Wheat midge, Sitodiplosis mosellana Géhin (Diptera: Cecidomyiidae), is an invasive pest of wheat, Triticum spp. (Poaceae), in North America and is found in all wheat-growing regions of the world. Wheat midge biology, particularly post-diapause emergence of adults, varies with geographic region. The biology of wheat midge has not previously been examined in the northernmost area of its range in Canada – the Peace River region of Alberta. Wheat midge adult emergence was compared in situ to two phenological models of wheat midge emergence developed in other geographic regions. In-field adult emergence did not match the published phenological models. In the Peace River region, adults emerged later than are predicted by both models and precision for both models was low. With the Saskatchewan model, accumulated rainfall that was more than 110 mm in May and early June delayed emergence, whereas accumulated rainfall that was less than 43 mm during that period caused earlier than predicted emergence. Multiple peaks of wheat midge emergence, up to 20 days apart, were observed at some sites, supporting the Jacquemin model depicting “waves” of emergence. Including differences in soil temperature accumulation related to precipitation and optimising the model temperature thresholds would improve accuracy of the current Canadian phenological model in the Peace River region.

小麦mid ，Sitodiplosis mosellanaGéhin（双翅目：Cecidomyiidae），是小麦的入侵害虫，小麦属。（禾本科），在北美，在世界上所有小麦种植地区都有发现。小麦蚊的生物学，尤其是成年后的成年后，随着地理区域的变化而变化。小麦mid的生物学此前尚未在加拿大范围内最北端的艾伯塔省和平河地区进行过研究。在原位比较了小麦adult成虫的出苗率在其他地理区域开发的两种小麦mid的物候模型。野外成虫出现与已发布的物候模型不匹配。在和平河地区，成年动物出现的时间比两种模型都预测的要晚，并且两种模型的精度都较低。在萨斯喀彻温省模式下，5月和6月初的累积降雨量超过110毫米，从而推迟了出土，而在此期间，累积降雨量少于43毫米的时间要早​​于预计的出现。在某些地点观察到小麦mid出苗的多个高峰，相距不超过20天，这支持了描述“出苗潮”的雅克敏模型。