Preplant soil treatments were implemented to determine effects on populations of potentiallypathogenic
Fusarium and potentially disease-suppressive Trichoderma spp. as well as root
colonization by these and other selected fungi on healthy-appearing, bare root 2-0 western white pine seedlings at the USDA Forest Service Nursery, Coeur d'Alene, Idaho. Soil treatments included...
Tests were conducted at the USDA Forest Service Nursery, Coeur d'Alene, Idaho to evaluate
effectiveness of spring fumigation with dazomet to improve survival and performance of Douglas-fir
and western white pine transplants. Spring fumigation greatly reduced populations of potentially
pathogenic Fusarium and Pythium spp. Disease levels of container (plug+1) and...
A preliminary evaluation of the biological control
formulation of Trichoderma harzianum marketed
as BioTrek® was conducted on bareroot Douglasfir
and western white pine seedlings at the USDA
Forest Service Nursery, Coeur d'Alene, Idaho.
The biocontrol material was applied topically on
seed shortly after sowing and comparisons made
between treated and...
White pine plantations which were established in 1968 on 88 acres of the Palouse Ranger District, Clearwater
National Forest, were treated by pruning and canker excision to remove lethal white pine blister rust cankers.
The success rate 15 months after treatment was 98 percent for pruning and 81 percent for...