101 research outputs found
Deux variations sur le thème de la consistance d'arcs : maintien et renforcement
établir un niveau de consistance partielle au sein d'un problème de satisfaction de contraintes est une étape importante, sinon nécessaire, de son processus de résolution. Ce rapport présente deux variations sur le thème de la consistance d'arcs qui reste aujourd'hui le niveau de consistance le plus souvent sollicité en pratique. La première variation est une extension de la consistance d'arcs classique au cadre des problèmes de contraintes dynamiques. Ces problèmes possèdent un cycle de vie dù à des interactions avec l'utilisateur qui peut ajouter et retirer des contraintes à tout moment. Le problème principal est alors de maintenir la consistance d'arcs à travers le retrait de contraintes. La seconde variation traite d'un léger renforcement de la condition qui caractérise la consistance d'arcs afin d'offrir une meilleure capacité de filtrage des domaines. Le niveau de consistance partiel obtenu se situe entre la consistance d'arcs et la consistance de chemins, conserve les bonnes propriétés de la première et reste bien moins coùteuse que la seconde
PROSE : une boite a outils fonctionnelle pour l'interpretation de contraintes : guide d'utilisation
Disponible dans les fichiers attachés à ce documen
Test detects resistant green peach aphids in lupins
Confirmation of insecticide resistance in green peach aphid in Western Australia\u27s lupin crops means farmers will have to choose insecticides much more carefully to control this pest. Resistance within an aphid population varies, and when resistant aphids are no longer exposed to insecticides, they may revert back to being susceptible in as little as one generation. Furthermore, when these revertant populations are exposed to the same insecticides in the future, resistance quickly reoccurs. In this article, the authors discuss a test to determine the extent of insecticide resistance in green peach aphid and how to manage it
Biological control of doublegee : Doublegee decline and the dock aphid
Since 1990 farmers in the Western Australian wheatbelt have been reporting doublegee plants that appear to be diseased, stunted and producing poorly formed fruit (the spiny casing around the single doublegee seed). Often no obvious cause of this decline in plant health is apparent. Experiments carried out in 1990 showed that an aphid, which feeds hidden in the growing tips of doublegee stems and in young distorted leaves, is the most likely cause. This North American aphid, the dock aphid (Brachycaudus rumexicolens), arrived in WA in 1987. It appears to only feed on docks, doublegees and related plants and is not known as a pest of crops. Infested doublegee plants produce small seeds that have low viability and almost no dormancy. The aphid\u27s presence will contribute to the biological control of docks and doublegees
Deux variations sur le thème de la consistance d'arcs : maintien et renforcement
établir un niveau de consistance partielle au sein d'un problème de satisfaction de contraintes est une étape importante, sinon nécessaire, de son processus de résolution. Ce rapport présente deux variations sur le thème de la consistance d'arcs qui reste aujourd'hui le niveau de consistance le plus souvent sollicité en pratique. La première variation est une extension de la consistance d'arcs classique au cadre des problèmes de contraintes dynamiques. Ces problèmes possèdent un cycle de vie dù à des interactions avec l'utilisateur qui peut ajouter et retirer des contraintes à tout moment. Le problème principal est alors de maintenir la consistance d'arcs à travers le retrait de contraintes. La seconde variation traite d'un léger renforcement de la condition qui caractérise la consistance d'arcs afin d'offrir une meilleure capacité de filtrage des domaines. Le niveau de consistance partiel obtenu se situe entre la consistance d'arcs et la consistance de chemins, conserve les bonnes propriétés de la première et reste bien moins coùteuse que la seconde
Integration d'outils pour l'expression et la satisfaction de contraintes dans un generateur de systemes experts
Les langages à base de contraintes apparaissent comme des outils efficaces pour la modélisation, la simulation et la résolution de problèmes. L'intégration d'un système de gestion de contraintes à base de dépendances dans un générateur de systèmes experts renforce la puissance de chacun des deux outils. Néanmoins, les langages de contraintes classiques se révèlent mal adaptés à la gestion d'environnements tels que les bases de faits des systèmes experts. Nous présentons dans ce papier une représentation des contraintes à caractère réflexif. Les méta-contraintes qui en résultent permettent la gesiton explicite de l'ensemble des dépendances des contraintes de niveau objet. On conserve ainsi non seulement la cohérence des valeurs du réseau de contraintes mais aussi la cohérence du réseau lui-même vis-à -vis de la base de faits. Cette représentation implique des changements importants sur l'algorithme de propagation de contraintes classique
