ABSTRACT The forest landscape of the United States has changed over time, as has public concern for the trees, water, and wildlife. Early in the history of the United States, forests were viewed as an encumbrance and an inexhaustible resource, used to meet the needs of a growing nation. Around 1900, it became clear that old approaches were not sustainable and forest pathology saw its beginning....

The occurrence patterns of forest insect pests and diseases have been altered by global events such as climate change. Recent developments in improved monitoring methods tools for data analyses provide new opportunities to understand the causes consequences changes. Using a variety management tools, pest programs can mitigate influence changes on health. goal this Special Issue is improve our u...

The forests of North America provide a variety of benefits including water, recreation, wildlife habitat, timber, and other forest products. However, they continue to face many biotic and abiotic stressors including fires, native and invasive pests, fragmentation, and air pollution. Forest health specialists have been monitoring the health of forests for many years. This paper highlights some o...

bacillus thuringiensis (bt) is the most important microbial agent for biological control of insect pests of agricultural crops and forest plant. effective control of these pests mostly relies on finding and practical application of native bt isolates. in this study, 160 soil samples belong to various ecological area of mazandaran province (forest, orchard, urban, agricultural and non-vegetative...

Authors: CARROLL B. WILLIAMS, JR., is a pioneer scientist studying integrated management systems for forest insect pests and diseases, with headquarters in Berkeley. charge of the Station's field evaluation of chemical insecticides res'carch unit, with headquarters at Davis, Calif.

Herbivores and pathogens impact the species composition, ecosystem function, and socioeconomic value of forests. Herbivores and pathogens are an integral part of forests, but sometimes produce undesirable effects and a degradation of forest resources. In the United States, a few species of forest pests routinely have significant impacts on up to 20 million ha of forest with economic costs that ...

Piper methysticum, a tropical, forest-dwelling shrub, called ‘awa (ah-vuh) in Hawaiian and also known as kava, is the source of a relaxing root extract esteemed as a ceremonial beverage throughout the Pacific region. It has traditionally been grown in relatively pristine native forest ecosystems by indigenous horticulturists who made extensive varietal selections and recognized the optimal envi...