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Filtering by: Creator Landgren, Chal Degree Name Master of Science (M.S.)

Parasitoid wasps of Douglas-fir Needle Midge (Contarinia pseudotsugae Condrashoff,1961) larvae in two Christmas tree farms, Willamette Valley, Oregon

Creator:

Voyvot, Saliha

Abstract:

Douglas-fir needle midge (Contarinia pseudotsugae, Diptera: Cecidomyiidae) is a native invasive species in Pacific Northwest Christmas tree farms, seed orchards, and nurseries where Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) is present. Douglas-fir needle midge (DFNM) causes discoloration and galls on the needles, thereby it affects the market value of the Christmas...

Resource Type:

Masters Thesis

Full Text:

Joshua Vlach, Max Ragozzino, Thomas Valente, Chal Landgren, and Christine Buhl for their suggestions at