United States Department of Agriculture
A localized infestation of Eucosma monitorama Heinrich was studied in 1963 and 1964 in southern Wisconsin. Adults are secretive, weak flyers but several were collected in May with sticky trap-boards and light traps. Adult emergence and flight occur at time of red pine pollen release. Eggs were not found in macro- and micro-scopic examinations of...
An expert system for diagnosing pest damage of red pine stands in Wisconsin, PREDICT, runs on IBM or compatible microcomputers and is designed to be useful for field foresters with no advanced training in forest pathology or entomology. PREDICT recognizes 28 damaging agents including species of mammals, insects, and pathogens, as well as two types of abiotic damage....
The fine roots of trees are concentrated on lateral branches that arise from perennial roots. They are important in the acquisition of water and essential nutrients, and at the ecosystem level, they make a significant contribution to biogeochemical cycling. Fine roots have often been studied according to arbitrary size classes, e.g., all roots less than 1 or 2 mm in...