Researcher(s) |
Jenny Davidson Sarah Day Penny Roberts |
---|---|
Year(s) | 2019 |
Contributor | Southern Pulse Agronomy |
Trial location(s) |
Maitland, NSW
|
To identify potential yield loss from the isolates of Ascochyta lentis in PBA Hurricane XT.
None of the lentil varieties developed ascochyta blight due to the dry conditions during the season. Only few isolated lesions were developed in PBA Hurricane XT.
Ascochyta blight of lentil, caused by the fungal pathogen Ascochyta lentis, is common in lentil growing in South Australia. Infection start from infected seeds or ascospores that are blown from infected stubble during winter. Further, conidia are rain-splashed from the infected stubble and diseased plants. The national Lentil Breeding program has developed several commercial varieties that are resistance to this disease. However, the resistance in varieties, Nipper and PBA Hurricane XT were lost within three years after their commercial release due to the high variability of the pathogen population. This is particularly true for Yorke Peninsula where lentil crops are grown in close rotation producing high selection pressure for virulent forms of the pathogen. In seasons that are highly conducive to the disease up to 30% yield loss has been reported in PBA Flash, which is a moderately susceptible variety. Further, seed staining, which occur as a result of the disease decreases the market quality of the grain leading to more economic losses. The recommended practice is to apply foliar fungicides ahead of rain events starting from the vegetative stage, and especially during the onset of pod set and filling for moderately susceptible varieties such as PBA Flash. Therefore, the trial was conducted to quantify the yield losses caused by ascochyta blight in intermediate disease resistant (MRMS) variety, PBA Hurricane XT to develop more economically viable fungicide program.
Lead research organisation |
Southern Pulse Agronomy |
---|---|
Host research organisation | N/A |
Trial funding source | GRDC DAV00150 |
Related program | N/A |
Acknowledgments |
The research undertaken as part of the GRDC-funded Southern Pulse Agronomy project is made possible by the significant contributions of growers through both trial cooperation and the support of the GRDC and the authors would like to thank them for their continued support. The continued assistance in trial management from SARDI Agronomy groups at Clare, Minnipa, Struan and Port Lincoln is gratefully acknowledged and appreciated. The authors would also like to gratefully acknowledge SARDI Plant Pathology and Soil Biology groups for their scientific input and assistance, as well as advisors and grower groups involved in the project. |
Other trial partners | Not specified |
Crop type | Grain Legume: Lentils |
---|---|
Treatment type(s) |
|
Trial type | Experimental |
Trial design | Unknown |
Sow date | 20 May 2019 |
---|---|
Harvest date | Unknown |
Plot size | Not specified |
Plot replication | Not specified |
Fungicide |
Treatment | Fungicide product | Active ingredient and concentration (g/l) | Time and rate of application (l/ha)
|
Inoculant | Ascochyta lentis - Natural infection; paddock known to have virulent form present |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.