Cost of root disease on white clover growth in New Zealand dairy pastures

The cost to clover growth of soil-borne root disease was measured in ten New Zealand dairy pasture soils. The average increase clover growth (weight) after soil pasteurisation was 28.5 %, but ranged from a 64 % increase (Whataroa soil) to a decrease of 11.9 % (Ruakura soil). The economic cost of red...

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Veröffentlicht in:Australasian plant pathology 2016-06, Vol.45 (3), p.289-296
Hauptverfasser: Wakelin, S.A., Eslami, Y., Dake, K., Dignam, B.E.A., O’Callaghan, M.
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container_start_page 289
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creator Wakelin, S.A.
Eslami, Y.
Dake, K.
Dignam, B.E.A.
O’Callaghan, M.
description The cost to clover growth of soil-borne root disease was measured in ten New Zealand dairy pasture soils. The average increase clover growth (weight) after soil pasteurisation was 28.5 %, but ranged from a 64 % increase (Whataroa soil) to a decrease of 11.9 % (Ruakura soil). The economic cost of reduced clover growth was determined using the Farmax Dairy Pro decision support system. In Southland and Canterbury, clover root disease was estimated to cost $750 and $715 ha −1  year −1 respectively, and in the Waikato region $1506 ha −1  year −1 . DNA-based testing of the soils detected the presence of diverse fungal, oomycete and nematode pathogen populations. A significant linear relationship was found between reduction in clover growth and group F Pythium spp. ( P  = 0.0177). The DNA-based assay indicated that Aphanomyces trifolii , a root pathogen of subterranean clover, may be present in the dairy-pasture soils. As this pathogen is currently not recognised as present in New Zealand, a definitive determination of its presence is required. Based on the high economic costs of diseases, the control of soil-borne root pathogens in New Zealand pasture is a direct means to increase profitability.
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subjects Agricultural economics
Agriculture
Biomedical and Life Sciences
Dairy farms
Decision support systems
Deoxyribonucleic acid
Disease
DNA
Ecology
Economic impact
Economics
Entomology
Life Sciences
Nematodes
Original Paper
Pasteurization
Pasture
Pathogens
Plant Pathology
Plant Sciences
Profitability
Soil testing
Soils
title Cost of root disease on white clover growth in New Zealand dairy pastures
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