Etude et réalisation d'un ensemble de primitives pour la satisfaction de contraintes en domaines finis
Disponible dans les fichiers attachés à ce document
Crop Updates 1999 - Oilseeds
This article contains eighteen papers
INTRODUCTION, Paul Carmody, Agriculture Western Australia
PLENARY SESSION
Transgenic canola in Western Australia: Outlook and challenges, Phil Salisbury, University of Melbourne
Farming system issues for herbicide tolerant canola, Rick Madin, Rick Madin and Associates, David Bowran, Agriculture Western Australia
Beating blackleg in 1999, Martin Barbetti, Ravjit Khangura, Paul Carmody, Graham Walton, Agriculture Western Australia
The Mustard Industry in Australia – Opportunities for a new oilseed, Phil Parker, NSW Agriculture
Management of blackleg with fungicides, Ravjit Khangura and Martin Barbetti, Agriculture Western Australia
Effect of aphid feeding damage on canola yields in 1998, Francoise Berlandier and Linnet Cartwright, Agriculture Western Australia
Post-anthesis duration and rainfall affect oil content of canola, Ping Si, University of West Australia, Graham Walton, Agriculture Western Australia, Nick Galwey and David Turner, University of West Australia
Canola responded to high rates of fertiliser in 1998, Wayne Pluske, CSBP
Impact of agronomic practices on canola quality, Graham Walton, Agriculture Western Australia
Survey reveals widespread infection with two virus diseases in Western Australian canola crops, Roger Jones and Brenda Coutts, Agriculture Western Australia
Calculating canola yields and oil contents as a function of soil and fertiliser nitrogen supply, Bill Bowden and Isabel Arevalo-Vigne, Agriculture Western Australia
Canola benchmarks 1997/98 – Central Eastern District, Jeff Russell, Agriculture Western Australia
Seeding rate affects the yield and some architectural features of canola, Syed H. Zaheer, Nick W. Galwey and David Turner, University of Western Australia
Foliar applied fungicides for blackleg, Andrew Simon and Art Diggle, Agriculture Western Australia
Farm based demonstration 1998 canola N – Wheel evaluation, Jeff Russell, Agriculture Western Australia
Effect of sowing date on seed yield of canola, Dave Eksteen, Agriculture Western Australia
Investigating water use of summer crops on the South Coast of Western Australia, Arjen Ryder, Agriculture Western Australia, Bill Crabtree, Western Australia No Till Farming Association, Serena Wyatt, Catchment Landcare Coordinator, Wellstead, Jim Baily, Subasio Downs, Wellstead
INTRODUCTION, Paul Carmody, Agriculture Western Australia
PLENARY SESSION
Transgenic canola in Western Australia: Outlook and challenges, Phil Salisbury, University of Melbourne
Farming system issues for herbicide tolerant canola, Rick Madin, Rick Madin and Associates, David Bowran, Agriculture Western Australia
Beating blackleg in 1999, Martin Barbetti, Ravjit Khangura, Paul Carmody, Graham Walton, Agriculture Western Australia
The Mustard Industry in Australia – Opportunities for a new oilseed, Phil Parker, NSW Agriculture
Management of blackleg with fungicides, Ravjit Khangura and Martin Barbetti, Agriculture Western Australia
Effect of aphid feeding damage on canola yields in 1998, Francoise Berlandier and Linnet Cartwright, Agriculture Western Australia
Post-anthesis duration and rainfall affect oil content of canola, Ping Si, University of West Australia, Graham Walton, Agriculture Western Australia, Nick Galwey and David Turner, University of West Australia
Canola responded to high rates of fertiliser in 1998, Wayne Pluske, CSBP
Impact of agronomic practices on canola quality, Graham Walton, Agriculture Western Australia
Survey reveals widespread infection with two virus diseases in Western Australian canola crops, Roger Jones and Brenda Coutts, Agriculture Western Australia
Calculating canola yields and oil contents as a function of soil and fertiliser nitrogen supply, Bill Bowden and Isabel Arevalo-Vigne, Agriculture Western Australia
Canola benchmarks 1997/98 – Central Eastern District, Jeff Russell, Agriculture Western Australi
Crop Updates 2000 - Lupins
This session covers nineteen papers from different authors:
1.1999 Lupin Highlights, Bill O’Neill, LUPIN PRODUCTIVITY IMPROVEMENTS AND INDUSTRY DEVELOPMENT
LUPIN ANTHRACNOSE
2. Anthracnose – 1999/2000, Geoff Thomas and Mark Sweetingham, Agriculture Western Australia
LUPIN BREEDING AND AGRONOMY
3. The genetic control of mildly restricted branching in narrow-leafed lupin (Lupinus augustifolius L), Kedar Adhikari1,3, Nick Galwey1,3 and Miles Dracup2,3 1Plant Sciences, University of Western Australia 2Agriculture Western Australia 3Cooperative Research Centre for Legumes in Mediterranean Agriculture, University of Western Australia
