Bionomics of the peach fruit moth Carposina sasakii Matsumura (Lepidoptera: Carposinidae)
2008
Kawashima, K.(Aomori-ken. Agriculture and Forestry Research Center, Kuroishi (Japan). Apple Experiment Station)
The peach fruit moth, Carposina sasakii Matsumura, is the most destructive insect pest of apples in Aomori prefecture despite the fact that it has only one or two generations a year. If an orchard were to be left untreated for a few years it would lose its total crop from attack by the peach fruit moth. Male confusion by pheromones has become part of the control strategy of the peach fruit moth. However, since its use should be restricted to orchards in flat areas, insecticides should be preventatively applied every ten days to two weeks from mid-June to late August in the majority of orchards to meet the quality standard required by the market. The cost of insecticide applications against this moth exceeds 50% of the total costs an average apple grower in the prefecture spends on controlling pests in a year. This cost excludes the expense of controlling outbreaks of European red mite and two-spotted spider mite attributable to the side-effects of insecticides used against peach fruit moth. Although much literature on the biology of the peach fruit moth has been published, knowledge on the life history is still controversial. The main reason for this is due to the fact that sufficient numbers of insect have not been available for laboratory studies when they were required. The present author established a year round mass rearing system for peach fruit moth using cold-stored immature apples. This readily enabled the present studies to be undertaken with sufficient numbers of insects.
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