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A técnica da confusão sexual como táctica potencial de protecção integrada de citrinos para a cochonilha pinta-vermelha
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Resumo(s)
The use of Red Scale DownTM for mating disruption (MD) and pest management of the
California red scale (CRS), Aonidiella aurantii (Maskell), was evaluated in a field experiment
carried out in 2007, in the Southern region of Portugal (Algarve). A total of 250 dispensers of
Red Scale DownTM per hectare were installed in four 1-2 ha sweet orange orchards, in two
applications (March and ca. 3 months later). Each dispenser contains 0.4 mg of the active
ingredients, i.e., (3S, 6R)-3-methyl-6-isopropenyl-9-decen-1-yl acetate (0.041%) and (3S,
6S)-3-methyl-6-isopropenyl-9-decen-1-yl acetate (0.025%). Three modalities of CRS
management were compared in each orchard: A) MD; B) MD + one insecticide application
(chlorpyriphos); C) MD + two or three insecticide applications (chlorpyriphos, mineral oil).
Male captures in pheromone traps were monitored every two weeks. The level of fruit
infestation by CRS was estimated before the experiment and in the end of season in order to
evaluate the effectiveness of each management modality. The results suggest that mating
disruption of CRS may be an effective tactic for pest management of CRS populations when
infestation levels are low.
Descrição
Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
Palavras-chave
aonidiella aurantii citrus pheromones mating disruption confusão sexual feromona protecção integrada pest management