
The Douglas-fir Needle Midge (Contarinia pseudotsugae) is host specific to only Douglas-firs. The insect infests needles & symptoms create a twisted distortion having yellow banding discolorations with swollen areas. Inside the swollen areas of the needle are fly larvae (maggots) of the Douglas-fir needle midge (DFNM). Typically scouting observations for needle infestations can begin to […]
Continue reading...