Dispersal Movement of Male Adults of the Diamondback Moth, Plutella xylostella (Lepidoptera: Yponomeutidae), on Cruciferous Vegetable Fields, Studied Using the Mark-Recapture Method

概要

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Dispersal movement of male adult Plutella xylostella on cruciferous vegetable fields was studied using the mark-recapture method. Pheromone traps were placed within a range of 150 m to 2,100 m from the release field, and 2,400 and 3,300 males marked with fluorescent dye were released in the autumn of 1991 and summer of 1992, respectively. The total proportion of recaptured moths was 4.9% (autumn) and 2.6% (summer). In the summer, 19.8% of total recaptured moths were caught in the surrounding fields beyond the release site, reflecting a more active dispersal movement among the fields than in the autumn experiment in which 5.9% of total recaptured moths were caught in the surrounding fields. Mean flight distance was 615 m (summer) and 286 m (autumn), but no gradual increase in the flight distance was observed throughout the sampling period in either season. The flight direction of the marked moths did not show any clear relationship to the direction of the wind. The dispersal movement in the autumn was suppressed, probably owing to the lower night temperature.
日本応用動物昆虫学会の論文
1994-08-25