奄美大島のハウスマンゴーにおけるチャノキイロアザミウマとアカオビアザミウマの花芽，花房ならびに果実での発生推移

Abstract

The yellow tea thrips, Scirtothrips dorsalis Hood, and the red-banded thrips, Selenothrips rubrocinctus (Giard), cause serious damage to the epicarp of the fruits of mango (Mangifera indica L.). I investigated seasonal prevalence of both these thrips species on the flower buds, inflorescences, and fruits of mango plants cultivated in greenhouses on Amami-Oshima Island. Scirtothrips dorsalis was regularly found on flower buds, inflorescences, and young fruits. The number of thrips on fruits decreased with the growth of the fruits. In contrast, Selenothrips rubrocinctus was observed only on fruits, and not found on flower buds and inflorescences. With regard to Selenothrips rubrocinctus, the number of thrips on fruits increased proportionately with the growth of the fruits. Neither Scirtothrips dorsalis nor Selenothrips rubrocinctus were observed on ripe fruits.