fruit and seeds if high levels of population are
achieved (Grossley, 2000). The larvae development is not well synchronised and is
temperature-dependent, resulting in the simultaneous presence of eggs, different larval
stages, pupae, and adults throughout the season (López-Villalta, 1999).
This grove was monitored from March to November 2010, registering catches by traps
baited with sex pheromone and observing shoots attacked using the risk assessment
according to the national standards of integrated pest management. These data were
compared with catches in various regions in the country collected through similar
methodology. It was requested data of catches of P. vitrealis in these three warning stations
(Baixo Alentejo, Ribatejo, and Beira Interior-Sul), due to low catches recorded in the olive
grove of Cova da Beira, in order to compare the pest flight curves from various regions of the
country.
In the olive grove of Cova da Beira it was found that the cultivar 'Cobrançosa' was the
least attacked (90.9 shoots attacked on average). Apparently, this value was not due, to
differences in the cultivar leaf thickness. It was also observed low catches of Jasmine Moth
(0-8 catches per week) in Cova da Beira, Beira Interior Sul, and Ribatejo, although in Baixo
Alentejo it was referred high flight peaks (about 50 catches in some weeks) by the official
agricultural advisory services.
A contaminant morphotype was caught in the pheromone traps at Cova da Beira but a
specific identification was not achieved yet.
Three different brands of sex pheromones (Biosani, AT&F, and Russell) were used to
test their efficacy and potential. It was concluded that the AT&F sex pheromone revealed
some potential, since it was the only one that obtained pest catches at the beginning of
autumn, with rather low temperatures.
Descrição
Mestrado em Engenharia Agronómica - Hortofruticultura e Viticultura - Instituto Superior de Agronomia
Palavras-chave
Olea europaea palpita vitrealis cultivars risk assessment monitoring
Contexto Educativo
Citação
Mateus, Helena Sofia Pina Vieira - A traça-verde (Palpita vitrealis) nos olivais da Cova da Beira-Sul e o seu impacte em diferentes cultivares. Lisboa: ISA, 2011