The Association of Yeasts with Certain Bark Beetles

Publisher Website
Google Scholar
Abstract
A survey was made of yeasts occurring in different metamorphic stages of bark beetles Dendroctonus brevicomis, D. monticolae, P. jeffreyi, D. valens, Ips oregoni, I. confusus, and I. emarginatus. All isolations were made, after dissection, from interior part. Host trees studied were Pinus ponderosa, P. jeffreyi, P. monticola, P. contorta var. latifolia and P. lambertiana, all growing in Northern Calif. 169 yeasts were isolated and identified. Taxonomic designation and numbers of isolates obtained were as follows: Saccharomyces pini (32), Hansenula capsulata (36), Pichia haplophila (3), Candida silvicola (70), C. curvata (15), C. parapsilosis (2), C. mycoderma (3), C. rugosa (1), Torulopsis nitratophila (1), T. melibiosum (2), Rhodotorula crocea (1), Cryptococcus diffluens (2), Cr. neoformans (1). Results tend to show that S. pini is most common yeast found in D. brevicomis and C. silvicola is most prevalent in I. oregoni, while IX monticolae contained representatives of all 3 major spp. of yeast. Certain typical physiological properties of yeast isolates arc discussed.