Attraction of bark and woodboring insects to loblolly pines as based on tree health

2016 ◽  
Author(s):  
Christiane E. Helbig
Keyword(s):  
Tree Health ◽  
Loblolly Pines

The influence of local elevation on soil properties and tree health in remnant eucalypt woodlands affected by secondary salinity

2004 ◽  
Vol 265 (1-2) ◽  
pp. 175-188 ◽  
Author(s):  
Viki A. Cramer ◽  
Richard J. Hobbs ◽  
Lyn Atkins ◽  
Geoff Hodgson
Keyword(s):  
Soil Properties ◽  
Tree Health ◽  
Eucalypt Woodlands ◽  
Secondary Salinity

Public acceptance of tree health management: Results of a national survey in the UK

2016 ◽  
Vol 59 ◽  
pp. 18-25 ◽  
Author(s):  
Lauren Fuller ◽  
Mariella Marzano ◽  
Andrew Peace ◽  
Christopher P. Quine ◽  
Norman Dandy
Keyword(s):  
National Survey ◽  
Health Management ◽  
Public Acceptance ◽  
Tree Health ◽  
The Uk

scholarly journals Development and Assessment of Ash Mortality Models in Relation to Emerald Ash Borer Infestation

2015 ◽  
Vol 41 (5) ◽  
Author(s):  
Rachel Clark ◽  
Kayla Boyes ◽  
Lori Morgan ◽  
Andrew Storer ◽  
Jordan Marshall
Keyword(s):  
Tree Mortality ◽  
Management Strategies ◽  
Health Assessment ◽  
Emerald Ash Borer ◽  
Decision Models ◽  
Correct Prediction ◽  
Tree Health ◽  
Prediction Of Mortality ◽  
Introduced Range ◽  
Wide Range

Emerald ash borer is a pest of North American ash that has caused significant mortality within its introduced range. The timeline for tree mortality, once infested by emerald ash borer, is variable for individual trees, with a small proportion surviving infestation. Using tree health assessments and signs of emerald ash borer infestation, researchers developed decision models to predict the probability of mortality. Two resulting models performed well at correctly predicting mortality (>83% correct) and significantly separating probability of mortality for those trees. Both models used diameter at breast height (DBH) and presence of bark splits, with one including percent crown dieback and the other including vigor rating (overall tree health assessment). A third model had reduced correct prediction of mortality, but was still potentially an effective model. Other tested models had shortcomings in prediction of mortality or in separation of probabilities of mortality. Using variables from three potential decision models, the year of mortality was modeled. However, specific year prediction was not as effective. Because of a wide range of external factors, prediction of a specific year of mortality may not be appropriate. Using DBH and rapid health and infestation assessment data, the authors were able to correctly predict ash mortality within a three-year period for the majority of trees within this study. Management strategies that use these models for developing hierarchical removal programs for infested ash may distribute financial and environmental costs over multiple years as opposed to mass removal of street and park trees.

Insects Affecting Seed Production in Red Pine: Part I Conophthorus resinosae Hopk. (Coleoptera: Scolytidae)

1956 ◽  
Vol 88 (10) ◽  
pp. 599-608 ◽  
Author(s):  
L. A. Lyons
Keyword(s):  
Seed Production ◽  
Pacific Coast ◽  
Large Numbers ◽  
The Pacific ◽  
Future Success ◽  
Loblolly Pines ◽  
Unfavourable Weather ◽  
Cone And Seed Insects ◽  
Seed Crops ◽  
Seed Insects

Natural and artificial reforestation, which basically depend on an abundance of sound seed, are adversely affected when insects destroy large numbers of cones, seeds, and cone-bearing shoots. Other factors, such as unfavourable weather, incomplete seed development, and damage by birds and mammals also reduce seed production, but they are rarely of such widespread importance as insects, whose damage often results in the failure of seed crops over large areas. Cone and seed insects sometimes restrict the natural regeneration of trees for a few years at a time, as, for example, in conifers on the Pacific coast (16), loblolly pines in Virginia (13), and oak in Michigan (5), but they become particularly important when the seeds they destroy are required for use in artificial reforestation. The future success of much reforestation, which is inclining more and more toward the use of seed obtained from trees cultivated especially for that purpose, may largely depend on a thorough understanding of cone and seed insects and their effect on seed production.

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