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Second Growth Timber Worth Holding in Northern Rocky Mountain Region

Board-Foot and Cubic-Foot Volume Tables for Second-Growth Redwood

Engraver beetles have a long history of causing top killing and mortality to second growth ponderosa pine stands in southwestern Idaho. On occasion when natural conditions are favorable, localized buildups occur and decline rapidly. In recent years, with accelerated logging activity in second growth stands, Ips buildups have become more prevalent. This is primarily due to the fact that logging companies prefer to work the lower pine zones early in the season then terminate and move to higher elevations and different timber types. When this happens Ips populations that have built up in slash have no new slash available and standing tree attacks occur. Repeated early logging on 3-5 year sales has caused annual losses in second growth ponderosa pine. A good example of this can be shown from the Trail Creek timber sale on the Boise National Forest. Logging terminated earlier in the season than anticipated and Ips beetles had infested the slash. Emerg­ing adults attacked 397 pines in scattered groups within and immediately adjacent to the sale area. A 100 percent cruise showed a loss of 5,609 bd. ft. of timber. The most important fact is that these second growth stands are the timber of the future.

Tables for estimating stem residues for ponderosa pine, western larch, douglas fir, and lodgepole pine in western Montana