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Publication
Monitorização das populações de bichado-da-macieira, Cydia pomonella L., na região de Carrazeda de Ansiães
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Advisor(s)
Abstract(s)
O bichado-da-macieira, Cydia pomonella L., é praga-chave da macieira causando
estragos com importância económica que podem atingir 80% da produção. O
acompanhamento das populações da praga é fundamental por permitir efetuar os
tratamentos com oportunidade e reduzir o número de tratamentos. Desta forma
minimizam-se: o desenvolvimento de resistências na praga, os efeitos secundários na
fauna auxiliar, e a nocividade no ambiente e na saúde humana. No presente trabalho
procedeu-se ao acompanhamento das populações de C. pomonella no Planalto de
Carrazeda de Ansiães, pelo traçado da curva de voo dos adultos e emergência em cintas
armadilhas, num pomar comercial em modo de produção integrada (MPI), e dois sem
qualquer tratamento nos últimos dois anos. Em cada pomar foram instaladas três
armadilhas do tipo Delta com feromona sexual, com contagens semanais dos adultos de
maio a outubro. Foram, também, colocadas 25 cintas armadilha, na base do tronco e na
copa, em 23 de julho e 9 de outubro, para recolha de pupas e identificação de possíveis
inimigos naturais. Os resultados mostraram um número de adultos de C. pomonella muito
superior nos pomares sem tratamento em comparação ao pomar em produção integrada.
O traçado da curva de voo mostrou um comportamento muito semelhante nos três
pomares, com três picos de capturas, nomeadamente finais de maio, junho e agosto, em
que o primeiro pico deveu-se à emergência de adultos das pupas do ano anterior e os
restantes a duas gerações distintas do inseto. De uma maneira geral, o número de pupas
recolhidas nos pomares sem tratamento foi superior ao pomar em produção integrada,
sendo superior no tronco em comparação com a copa. Independentemente da época de
amostragem o número de aracnídeos e forficulídeos foi muito superior nos pomares sem
aplicação de inseticidas, podendo estes auxiliares contribuir para a limitação natural da
praga.
The codling moth, Cydia pomonella L., is a key-pest of apple trees causing damage with economic importance that can reach 80% of production. Thus, the monitoring of pest populations for a better crop protection is of major importance minimizing the problems caused by chemical insecticides such us the development of pest resistance, side effects in the beneficial arthropods, and harmfulness in the environment and human health. In the present work, the populations of C. pomonella, in Carrazeda de Ansiães region, were studied by using sex pheromones for adult catches in Delta traps, and adult emergence in trap bands in one integrated production management commercial (MPI) orchard and two orchards without any treatment in the last two years. In each orchard, three Delta traps with sex pheromone were installed and weekly checked from May to October for adults counting. Also, twenty-five trap bands were placed at the trunk base and in the canopy and on July 23th and October 9th the traps were removed and the number of pupae and other arthropods were counted and identified. The results showed adult catches always higher in the untreated orchards compared to the integrated production orchard. Nevertheless, the flight curve showed a very similar behavior in the three orchards, with three peaks of catches, namely late May, June and August, which will probably correspond to two different generations of the insect. In general, the number of pupae collected in the untreated orchards was higher than the integrated production orchard, the same occurring in the trunk compared to the canopy. In both sampling periods, the number of arachnids and forficulids was higher in the untreated orchards. These predators could play a role in the natural control of the pest.
The codling moth, Cydia pomonella L., is a key-pest of apple trees causing damage with economic importance that can reach 80% of production. Thus, the monitoring of pest populations for a better crop protection is of major importance minimizing the problems caused by chemical insecticides such us the development of pest resistance, side effects in the beneficial arthropods, and harmfulness in the environment and human health. In the present work, the populations of C. pomonella, in Carrazeda de Ansiães region, were studied by using sex pheromones for adult catches in Delta traps, and adult emergence in trap bands in one integrated production management commercial (MPI) orchard and two orchards without any treatment in the last two years. In each orchard, three Delta traps with sex pheromone were installed and weekly checked from May to October for adults counting. Also, twenty-five trap bands were placed at the trunk base and in the canopy and on July 23th and October 9th the traps were removed and the number of pupae and other arthropods were counted and identified. The results showed adult catches always higher in the untreated orchards compared to the integrated production orchard. Nevertheless, the flight curve showed a very similar behavior in the three orchards, with three peaks of catches, namely late May, June and August, which will probably correspond to two different generations of the insect. In general, the number of pupae collected in the untreated orchards was higher than the integrated production orchard, the same occurring in the trunk compared to the canopy. In both sampling periods, the number of arachnids and forficulids was higher in the untreated orchards. These predators could play a role in the natural control of the pest.
Description
Keywords
Bichado-da-macieira Pragas Proteção integrada Research Subject Categories::FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Plant production
Pedagogical Context
Citation
Pereira, Luís Fernando; Vieira, Duarte; Pereira, J.A.; Bento, Albino (2020). Monitorização das populações de bichado-da-macieira, Cydia pomonella L., na região de Carrazeda de Ansiães. In 4º Simpósio Nacional de Fruticultura. Faro: Associação Portuguesa de Horticultura. p. 456-461
Publisher
Actas Portuguesas de Horticultura