Journal ArticleDOI
Forms and degrees of resistance in Populus spp. to the Melampsora leaf rusts occurring in Australasia
TLDR
The Sub-section Albidae, the only major taxomonic grouping of Populus immune to both Melampsora larici-populina Kleb, and M. medusae Thum, leaf rusts in the field in Australasia, is worthy of fuller investigation for use in commercial and aesthetic plantings.Abstract:
Summary The Sub-section Albidae, the only major taxomonic grouping of Populus immune to both Melampsora larici-populina Kleb, and M. medusae Thum, leaf rusts in the field in Australasia, is worthy of fuller investigation for use in commercial and aesthetic plantings. Preliminary investigations indicate that race-specific resistance is common in the Aigeiros Section of Populus and this has significant implications in the establishment of clones of this Section. Rust resistance, disease progress pattern and length of growing season of clones are important considerations in the selection of clones for certain purposes in particular environments.read more
Citations
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Journal ArticleDOI
Further studies on a native Australian eucalypt forest invaded by exotic pines.
G. A. Chilvers,Jeremy J. Burdon +1 more
TL;DR: Comparative measurements have shown that during the period 1974–1981 the growth rate of pines established among the eucalypts was approximately ten times greater than that of the native trees.
Journal ArticleDOI
Development of contingency plans for use against exotic pests and diseases of trees and timber. 3. Histories of control measures against some introduced pests and diseases of forests and forest products in Australia
R. H. Eldridge,J. A. Simpson +1 more
TL;DR: Responses by quarantine and forestry authorities to the inadvertent introduction to Australia of seven economically important pests and pathogens of forest trees, or forest products, from the time of introduction to the present are described.
Journal Article
Genetic variation and inheritance of resistance to Dothistroma needle blight in Pinus radiata.
TL;DR: The strong additive genetic variation and potentially high heritability in resistance within current breeding populations of P. radiata augurs well for the successful incorporation of needle blight resistance into future breeds via traditional general-combining-ability seed orchards.
Journal ArticleDOI
Temperature sensitivity of qualitative race‐cultivar interactions in Melampsora medusae Thüm. and Populus species
S. J. Singh,W. A. Heather +1 more
TL;DR: Six mono-uredospore isolates (races) of Melampsora medusae Thiim produced qualitatively distinct reactions, in vitro, when incubated at 15 °C on leaf disks of certain cultivars of Populus deltoides Marsh, suggesting differential race-cultivar-temperature interaction in the epidemiology of M.medusae.
Journal ArticleDOI
Light Sensitivity of the Antagonism of Cladosporium Species to Races of Melampsora larici-populina Kleb. on Cultivars of Populus × euramericana (Dode) Guinier
I. K. Sharma,W. A. Heather +1 more
TL;DR: Race, cultivar, light intensity of incubation and species of Cladosporium interacted significantly to determine disease level (uredinial number) on the leaf disks and the percentage of these uredinia subsequently colonized by the Cladospora spp.
References
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Journal ArticleDOI
The Concept of Durable Resistance
TL;DR: In a recent review, Nelson suggested that the term of horizontal resistance with quantitatively expressed resistance 'horizontal resistance' was unacceptable as currently defined and implied that it was the durability of resistance that was of primary redefine horizontal resistance as resistance "that reduces the concern to the breeder".
Journal ArticleDOI
Interspecific hybridisation in poplar
R. R. Willing,L. D. Pryor +1 more
TL;DR: This proposes that at least two factors are involved, one attached to the pollen (P) and one to the stigma (S) and that the interaction of these (PS) is critically involved in the total process.
Journal ArticleDOI
Poplar rusts in Australia with comments on potential conifer rusts
TL;DR: Both M. medusae and laricipopulina have been recorded in Australia for the first time, and the possible effect of these rusts on Australian forestry is discussed, and several other rusts in Australia with known conifer aecial hosts elsewhere are listed.
Journal ArticleDOI
Reactions of poplar clones to physiologic races of Melampsora larici-populina Kleb..
M. Chandrashekar,W. A. Heather +1 more
TL;DR: Four mono-uredospore isolates of Melampsora larici-populina produced qualitatively distinct reactions on four half-sib clones of Populus deltoidesMarsh and thus were recognisable as races.
Journal ArticleDOI
Some Aspects of Poplar Rust Research in Australia
W. A. Heather,Jyoti Kumar Sharma +1 more
TL;DR: Clones of Populus spp.