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AIFST Fresh Produce Food Safety Summit
Aphids & Viruses
Broccoli Export Seminar
Carabid beetles as sustainability indicators
Clubroot - Nursery Access
Clubroot - Nursery Cleaning
Clubroot - Nursery Contamination
Clubroot - Nursery Design
Clubroot - Nursery Monitoring
Clubroot - Nursery Response
Clubroot - Nursery Sources
Hangzhou Foods
IPM - approach to Potato crops
IPM - approach to practice change
IPM - Potato/Tomato Psyllid
Lettuce Anthracnose Management
Native Plants - Food Safety
Native Plants - Food Standards
NY9406 Downy Mildew on seedlings - factsheet
NY9406 Downy Mildew on seedlings - report
NY9406 Downy Mildew on seedlings - review
NY97011 Downy Mildew on seedlings - extension
NY97011 Downy Mildew on seedlings - notes
Parsley Disease Handbook
Parsnip Variety Trials
Phytochemical composition of food
Phytochemicals and Healthy Foods
Reclaimed water - risk model
Reclaimed water use in Victoria
Recycled Water Quality - Lettuce
Sclerotina - Lettuce Conference 2002
Strategies for Control of Root Rot in Apiaceae Crops
Summer Root Rot in Parsley
Thrips & Viruses
Tobamoviruses
Vegetable Disease Program
Vegetable Diseases in Australia
Vegetables Viruses
VG00013 Leek Diseases
VG00016 Environmental Performance
VG00026 IPM Eggplant & Cucumber
VG00031 Peas - downy mildew & collar rot
VG00031 Peas - Downy Mildew - metalaxyl resistance
VG00034 Capsicum & Chillies - weed control
VG00044 Clubroot - Applicator design
VG00044 Clubroot - Chemical control
VG00044 Clubroot - Implementing a control strategy
VG00044 Clubroot - Managing outbreaks
VG00044 Clubroot - Nutritional amendments
VG00044 Clubroot - Strategic application
VG00044 Clubroot – Introduction
VG00044 Clubroot – Limes and liming
VG00044 Clubroot – Prevention & Hygiene
VG00044 Clubroot – Understanding Risk
VG00044 Total Clubroot Management
VG00048 Alternate fungicides for sclerotinia control
VG00048 Brassica green manure conference paper 2004
VG00048 Brassica Green Manure Update 16
VG00048 Brassica Green Manure Update 18
VG00048 Diallyl Disulphide - DADS - trials
VG00048 Lettuce - Sclerotinia biocontrol
VG00048 Lettuce Sclerotina - Biocontrols
VG00058 Pea - Collar Rot
VG00069 Cucumber & Capsicum diseases
VG00084 Beetroot for Processing
VG01045 Bunching Vegetables - disease control
VG01049 Compost - Benefits
VG01049 Compost - Choosing a Supplier
VG01049 Compost - Getting Started
VG01049 Compost - Introduction
VG01049 Compost - Safe Use
VG01049 Safe Use of Poultry Litter
VG01082 Broccoli Adjuvant Poster
VG01082 Broccoli Head Rot
VG01096 Article - White Rot research
VG01096 Integrated Control of Onion White Rot
VG01096 Poster - Alternative fungicides
VG01096 Poster - Diallyl Disulphide - DADS
VG01096 Poster - Trichoderma biocontrol
VG01096 Poster - Trichoderma optimisation
VG01096 White Rot - Spring Onions
VG02020 Capsicum - Sudden Wilt
VG02035 Capsicum - virus resistance
VG02105 Vegetable Seed Dressing Review
VG02118 White Blister
VG03003 Lettuce - Varnish Spot
VG03092 Lettuce - Shelf Life
VG03100 Retailing Vegetables - Broccolini®
VG04010 Maximising returns from water
VG04012 Hydroponic lettuce - root rot
VG04013 Brassica White Blister
VG04013 White Blister - Control Strategies
VG04013 White Blister - Race ID
VG04013 White Blister - Risk Forecasting
VG04013 White Blister - Symptoms
VG04013 White Blister - Workshop Notes
VG04014 Better Brassica
