Location: Horticultural Crops Research
Project Number: 5358-12220-004-05
Start Date: Sep 27, 2010
End Date: Mar 31, 2013
Four fumigant treatments (including an untreated control) will be applied at two forest nurseries according to a randomized complete block design with four blocks. Four biocontrol treatments (including an untreated control) will then be applied within each fumigant-treated plot for a total of sixteen treatments. Douglas-fir seedlings will be planted into each fumigant × biocontrol treatment plot and assessed for growth. Soil will be assayed by standard dilution plate procedures for the presence of Cylindrocarpon, Fusarium, and Pythium species before and after the application of fumigant and biocontrol treatments, and at the termination of the experiment. Weed populations will be quantified within each broader fumigation plot after Douglas-fir seedlings have been planted.