Establishment potential and wing diphenism of an invasive thrips, Frankliniella fiusca (Thysanoptera: Thripidae), in Kyoto, Japan.
The potential for the successful overwintering of female tobacco thrips. Frankliniella fusca (Hinds) (Thysanoptera: Thripidae), and seasonal changes in their oviposition and wing form composition were assessed through rearing trials under outdoor conditions in Kyoto City from 2009 to 2010. Almost all overwintering female adults did not lay eggs in January and February. Some laid only a few eggs in March and early April, although these eggs did not complete development to the adult eclosion stage. Hibernation at the larval and pupal stages was not observed during the study period. Macropterous females emerged between late May and late September, with their proportion peaking (72.1%) in August; however, they did not emerge during other periods. In contrast, all females that moulted into adults between October and December as well as in mid-May were brachyptcrs. These results suggest that under outdoor conditions in Kyoto the invasive agricultural pest F. fusca does not reproduce throughout winter and that macropterous females emerge into adults only in summer.