VG04014 better brassica - roadshow model
VG04014 better brassica - workshop notes
VG04014 Clubroot Guidebook
VG04014 Clubroot Poster
VG04015 Benchmarking water use
VG04016 Celery leaf blight - Poster
VG04016 Celery Septoria
VG04019 Nitrate & Nitrite in Leafy Veg
VG04021 Vegetable Seed Treatment
VG04025 Parsley Root Rot
VG04059 Diagnostic test kits
VG04061 White Blister - alternative controls
VG04061 White Blister - Workshop 2007
VG04062 Beetroot Study Tour
VG04067 IPM - Lettuce Aphid
VG05007 Onion White Rot - post plant fungicides
VG05008 IPM - Cultural Controls
VG05014 IPM - Native vegetation pt1
VG05044 IPM - Consultants Survey
VG05044 IPM - Grower Survey
VG05044 IPM - Lettuce Aphid Trials
VG05044 IPM - Lettuce Disease Poster
VG05044 IPM - Predatory Mites
VG05044 IPM - Project Summary
VG05045 Parsnip Canker
VG05051 Climate Change
VG05053 Rhubarb Viruses
VG05068 Baby Leaf Salad Crops
VG05073 Mechanical Harvesting
VG05090 Green Bean - Sclerotinia
VG05090 Rhizoctonia Groups
VG06014 Revegetation for thrip control
VG06024 IPM - Native vegetation pt2
VG06046 Parsley Root Rot
VG06047 Celery - Septoria Predictive Model
VG06066 LOTE Grower Communications
VG06086 IPM - Potential & Requirements
VG06087 IPM - Lettuce Aphid
VG06087 IPM - Toxicity testing
VG06088 IPM - Lettuce Aphid trials
VG06092 Pathogens - Gap Analysis
VG06092 Pathogens of Importance - poster
VG06140 Beetroot - colour quality
VG07010 Systemic aquired resistance
VG07015 Curcubit field guide
VG07070 Conference Notes 2008
VG07070 Foliar diseases
VG07070 Nitrogen & lettuce diseases
VG07070 Predicting Downy Mildew on Lettuce
VG07070 White Blister - Chinese Cabbage
VG07070 White Blister - Cultural Controls
VG07070 Workshop Notes - 2008
VG07070 Workshop Notes - 2010
VG07125 IPM - soilborne diseases
VG07126 Biofumigation oils for white rot
VG07126 New approaches to sclerotina
VG07127 White Blister - Alternative Controls
VG08020 Optimising water & nutrient use
VG08026 Pythium - field day
VG08026 Pythium - workshop 2010
VG08026 Pythium control strategies - overview
VG08107 - Carbon Footprint - workshop
VG08107 - Carbon Footprint part 1 - definitions
VG08107 - Carbon Footprint part 2 - issues
VG08107 - Carbon Footprint part 3 - calculators
VG08107 - Carbon Footprint part 4 - estimate
VG08107 - Carbon Footprint part 5 - users
VG08107 - Carbon Footprint part 6 - options
VG08426 Parsnip - Pythium Notes 2010
VG09086 Evaluation of Vegetable Washing
VG09159 Grower Study Tour- Spring Onions & Radish
VG96015 Carrot Crown Rot
VG96015 Carrot Defects - Poster
VG97042 Export - Burdock, Daikon and Shallots
VG97051 Pea - ascochyta rot
VG97064 Greenhouse Tomato and Capsicum
VG97084 Green Bean - white rot
VG97103 Celery Mosaic Virus
VG98011 Carrot - Cavity Spot
VG98048 Lettuce - Adapting to Change
VG98083 Lettuce - rots & browning
VG98085 GM Brassicas
VG98093 Microbial hazards - review
VG98093 Safe vegetable production
VG99005 Quality wash water
VG99008 Clubroot - rapid test
VG99016 Compost and Vegetable Production
VG99030 Globe Artichokes - value adding
VG99054 Onions - Theraputic Compounds
VG99057 Soil Health Indicators
VG99070 IPM - Celery
Victorian soil health
VN05010 Folicur - alternative carriers
VN05010 Onion White Rot - Fungicides
VN05010 Onion White Rot - summary
VX00012 Metalaxyl breakdown
VX99004 Clean & Safe Fresh Vegetables
Whitefly & Viruses
Contact Details
Vegetable Growers Association of Victoria

