Distribution of Thrips nigropilosus (Thysanoptera: Thripidae) with different wing forms on chrysanthemums and surrounding weeds in Shizuoka Prefecture, Central Japan

Abstract

In 2015–2016, we investigated the wing forms of adult females of Thrips nigropilosus collected from chrysanthemums and nearby weeds in open fields in Shizuoka Prefecture, Central Japan. At all collection sites, the proportion of brachypterous female adults increased in October and February. Therefore, the populations collected in this study were noted to be brachypterous under a short-day photoperiod. Additionally, the proportion of individuals entering reproductive diapause was higher than that under long-day photoperiods.