http://cfs.nrcan.gc.ca/authors/read/14550?format=title Publications by C. Dorworth en-ca 2000-08-26 00:00:00 MST 2000-08-26 00:00:00 MST webmaster@nofc.cfs.nrcan.gc.ca http://cfs.nrcan.gc.ca/publications?id=4198 Sat, 26 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=4198 http://cfs.nrcan.gc.ca/publications?id=3599 Healthy 2- to 3-year-old twig pieces with adherent foliage were collected from 3- to 10-year-old Acer macrophyllum at seven sites in coastal British Columbia and examined for the presence of endophytic fungi. Eighty-three percent of the leaves and 52% of the twigs were colonized by endophytic fungi. Fungal assemblages of leaves were dominated by Phomopsis spp., whereas Diplodina acerina was most frequently isolated from twigs. Cryptosporiopsis abietina, Glomerella cingulata (with Colletotrichum gloeosporioides anamorph), and Phomopsis spp. also occurred quite frequently in twigs at some sites. No correlations between weather conditions and any of the endophyte species were detected. Diplodina acerina and G. cingulata were the only two species with a certain potential to be employed as mycoherbicides: D. acerina is distributed over most of its hosts' range, and frequency and density of colonization are high among and within trees and some degree of virulence is present; some formae speciales of G. cingulata are already used as mycoherbicides. Sat, 26 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=3599 http://cfs.nrcan.gc.ca/publications?id=3137 Sat, 26 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=3137 http://cfs.nrcan.gc.ca/publications?id=3278 Sat, 26 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=3278 http://cfs.nrcan.gc.ca/publications?id=3279 Sat, 26 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=3279 http://cfs.nrcan.gc.ca/publications?id=3280 The Pacific Forestry Centre initiated research in biological control of forest weeds in order to provide environmentally benign alternatives to chemical herbicides and controlled burns, especially in sensitive areas. Present efforts are divided between first-order and second order studies. First-order studies are directed toward cultivating living agents and isolating metabolic fractions of these agents that might be applied to target weeds; Second order studies are directed toward stimulating the resident endophytic microflora to serve as an innate biocontrol set. Biological controls must employ native microorganisms, be reasonably target-specific, be under operator control, and be cost-effective and competitive. Sat, 26 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=3280 http://cfs.nrcan.gc.ca/publications?id=3281 Sat, 26 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=3281