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Integrated pest management of nematodes in sweetpotatoes

Dennien, S. (2024) Integrated pest management of nematodes in sweetpotatoes. Project Report. Hort Innovation.


Article Link: https://www.horticulture.com.au/globalassets/laser...


The Australian sweetpotato industry ($90M farm gate value) is heavily impacted by plant-parasitic nematodes, costing an estimated $20M per year in losses (ASPG pers. com.). Root-knot nematodes (RKN) are widely distributed throughout the sweetpotato-growing areas of Queensland and northern NSW. Feeding activity affects root initiation, causes stunting, skin damage and yield loss. At project commencement there was one registered chemical (S7 classification being removed from the market) and one minor use permit for RKN control. Thus, it was crucial to find alternative control methods through soil health improvement and Integrated nematode management.

The project completed the first comprehensive nematode species survey undertaken on sweetpotato producing soils in Australia, with 85 fields sampled in an initial survey. Growers now have a greater understanding of the plant-parasitic nematodes causing yield loss and damage. A new detection of reniform nematode was made outside of the previously known range. Following the detection of guava root-knot nematode into Australia a pest alert fact sheet was produced for the industry. Experiments provided new knowledge on the effects of nematode species on sweetpotato cultivars. Results suggested that R. reniformis damage occurs at root formation resulting in fewer roots, infection with RKN (M. javanica) reduced both the number and weight of roots, and the cultivar Bellevue is moderately susceptible to M. javanica (contrary to existing information)

Item Type:Monograph (Project Report)
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Horticulture and Forestry Science
Additional Information:Includes: Appendix 1. Extension of current knowledge on soil health and nematode management Appendix 2. General nematology methods Appendix 3. Initial survey of plant-parasitic nematodes in sweetpotato production Appendix 4. Intensive growers’ survey of plant-parasitic nematodes Appendix 5. Initial Survey of sweetpotato producing soils Appendix 6. Follow on nematode surveys. Appendix 7. Diagnostic soil samples recieved Appendix 8. Weed Surveys of Bundaberg and Cudgen Sweetpotato Farms Appendix 9. The effect of pre-plant herbicide application on growth of sweetpotato cuttings. Appendix 10. Controlling sweetpotato volunteers with herbicides Appendix 11. Herbicides for the Australian sweetpotato industry: a review of possible products Appendix 12. Nematode resistance screening Appendix 13. Field evaluation of cover crops Appendix 14. The effects of biofumigants on the survival of Meloidogyne javanica in field soil Appendix 15. Sustainable farming systems trials – Nematode population monitoring Appendix 16. Sustainable farming systems trials - Soil testing as an indicator of soil health improvement Appendix 17. Sustainable farming systems trials - Biological monitoring Appendix 18. Sustainable farming systems trials - Crop yield and quality Appendix 19. The effects of Rotylenchulus reniformis on two sweetpotato cultivars Appendix 20. The effects of Meloidogyne javanica on two sweetpotato cultivars Appendix 21. Efficacy of current nematicides Appendix 22. Conference abstracts
Keywords:Final report , Sweetpotato, Nematodes, RKN, Reniform; Integrated nematode management; Soil health, Carbon, Nematode resistance.
Subjects:Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Agriculture > Agriculture (General) > Farm machinery and farm engineering
Plant culture > Horticulture. Horticultural crops
Plant culture > Vegetables
Live Archive:18 Apr 2024 00:32
Last Modified:18 Apr 2024 01:11

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