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Hangzhou Foods
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NY9406 Downy Mildew on seedlings - factsheet
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Phytochemical composition of food
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Reclaimed water use in Victoria
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Summer Root Rot in Parsley
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Vegetable Disease Program
Vegetable Diseases in Australia
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VG00013 Leek Diseases
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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
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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
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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
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VG02020 Capsicum - Sudden Wilt
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VG02105 Vegetable Seed Dressing Review
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VG03100 Retailing Vegetables - Broccolini®
VG04010 Maximising returns from water
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VG04013 Brassica White Blister
VG04013 White Blister - Control Strategies
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VG04013 White Blister - Workshop Notes
VG04014 Better Brassica
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VG04014 Clubroot Guidebook
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VG04019 Nitrate & Nitrite in Leafy Veg
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VG04025 Parsley Root Rot
VG04059 Diagnostic test kits
VG04061 White Blister - alternative controls
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VG05014 IPM - Native vegetation pt1
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VG05068 Baby Leaf Salad Crops
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VG05090 Green Bean - Sclerotinia
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VG06046 Parsley Root Rot
VG06047 Celery - Septoria Predictive Model
VG06066 LOTE Grower Communications
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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
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VG07070 Predicting Downy Mildew on Lettuce
VG07070 White Blister - Chinese Cabbage
VG07070 White Blister - Cultural Controls
VG07070 Workshop Notes - 2008
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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
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VG08107 - Carbon Footprint part 3 - calculators
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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
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VG98085 GM Brassicas
VG98093 Microbial hazards - review
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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
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VX00012 Metalaxyl breakdown
VX99004 Clean & Safe Fresh Vegetables
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VG00058 Pea - Collar Rot

Ascochyta (Mycosphaerella pinodes) is a fungus that occurs in processing pea crops.

The processing pea industry is highly competitive with imports from New Zealand placing economic pressure on producers to continually improve their management practices to remain viable against cheaper imported product.

The production areas of Tasmania and southwest Western Australia are further disadvantaged by having a growing season confined to winter and spring rather than the usual spring and summer season found overseas.

These growing conditions provide a very high incidence of the Ascochyta fungus (Mycosphaerella pinodes), particularly in Western Australia.

Conventional treatments for the control of Ascochyta in processing peas have predominantly focussed on chemical and seed treatments. These treatments have demonstrated only minor success in controlling the fungus.

The objectives of this project were to identify the reasons Ascochyta fungus appears and whether its incidence can be minimised with the use of chemical and nonchemical treatments or cultural practices.

Author

Lloyd Williams

VG00058 Increasing the competitiveness of the Australian processing pea industry through minimising the economic impact of collar rot disease (Ascochyta) - 2004
Download 113kb

Summary :

Minimising the incidence of Ascochyta through the reduction of herbicide applications

Field trials were conducted over a three-year period to assess the effect of a number of broadleaf herbicides to minimise the number of applications required to control weeds through the life of the pea crop. With a reduction in the number of herbicide applications, the incidence of Ascochyta would be lower as minimal physical damage to the vines would occur.

The trials demonstrated that Command and Frontier Optima:

  • in combination these pre-emergent herbicides were the most effective treatment in the trials and had the longest activity spectrum of all of the herbicides

  • as a single pre-emergent spray can suffice against broadleaf weed emergence.

  • Bladex herbicide halved the number of herbicide sprays to a single application.

The relationship between soil compaction & Ascochyta

Field trials were conducted over two years (2001 & 2003) to measure the degree of soil compaction in pea crops in those areas of contact with farm machinery and in areas with no contact.

Farmers observed that areas of high soil compaction displayed high levels of Ascochyta activity that resulted in poor yield.

Methods of removing and reducing soil compaction and the resulting Ascochyta infection were investigated.

  • The research demonstrated that farm machinery caused compaction of the soil and damaged the crop resulting in potential yield losses of up to 25%.

  • The introduction of permanent roadways resulted in no damage to pea vines and reduced the risk of Ascochyta infection.

  • Crop trash may have a buffering potential against the incidence of compaction in both the roadways, tramways and within the commercial crop.

The effectiveness of fungicides in controlling Ascochyta

  • Bravo 720 was the only fungicide to show any preventative effect against Ascochyta.

  • Bravo 720 remains the sole preventative measure against the Ascochyta fungus.

Sap composition of pea vines

  • There was no significant relationship between sap composition of pea vines sampled and their sample sites.

  • There was no clear link between pea vine sap levels and the incidence of Ascochyta in the pea vine samples.

Aerial Photography

  • The plant cell density image demonstrated that the crop was far from uniform. It also showed that less than 50% of the crop was at a maximum density.

  • The true image showed the machinery paths.

  • The false image demonstrates that approximately 20% of the crop contains an optimum density of healthy plant cells in their leaves and the remainder of the crop contains a much lower density.

  • The vigour image shows that up to 50% of the crop is unhealthy.

Acknowledgements :

Input from many farmers over the three years from Kendenup pea growers and continuous support from the committee members is greatly appreciated.

Warren Lee from Vital Food Pty Ltd for your continuous assistance is thanked.

Thank you to the staff of Serve-Ag Research for your assistance and co-operation.

Project funding is by Vital Food Pty Ltd, the Kendenup Pea Growers Association and Horticulture Australia is acknowledged.

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


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