In the early 1980s, deterioration in the crown condition of trees across many regions of Europe raised concerns over the health of European forests, and many countries established surveys to monitor this. In Britain, the Forest Condition Survey was instigated in 1984 (Binns et al., 1985) with an annual assessment of tree crown density on between 300 and 400 plots of five widely planted forest t...

Open-pollinated white oak (Quercus alba L.) acorns were collected and stored at 4 °C in November 2004. Three days before sowing in early December, we treated germinating acorns in fi ve ways: no surgery (C); one half of the radicle cut off (HR); whole radicle cut off (WR); one cotyledonary petiole severed (OP); and both cotyledonary petioles severed, which resulted in no embryo axis (NE). Seedl...

Epidemic populations of red oak borer, Enaphalodes rufulus (Haldeman), a native wood-boring cerambycid beetle, appear to be a primary factor contributing to oak mortality across the Ozark Mountains of Arkansas, Oklahoma and Missouri. We developed a rapid estimation procedure (REP) to quickly, non-destructively and economically assess current density and infestation history of red oak borer in n...

BACKGROUND Although the flora of the State of Nuevo León is well known, there are few records of ethnobotancial information. An ethnobotanical study was undertaken in order to know the medicinal plants used by people living at the scrublands and oak-pine forest areas in the southern Nuevo León. Collection of plants specimens and interviews were carried out among the people of the municipalities...

While little research has been done on California grassland birds, their populations are thought to be declining due to habitat loss, fragmentation, and degradation. We investigated the association between California grassland birds and their landscape-scale habitat matrix. The habitat is a mosaic of valley grassland with blue oak and coast live oak woodlands. In this study, we used logistic re...

This review describes in chronological order the events surrounding the discovery in California of the causal agent of the forest disease known as Sudden Oak Death. We hope it will not only provide the reader with a basic synopsis of what is known about this novel pathosystem, but also relate the human and societal aspects of a unique experience for a group of scientists involved in highly visi...

Oak decline and related mortality have periodically plagued upland oak-hickory forests, particularly oak species in the red oak group, across the Ozark Highlands of Missouri, Arkansas and Oklahoma since the late 1970s. Advanced tree age and periodic drought, as well as Armillaria root fungi and oak borer attack are believed to contribute to oak decline and mortality. Declining trees first show ...

Movement of invasive wood-boring insects in wood products presents a threat to forest health and a management challenge for public and private land managers. The goldspotted oak borer, Agrilus auroguttatus Schaeffer (Coleoptera: Buprestidae), is a new pest in San Diego and Riverside Cos., CA, believed to have been introduced on firewood. This beetle has caused elevated levels of oak mortality s...