Patchy herbivore and pathogen damage throughout the introduced Australian range of groundsel bush, Baccharis halimifolia, is influenced by rainfall, elevation, temperature, plant density and size

Sims-Chilton, N. M., Zalucki, M. P. and Buckley, Y. M. (2009) Patchy herbivore and pathogen damage throughout the introduced Australian range of groundsel bush, Baccharis halimifolia, is influenced by rainfall, elevation, temperature, plant density and size. Biological Control, 50 1: 13-20. doi:10.1016/j.biocontrol.2009.03.001


Author Sims-Chilton, N. M.
Zalucki, M. P.
Buckley, Y. M.
Title Patchy herbivore and pathogen damage throughout the introduced Australian range of groundsel bush, Baccharis halimifolia, is influenced by rainfall, elevation, temperature, plant density and size
Formatted title
Patchy herbivore and pathogen damage throughout the introduced Australian range of groundsel bush, Baccharis halimifolia, is influenced by rainfall, elevation, temperature, plant density and size
Journal name Biological Control   Check publisher's open access policy
ISSN 1049-9644
Publication date 2009-07-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.biocontrol.2009.03.001
Open Access Status
Volume 50
Issue 1
Start page 13
End page 20
Total pages 8
Editor G. E. Heimpel
M. Coll
R. Charudattan
Place of publication United States
Publisher Academic Press
Language eng
Subject C1
960405 Control of Pests, Diseases and Exotic Species at Regional or Larger Scales
050103 Invasive Species Ecology
Abstract The intensity and type of damage exerted by a biological control agent on an invasive plant is often influenced by plant architecture or size, density, distribution and phenology as well as microhabitat. Here, herbivore and pathogen damage thought to be caused by seven biological control agents introduced up to 40 years ago for control of groundsel bush (Baccharis halimifolia) is examined. Sampling was conducted throughout the known introduced range of groundsel bush in Australia to determine how damage type and intensity were influenced by rainfall, temperature, elevation, population density, average plant size and variability in plant size. Sori abundance score (characteristic of the introduced rust fungus) was higher on large plants at high rainfall. Leaf skeletonization was negatively correlated with elevation and leaf miner damage was lower in high density plant populations. Leaf hole damage increased with rainfall particularly on large plants in homogeneous sized populations. Stem-borer damage increased with plant size, but this relationship was influenced by rainfall and plant population density. There was less stem-boring in large populations but the strength of the relationship was influenced by temperature and variation in plant size. Overall considerable variation in intensity of herbivore and pathogen damage was found throughout the range of groundsel bush. If herbivore and pathogen damage impact on plant vital rates and demography it would be expected that biological control success for this species would be patchy and depend on plant size, population density and site location.
Keyword Baccharis halimifolia
Aristotelia ivae
Bucculatrix ivella
Megacyllene mellyi
Hellensia balanotes
Rhopalomyia californica
Trirhabda bacharidis
Puccinia evadens biological control
Asteraceae
Long-term evaluation
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP0771387
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Biological Sciences Publications
Ecology Centre Publications
 
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Created: Wed, 15 Jul 2009, 01:18:16 EST by Hayley Ware on behalf of School of Biological Sciences