39 research outputs found

    B819: The Spruce Budworm Outbreak in Maine in the 1970\u27s–Assessment and Directions for the Future

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    This report was initiated by the Maine Forest Service (MFS) in response to concerns that a serious effort was needed to capture the experiences and lessons learned during the 1970-85 spruce budworm outbreak in Maine. The report synthesizes the observations and experiences of land managers, as well as the principal results of recent scientific research on spruce budworm in Maine. This report briefly reviews budworm population dynamics and interactions with the forest, then describes the budworm\u27s impacts in detail. It then reviews the three principal responses: survey and detection; spraying; and silviculture and salvage. It then offers an overview of the outbreak\u27s effects and provides a summary of conclusions and recommendations for the future.https://digitalcommons.library.umaine.edu/aes_bulletin/1044/thumbnail.jp

    Using Remotely Sensed Data To Identify Areas at Risk for Hantavirus Pulmonary Syndrome

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    The 1993 U.S. hantavirus pulmonary syndrome (HPS) outbreak was attributed to environmental conditions and increased rodent populations caused by unusual weather in 1991-92. In a case-control study to test this hypothesis, we estimated precipitation at 28 HPS and 170 control sites during the springs of 1992 and 1993 and compared it with precipitation during the previous 6 years by using rainfall patterns at 196 weather stations. We also used elevation data and Landsat Thematic Mapper satellite imagery collected the year before the outbreak to estimate HPS risk by logistic regression analysis. Rainfall at case sites was not higher during 1992-93 than in previous years. However, elevation, as well as satellite data, showed association between environmental conditions and HPS risk the following year. Repeated analysis using satellite imagery from 1995 showed substantial decrease in medium- to high-risk areas. Only one case of HPS was identified in 1996
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