Mail Box 111,
Melbourne Markets

542 Footscray Rd,
West Melbourne, VIC, 3003

Tel: 03 9687-4707
Fax: 03 9687-4723
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VG01096 Poster - Diallyl Disulphide - DADS

This poster summarises the findings of field trials aimed at evaluating DADS (80% diallyl disulphide, Alli-Up�) as part of an integrated strategy for the sustainable control of onion white rot.

Thi work better informs vegetable growers of control options for this soil-borne disease and choose the most appropriate and effective use of chemical and biological treatments for disease management on their farms.

Onion white rot, caused by Sclerotium cepivorum, is a significant threat to production of bunching onions in vegetable farms in Tasmania, Victoria, NSW and Queensland.

In fields infested with high levels of sclerotia of S. cepivorum, crop losses to white rot range from 5 to 50% if fungicide protection is inadequate during periods when soil conditions are favourable for disease development.

Field trials evaluated the effectiveness of the germination stimulant of sclerotia DADS, used alone and in combination with fungicide and biocontrol treatments, for management of white on spring onion crops in sandy soils.

Authors
Oscar Villalta Ian Porter
Denise Wite Alison Stewart
Kirsten McLean John Hunt

Poster - Evaluation of diallyl disulphide (DADS) for integrated control of onion white rot on bunching onions
Download 97kb

Synthetic diallyl disulphide or DADS (80% diallyl disulphide, Alli-Up�) was very effective reducing the population of sclerotia of S. cepivorum in soil and disease incidence on spring onion crops.

This soil treatment applied before planting can be a cost-effective soil treatment for white rot control on commercial spring and other bunching onion crops.

DADS needs to be integrated with other control measures that protect the roots of growing plants from infection to obtain more effective disease control throughout the growing season.

For instance, when DADS was combined with correctly applied and timed fungicide treatments (eg Filan�) or early season applications of the biocontrol agent T. atroviride (Trichople Ali 52�), effective and sustainable control of white rot was obtained.

Commercialisation of DADS in Australia is being prevented by a reliable supplier of DADS, cost of treatments and costly registration process.

When registered, DADS has the potential to provide an immediate increase in return per hectare but the benefits of the treatment will persist for several cropping seasons.

Other chemical treatments readily available (eg dazomet, metham sodium) can reduce the population of sclerotia in soil but these can be too expensive and would require optimisation before their widespread use for white rot control in Australia.

Conclusions :

  • The germination stimulant of sclerotia DADS was effective reducing sclerotial numbers in soil and white rot incidence on spring onion crops.

  • When combined with appropriately timed and applied fungicide treatments, effective control of white rot on bunching onions was achieved.

  • Efficacy and application data collected by this research will support registration of DADS in Australia.

Acknowlegements :

There were many people and organisations that provided assistance to make this research possible. They include:

  • DPI personal Craig Murdoch and Slobovan Vujovic for assistance with technology transfer activities.

  • Peta Easton for technical assistance and Dr. Liz Minchinton for collection of survey data in NSW and SA.

  • John Hunt of Agrimm Technologies Ltd for his valuable advice on biocontrol trial preparation and Rob Stanic for arranging supply of Trichopel Ali52 and other products for field trials.

  • Doug Wilson and Paul Geister (NuFarm) for advice with fungicides and Elliott Chemical and Serve- Ag Research for supplying DADS for field trials.

  • Peter DalSanto (AgAware Consulting) for advice with fungicides and processing minor use permits for fungicide treatments.

  • Soheir Salib, Department of Primary Industries, Knoxfield for assistance in establishing and harvesting field trials and reviewing this manuscript.

  • The spring onion growers in Victoria who graciously allowed trials on their farms and provided assistance in their establishment, maintenance and harvest.

  • Agrochemical companies for providing samples of fungicides and other companies for supplying biological products for laboratory, glasshouse and field work.

The authors thank the members of the Steering Committe, Rocky Lamattina, Tony Lamattina, Craig Arnott, Karl Riedel and others for their valuable advice to this project.

This project was commissioned by Horticulture Australia Limited with funds frrom the Vegetable R&D levy..

The Australian Government provides matched funding for all HAL's R&D activities.


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