4. Genotype x time of sowing interaction in lupins – Mingenew, Bob French, Agriculture Western Australia
5. Genotype x time of sowing interaction in lupins – Wongan Hills, Bob French, Agriculture Western Australia
6. Genetic variation in lupin tolerance to Brown Leaf Spot, Bob French, Agriculture Western Australia
7. Yellow lupin management in Western Australia, Bob French, Agriculture Western Australia
APHIDS AND VIRUS CONTROL
8. Forecasting aphid and virus risk in lupins, Debbie Thackray, Jenny Hawkes and Roger Jones, Centre for Legumes in Mediterranean Agriculture and Agriculture Western Australia
9. When should lupin crops be sprayed for aphids to achieve maximum yield response? Françoise Berlandier, Agriculture Western Australia
10. Yield limiting potential of the new, non-necrotic strain of bean yellow mosaic virus in narrow-leafed lupin, Roger Jones, Yvonne Cheng and Lisa Smith, Crop Improvement Institute, Agriculture Western Australia, and Centre for Legumes in Mediterranean Agriculture
LUPIN NUTRITION
11. Increasing the value of a rotation by applying lime, Chris Gazey and Michael O’Connell, Agriculture Western Australia
HERBICIDE TOLERANCE AND WEED CONTROL
12. Herbicide damage does not mean lower yield in Lupins, Peter Carlton, Trials Coordinator, Elders Limited
13. Effect of herbicides Tordonä 75D and Lontrelä, used for eradication of Skeleton Weed, on production of Lupins in following seasons, John R. Peirce and Brad J. Rayner, Agriculture Western Australia
14. Herbicide tolerance of lupins, Terry Piper, Agriculture Western Australia
15. Tanjil lupins will tolerate metribuzin under the right conditions, Peter Newman, Agronomist Elders Limited and Cameron Weeks, Mingenew/Irwin Group
LUPIN ESTABLISHMENT
16. A new seed pressing system for ryegrass suppression and healthy lupin establishment, Mohammad Amjad and Glen Riethmuller,Agriculture Western Australia
17. Banded surfactant for better lupin yield on non-wetting sand, Dr Paul Blackwell, Agriculture Western Australia
DROUGHT TOLERANCE
18. Drought tolerance of lupin genotypes in Western Australia, Jairo A. Palta1,2,, Neil C. Turner1,2, Robert J. French2,3 ,1CSIRO Plant Industry, Centre for Mediterranean Agricultural Research, 2Centre for Legumes in Mediterranean Agriculture, University of Western Australia, 3Agriculture Western Australia,
19. Stem carbohydrate in lupins: a possible buffer to maintain seed growth under adverse conditions, Bob French1, Tim Setter2, Jairo Palta3 , 1Agriculture Western Australia, and CLIMA, 2Agriculture Western Australia, 3CSIRO, Floreat Park, and CLIM
Crop Updates - 2003 Oilseeds
This session covers fifteen papers from different authors
ACKNOWLEDGMENTS
VARIETIES
Large scale canola varietal evaluation in WA, Peter Nelson, Oilseeds WA
Performance of IT and TT canola varieties in the medium and high rainfall agzones of WA 2001-02, Graham Walton, Hasan Zaheer and Paul Carmody, Department of Agriculture
QUALITY
Reproductive biology, cotyledon development and oil accumulation in canola, J.A. Fortescue and D.W. Turner, School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia
Plant and environmental factors affecting oil concentration in canola – a mini-review, D.W. Turner, School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia
Potential benefits from interspecific crosses between canola and ‘near canola’ quality Indian mustard, Janet Wroth, School of Plant Biology, The University of Western Australia (UWA), Wallace Cowling, School of Plant Biology, UWA and CBWA Pty Ltd, Anh-Van Pham, School of Mathematics and Statistics, UWA
NUTRITION, AGRONOMY AND MACHINERY
Timing of nitrogen application for producing canola grain and oil, R. F. Brennan, Department of Agriculture
Managing canola for soil type and moisture stress, Paul Carmody and Hasan Zaheer Department of Agriculture
Machinery lessons from 2002 – canola establishment, Glen Riethmuller, Greg Hamilton and Jo Hawksley, Department of Agriculture
Machinery lessons from 2002 – harvesting short crops, Glen Riethmuller, Department of Agriculture
Does increasing canola seeding rate reduce the competitiveness of grass weeds? Zaicou-Kunesch, C.M., Zaheer, S.H. and Eksteen, D, Department of Agriculture
PESTS AND DISEASES
Aphid damage to canola – not all cultivars are equal, Françoise A. Berlandier and Christiaan Valentine, Department of Agriculture
Should we be worried about developing insecticide resistance in aphids? Owain Edwards, CSIRO Entomology
Benefits provided by treating canola seed with imidacloprid seed dressing, Roger Jones, Brenda Coutts, Lisa Smith and Jenny Hawkes, Department of Agriculture, and Centre for Legumes in Mediterranean Agriculture
Blackleg levels in canola in 2002, Ravjit Khangura1, Moin Salam1, Art J Diggle1 and Martin J Barbetti1,2 1Department of Agriculture, 2University of Western Australia
DBM in canola, Kevin Walden, Department of Agricultur
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