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Biostimulants Do Not Mitigate the Effects of Pasture Dieback in the Australian Wet Subtropics

Author

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  • Eric N. Mark

    (Faculty of Science and Engineering, Southern Cross University, 1 Military Rd, Lismore, NSW 2480, Australia)

  • Abraham J. Gibson

    (Faculty of Science and Engineering, Southern Cross University, 1 Military Rd, Lismore, NSW 2480, Australia)

  • Suzanne P. Boschma

    (New South Wales Department of Primary Industries and Regional Development, 4 Marsden Park Rd, Tamworth, NSW 2568, Australia)

  • Terry J. Rose

    (Faculty of Science and Engineering, Southern Cross University, 1 Military Rd, Lismore, NSW 2480, Australia)

Abstract

Pasture dieback is a disorder that causes the deterioration and death of susceptible tropical grass pastures in Eastern Australia. Previous reports from the Australian dry subtropics have suggested that biostimulants may be effective in mitigating the effects of pasture dieback. In this study, in two experiments (1 and 2), biostimulant products were applied to dieback-affected pastures, and pasture growth biomass and nutritional attributes (neutral detergent fiber and crude protein) were assessed 30 days after application compared to a control (water application only) treatment. In a third experiment (exp 3), biostimulant products were applied to a pasture prior to dieback incursion, and plant symptoms were assessed 16 days after application. In experiments 1 and 2, after 30 days, there was no significant difference in biomass production or nutritional attributes between any biostimulant treatments and the control, with mean biomass yields of 471 ± 61 kg ha −1 at site 1 and 1371 ± 78 kg ha −1 at site 2. In experiment 3, plant dieback symptoms progressed evenly across all plots, with no significant effect between treatments 16 days after treatment application. There was no evidence that the tested biostimulants were effective in preventing the spread of dieback or improving pasture recovery from dieback.

Suggested Citation

  • Eric N. Mark & Abraham J. Gibson & Suzanne P. Boschma & Terry J. Rose, 2025. "Biostimulants Do Not Mitigate the Effects of Pasture Dieback in the Australian Wet Subtropics," Sustainability, MDPI, vol. 17(7), pages 1-11, March.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:7:p:3013-:d:1622698
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    References listed on IDEAS

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    1. Maria M. Whitton & Xipeng Ren & Sung J. Yu & Andrew D. Irving & Tieneke Trotter & Yadav S. Bajagai & Dragana Stanley, 2022. "Sea Minerals Reduce Dysbiosis, Improve Pasture Productivity and Plant Morphometrics in Pasture Dieback Affected Soils," Sustainability, MDPI, vol. 14(22), pages 1-18, November.
    2. Ewa Mackiewicz-Walec & Marzenna Olszewska, 2023. "Biostimulants in the Production of Forage Grasses and Turfgrasses," Agriculture, MDPI, vol. 13(9), pages 1-33, September.
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