Root pressure in trees: a spring phenomenon
Root pressure occurs when the soil begins to warm, and when snow has melted, and icy water from snow melt has largely drained from the soil, forest soils warm quickly.
Topic: Forest Health
Showing 61 – 70 of 109 resources
More invasive plants of the sugarbush
Identifying and removing invasive plants when they are few and small is the only way to keep from having a permanent infestation, one that will be a constant annoyance and expense.
Sugarbush roots
The root systems of our trees are rather mysterious, and somewhat fragile. It pays to take precautions to protect the part of the tree that is not visible, just as we protect the rest of the tree that we can see.
The North American Maple project
The North American Maple Project, begun in 1988 with the goal of evaluating and monitoring trees from Nova Scotia to Minnesota, was initiated to answer many questions, which could be summed up as: what is the current health of sugar maple in these various regions, and is it getting better, worse, or staying the same?
Starting small
How sugarmaples regenerate themselves to produce successive crops.
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.
Invaders in the sugarbush
Invasive exotic plants are becoming more prevalent and can have a negative impact on sugarbushes. Maple producers need to know how to identify and eradicate invasives.
Cold-season patterns of reserve and soluble carbohydrates in sugar maple and ice-damaged trees of two age classes following drought
This study examines the effects of summer drought on the composition and profiles of cold-season reserve and soluble carbohydrates in sugar maple (Acer saccharum Marsh.) trees (50-100 years old or-200 years old) in which the crowns were nondamaged or damaged by the 1998 ice storm. The overall cold season reserve carbohydrate profiles in twig wood tissue of drought-stressed (DS) trees and non-drought-stressed (NDS) trees were generally similar, although differences were observed in the amount of reserve carbohydrates in DS and NDS trees. The cold-season level of starch stored in DS trees in early autumn in the wood tissue was about one-third to one-fifth that in NDS trees. The cold season sugar content in the DS trees was significantly greater than can be attributed to degradation of stored starch, only.
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.
Lecanium Scale: What A Sticky Mess!
If you have a sugarbush in the Northeast, you may have noticed brown scale insects, sticky dripping honeydew, and black sooty mold on your sugar maple leaves in 2005 and 2006. That most likely was European fruit lecanium scale, Parthenolecanium corni.