Tomato spotted wilt virus and its management

In 1993, western flower thrips, an important pest of horticultural crops, was found in Western Australia. Since then there has been an upsurge in damsging virus disease epidemics caused by tomato spotter wilt virus in horticultural crops. This has occurred because western flower thrips is a more effective vector of tomato spotted wilt virus than other thrips species. Lindrea Latham and Roger Jones outline the symptoms, spread and management of this serious virus disease in vegetables and ornamentals

Crop Updates 2000 Cereals - part 3

This session covers eighteen papers from different authors: BARLEY AND OAT AGRONOMY 1. Unicorn barley must meet malting specifications to be a viable option, Roslyn Jettnerand Blakely Paynter, Agriculture Western Australia 2. Optimum oat seed rates, Glenn McDonald, Agriculture Western Australia 3. Production and Quality of export Oaten Hay (1998 and 1989), Pierre Fievez, Pierre Fievez and Associates FROST 4. Climatology of Frost in Southern Western Australia, Ian Foster, Agriculture Western Australia 5. Flowering calculator, David Tennant, Agriculture Western Australia 6. Some options for managing the risk of frost damage, Wal Anderson, Agriculture Western Australia PASTURE 7. TIMERITE® Control of redlegged earth mite in south western Australia with a spring spray to pastures, James Ridsdill-Smith and Celia Pavri, CSIRO Entomology, University of Western Australia 8. The pattern of seed softening in subterranean clover in relation to presicted false break risk, Ross Chapman and Senthold Asseng, CSIRO Plant Industry, Centre for Mediterranean Agricultural Research 9. Charano serradella – a viable option for 1:1 cropping, Steve Carr and Brad Nutt IAMA Agri-Services Western Australia and Centre for Legumes in Mediterranean Agriculture, University of Western Australia 10. Alfalfa mosaic virus in alternative annual pasture and forage legumes, Lindrea Latham and Roger Jones, Crop Improvement Institute, Agriculture Western Australia and Centre for Legumes in Mediterranean Agriculture, University of Western Australia 11. Pasture mixture performs better than single-species-based pasture – 1999, Anyou Liu, Clinton Revell and David Ferris, Centre for Cropping Systems, Agriculture Western Australia 12. Better pasture management improves performance of following crops – 1999, Anyou Liu, Clinton Revell and David Ferris, Centre for Cropping Systems, Agriculture Western Australia 13. Lucerne Benefits Crop Production, Roy Latta1, Lisa-Jane Blacklow2, Chris Matthews1 1Agriculture Western Australia 2University of Western Australia 14. Does size count? Determining optimum release number of red apion for biocontrol of doublegee, Tim Woodburn and Paul Yeoh, CSIRO Entomology/CRC Weed Management Systems, Perth 15. Herbicide tolerance of some new cultivars of annual pasture legumes, Clinton Revell and Ian Rose, Centre for Cropping Systems, Agriculture Western Australia 16. Lucerne – crop rotations in the Esperance region, Anita Lyons, Roy Latta and Chris Matthews,Agriculture Western Australia PRECISION AGRICULTURE 17. Assessing the results of on-farm experiments using yield monitors, Simon Cook and Matthew Adams, CSIRO Land and Water 18. Achiever: A GIS based achievable yield and fertiliser recommendation system for precision agriculture, Robert J. Corner, Matthew L. Adams, Precision Agriculture Research Group CSIRO Land and Wate

The epidemiology and management of fungal- and nonpersistent aphid-borne plant viruses in a Mediterranean type climate

