Treesearch

Discusses case study results of debarking whole-tree aspen and red oak chips produced with a whole-tree chipper. The results indicate promise for successful bark removal after chipping and strengthen the argument for continued research.

Describes a method for measuring pulpwood that involves photographing loads on trucks

Relationships between expected defoliation and the subsequent condition and mortality rate among the defoliated trees are almost always important factors in deciding if, when, and where to take control action against a defoliator such as the gypsy moth, Porthetria dispar (L. )

Our purpose is to examine in detail the influence of the present-day forest on flood runoff and sedimentation. Forests and flood discharge wiI1 be our dominant concern; sedimentation by and large is a byproduct of their interaction. This paper was prepared for foresters, conservationists, and others acquainted with the processes and terminology of the hydrologic cycle. It is by no means an exhaustive review of the literature; rather, we describe relationships and introduce concepts that, with minimal reference, seem to us convincingly demonstrated.

The culture filtrate of Ceratocystis fagacearum contains a mannan that produces some symptoms similar to oak wilt in red oak seedlings and cuttings. The mannan has a high molecular weight and a skeleton of α- (1 → 6) linked mannose units with considerable branching. Some similarities to commercial yeast mannan have been observed.

Eighty-six pathogenic aerobic bacterial isolates from diseased gypsy moth larvae collected in both sparse and dense populations were characterized and identified as members of the families Bacillaceae, Enterobacteriaceae, Lactobacillaceae, Pseudomonadaceae, and Achromobacteraceae. The commonest pathogens were Streptococcus faecalis, Bacillus cereus, Bacillus thuringiensis, Group C Enterobacter types, and Pseudomonas spp. However, S. faecalis and B. cereus were found operating only in the dense populations. The wide variety of potentially pathogenic bacteria encountered may indicate that,...

Pine trees can be free of blister rust infection either because they are growing in a climate unfavorable to rust or because they are genetically resistant to the rust. The climatic escape is hundreds of times more common than genetic resistance in the American white pines. The minimum time and temperature required for penetration by an isolate of the rice blast fungus (Piricularia oicizae) differed significantly from one rice variety to another. This illustrates an interrelationship between environmental influences and genetic susceptibility. In the pine rusts, the minimum conditions for...

To help the manufacturer of dimension stock supply this market effectively and profitably, we have made a study of the southern furniture industry. We concluded that the independent manufacturer of dimension stock may find it hard to increase his share of this market in the future, because most furniture plants are now making much of their own dimension stock.

We concluded that, after winter logging with a mechanical harvester, the stocking of surviving seedlings in most of the logged areas remains adequate for at least 2 years after logging.

This is a report on the potential of young even-aged hardwood stands, based on measurements made when the stands were 7 years old. It was designed to provide forest managers with data that can aid them in deciding whether or not to do early cultural work. As a basis for this appraisal, we determined for the stands: (1) the number, size, and distribution of stems; (2) the species composition; (3) the stem quality; and (4) the effect of early cultural treatments.