Sugar Maple and the Pear Thrips
This tiny insect can cause major leaf “tatter” and flower damage on sugar maples and orchard trees, by feeding and laying eggs on the young leaves and flowers as the buds open in spring.
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Sugar Maple Ecology and Health: Proceedings of an International Symposium
During the past four decades, declines of sugar maple have occurred throughout its range. Each decline event has been the subject of intense research.The declines were ephemeral, preventing a complete understanding of conditions and causes.The most recent decline in Pennsylvania was the impetus to organize an international symposium on sugar maple ecology and health. Speakers from the United States and Canada were invited to share their research and explore a variety of topics concerning sugar maple history and ecology, recent sugar maple declines, nutrient and beiowground dynamics in northeastern forests, and interactions of forest health with biotic and abiotic stressors. Posters also were contributed. Attending scientists, natural resource professionals, and land managers participated in two days of talks and discussions and a day-long field trip to sugar maple decline research sites in northwestern Pennsylvania and southwestern New York.
Sugar maple growth in relation to nutrition and stress in the northeastern United States
Sugar maple, Acer saccharum, decline disease is incited by multiple disturbance factors when imbalanced calcium (Ca), magnesium (Mg), and manganese (Mn) act as predisposing stressors. Our objective in this study was to determine whether factors affecting sugar maple health also affect growth as estimated by basal area increment (BAI). We used 76 northern hardwood stands in northern Pennsylvania, New York, Vermont, and New Hampshire, USA, and found that sugar maple growth was positively related to foliar concentrations of Ca and Mg and stand level estimates of sugar maple crown health during a high stress period from 1987 to 1996. Foliar nutrient threshold values for Ca, Mg, and Mn were used to analyze long-term BAI trends from 1937 to 1996. Significant (P <= 0.05) nutrient threshold-by-time interactions indicate changing growth in relation to nutrition during this period.
Sugar Maple Health & Climate Change
There has been a lot of research over the years investigating the health and productivity of sugar maple in Vermont and the broader region. What do these findings tell us about how sugar maple might fair under a changing climate? Are there strategies that can be used to bolster the resilience of sugar maple?
Sugar Maple Health and Management
Most of us understand how to tap trees, gather sap and produce maple syrup. Yet, one of the most important and least thought about tasks of a sugar bush owner is maintaining the health of the sugar maples. To do that effectively, the majority of us can greatly benefit from the help of a professional forester.
Sugar Maple Height-Diameter and Age-Diameter Relationships in an Uneven-Aged Northern Hardwood Stand
Sugar maple height-diameter and age-diameter relationships are explored in abalanced uneven-aged northern hardwood stand in central New York.
Sugar Maple Sap Yields Using One or Two Tapholes Per Tree
Studies currently underway at the University of Vermont Proctor Maple Research Center (PMRC) are examining the effects of accumulating internal taphole damage on the ability to support future tapping, as well as related subjects such as the effects high vacuum sap extraction might have on tree growth, all with the goal of developing new sustainable tapping guidelines. However, along with focusing on the possible negative effects of tapping and sap extraction, it is important to examine how certain practices might lead to greater sap yields.
Sugar Maple Tree Improvement Program
Maple producers and rural landowners throughout the maple syrup producing regions of the Northeast have expressed interest in acquiring improved sugar maple seedings for future sap production. A sugar maple tree improvement program for high sap concentration began in the 1960s under the direction of the USDA Forest Service.
Sugar Maple/Ginseng Research Projects
This project was conducted to determine if ginseng could be cultivated in a sugar maple forest for alternative income.
Sugar Profiles of Maple Syrup Grades
Although many analyses of the chemical composition of maple syrup have been conducted, relatively little information exists on the differences in composition of the individual syrup grades. As a first step in acquiring this information we performed a study to determine the characteristic sugar composition of each maple syrup grade.