Field, glasshouse and laboratory experiments and field surveys were done in Western Australia to develop control strategies for various non-persistently aphid-borne viruses of grain legumes, celery and carrots and for the fungally-transmitted lettuce big vein disease (LBVD). In a range of legumes, extreme resistance to Alfalfa mosaic virus (AMV) was found in Vicia faba cv. Ascot, Hedysarum coronarium cv. Grimaldi, and Lens culinaris IL5480, to Cucumber mosaic virus (CMV) in Lathyrus cicera ATC80521, L. clymenum C7022, Ornithopus sativus cv. Cadiz, and V. sativus cv. Languedoc, and to Pea seedborne mosaic virus (PSbMV) in all accessions and varieties of Cicer arietinum and L. culinaris and some of L. sativus and most pasture legumes tested. No sources of extreme resistance to Carrot virus Y (CarVY) was found to carrot germplasm. The first reports of seed transmission of AMV in Vicia faba and of CMV in Pisum sativum, V. faba, V. narbonensis and eight pasture legumes were made. No evidence for the seed transmission of CarVY was found. Plants of V. faba infected early with AMV recovered while plants infected later incurred yield losses (up to 45%). In contrast, plants of C. arietinum infected with AMV when young were killed. L. culinaris plants infected with AMV and CMV suffered high yield losses (up to 90%) dependent on the age of plants when they were infected. Plants of lettuce infected with LBVD when young often failed to form ‘hearts’ but leaf symptoms were mild, whereas later infected plants had more severe leaf symptoms. Spatial patterns of disease spread were monitored and implications for disease control discussed for CarVY and LBVD. The incidence of CarVY in carrot crops was often high in a wide selection of varieties grown throughout Australia. CarVY was determined to have a wide host range within the Apiaceae family but not in other plant families. No evidence for reservoirs of CarVY was found in species other than carrot, despite extensive surveys of known Apiaceous hosts. CarVY was readily transmitted by a wide range of aphid species in a non-persistent manner. Control strategies for Celery mosaic virus (CeMV), by instigation of a ‘celery free period’ and LBVD by combining resistant lettuce varieties and plastic mulch were demonstrated. New control measures for AMV, CMV, PSbMV and CarVY were also discussed

Tomato spotted wilt virus and its management

In 1993, western flower thrips, an important pest of horticultural crops, was found in Western Australia. Since then there has been an upsurge in damsging virus disease epidemics caused by tomato spotter wilt virus in horticultural crops. This has occurred because western flower thrips is a more effective vector of tomato spotted wilt virus than other thrips species. Lindrea Latham and Roger Jones outline the symptoms, spread and management of this serious virus disease in vegetables and ornamentals

