Degree-day based phenological forecasting model of saddle gall midge ( Haplodiplosis marginata ) (Diptera: Cecidomyiidae) emergence

Outbreaks of saddle gall midge (Haplodiplosis marginata) affecting wheat and other cereals are difficult to anticipate and may not be identified until damage has occurred. Earlier work on this pest has shown that degree day models can be used to predict H. marginata emergence based on soil temperatures. Here, we show how the availability of regular long-term trapping data can be used to update and improve upon this earlier model by predicting...