A pandora moth (Coloradia pandora Blake) outbreak began in 1991 in a ponderosa pine (Pinus ponderosa Dougl. ex. Laws) spacing study area that also included scattered sugar pine (P. lambertiana Dougl). The relation of defoliation to five tree spacings (with and without understory vegetation) was examined, and stand growth reduction...
Throughout the Applegate watershed, dense, overstocked, immature stands of mixed
conifers and hardwoods and declining stands of mature conifers present significant
and complex silvicultural problems. Stand stagnation is common, as is loss of largediameter
conifers from insects and wildfire. Treatments designed to maintain or
encourage development of large-diameter conifers have...
"Because forest managers and geneticists need basic information about natural variations in populations of red alder, we studied conelet and seed characteristics, as well as early growth, of this species along an elevational transect in the Coast Range of Oregon."--P. .