Crop Updates 1999 - Pulse Research and Industry Development in Western Australia

This session covers seventy three papers from different authors. CONTRIBUTORS BACKGROUND SUMMARY OF PREVIOUS RESULTS 1997 REGIONAL ROUNDUP Northern Wheatbelt, Bill O’Neill, Agriculture Western Australia Central Wheatbelt, Jeff Russell, Agriculture Western Australia Great Southern and Lakes, Neil Brandon, Agriculture Western Australia Esperance Mallee, Mark Seymour, Agriculture Western Australia PULSE BREEDING AND AGRONOMY Faba Bean Variety evaluation Germplasm evaluation Genotypic variation in waterlogging tolerance, Stephen Loss, Tim Colmer and Tim Pope University of WA Sowing rate Sowing rate demonstrations, Bill O’Neill, Agriculture Western Australia Swathing Effect of seed source on early vigour, Stephen Loss, and Tim Pope University of WA Phosphorus nutrition Phosphorus x zinc interactions Desi chichpea Breeding highlights, Tanveer Khan, Centre for Legumes in Mediterranean Agriculture Germplasm evaluation Variety testing Drought tolerance, Neil Turner, Laurent Leport, Bob French, Mike Barr, Christine Ludwig, Rebecca Kenny, Tanveer Khan, and K.H.M. Siddique, Centre for Legumes in Mediterranean Agriculture, Ashley Corbet and Ivan Mock, Agriculture Victoria, and Colin Edmonson, South Australian Research and Development Institute Remobilised carbon and nitrogen: Significance for seed size and yield, Stephen Davies, Neil Turner K.H.M. Siddique and Julie Plumber, Centre for legumes in Mediterranean Agriculture Molecular markers for cold tolerance and insect resistance Heather Clarke, Centre for legumes in Mediterranean Agriculture Time of sowing 22. Sowing rate 23. Sowing rate demonstrations, Bill O’Neill, Jason Brady Agriculture Western Australia Kabuli chickpea 24. Germplasm evaluation 25. Kabuli research in the Ord Irrigation Area, K.H.M. Siddique, Bob Dhackles and Joe Sherrard, Agriculture Western Australia 26. International screening for Ascochyta blight resistance, K.H.M. Siddique and Clive Francis, Centre for legumes in Mediterranean Agriculture, N. Acikgoz, AARI, Turkey, R.S. Malholtra, ICARDA, Syria, and E.J. Knights, NSW Ag 27. Sowing rate 28. Response to phosphorus Field pea 29. Breeding highlights, Tanveer Khan, Agriculture Western Australia 30. Crop variety testing 31. Variety comparison, Quentin Knight SBS IAMA 32. of sowing 33. Standing stubble demonstration, Neil Brandon and Bill O’Neill, Agriculture Western Australia 34. Intercropping canola improves the productivity of field pea, P. Soetedjo and Lionel Martin, Muresk Institute of Agriculture, K.H.M. Siddique, Stephen Loss, Neil Brandon and Bob French, Agriculture Western Australia 35. Peaola demonstration, Jeff Russell, Agriculture Western Australia Lentil 36. International germplasm evaluation, Jon Clements, K.H.M. Siddique and Clive Francis, Centre for legumes in Mediterranean Agriculture 37. Variety evaluation 38. rate Vetch 39. Germplasm evaluation 40. Sowing rate Narbon bean 41. Germplasm evaluation 42. Agronomy, Mark Seymour, Agriculture Western Australia 43. Herbicides, Mark Seymour, Agriculture Western Australia 44. Lathyrus development, Colin Hanbury, and K.H.M. Siddique, Centre for Legumes in Mediterranean Agriculture 45. Species comparison 46. Seed priming 47. Crop desiccation Glen Riethmuller, Stephen Loss and K.H.M. Siddique, Agriculture Western Australia 48. Gypsum Neil Brandon and Stephen Loss, Agriculture Western Australia 49. Antitranspirants 50. Rhizobial inoculant improvement John Howieson, Jane Malden and Ron Yates, Murdoch University 51. Water use in cropping systems David Hall and David Tennant, Agriculture Western Australia DISEASE AND PEST MANAGEMENT 52. Chocolate spot in faba beans, Bill MacLeod and Mark Sweetingham, Agriculture Western Australia 53. Chocolate spot management 54. Botrytis grey mould of chickpea, Bill MacLeod and Mark Sweetingham, Agriculture Western Australia 55. BGM management 56. Ascochyta in chickpea, Bill MacLeod and Mark Sweetingham, Agriculture Western Australia 57. Chickpea disease survey, Simon McKirdy, Sean Kelly, Sharon Collins and Domminie Wright, Agriculture Western Australia 58. Lentil diseases, Bill MacLeod and Mark Sweetingham, Agriculture Western Australia 59. Ascochyta blight 60. Ascochyta management 61. Botrytis grey mould management 62. Virus disease, Lindrea Latham, Centre for Legumes in Mediterranean Agriculture, Roger Jones, Agriculture Western Australia 63. Alfalfa mosaic virus 64. Alfalfa mosaic and cucumber mosaic virus in lentil 65. Virus survey of faba bean. Field pea and dwarf chickling crops 66. Screening chickpea and lentil for CMV and BTMV Insect pests 67. Red-legged earth mite, Anyou Liu, James Ridsdill-Smith, Tanveer Khan, K.H.M.Siddique,, Centre for Legumes in Mediterranean Agriculture 68. Aphids and their parasites, Owain Edwards, James Ridsdill-Smith, and Rick Horbury, CSIRO Entomology 69. Budworm resistance in chickpeas, Krishna Mann, James Ridsdill-Smith, Emilio Ghisalberti, and K. Silvasithamparam, Centre for Legumes in Mediterranean Agriculture 70. Native budworm management in pulses and canola, Kevin Walden, Agriculture Western Australia 71. PULSE ADOPTION Amir Abadi and Sally Marsh, University of Western Australia 72. Does risk keep farmers from growing pulses? 73. Best Rotations Daniel Fels, Agriculture Western Australia ACKNOWLEDGMENTS PUBLICATION