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<p>Almond trunk diseases can cause a significant decline in orchard productivity and profitability through limb and tree death. Several pathogens have been implicated in the trunk disease complex in Australia, with <i>Diplodia seriata</i> reported as most prominent. These pathogens can infect through wounds, such as those created during pruning or other mechanical processes. Fungicide and biological products are registered for managing these diseases in California, but there is only one wound dressing product registered for trunk diseases in Australia. In three in vitro experiments, 21 treatments, including fungicides and biological controls, were evaluated for the inhibition of mycelial growth of five trunk disease pathogens: <i>Colletotrichum acutatum</i><i>, </i><i>Collophora rubra</i><i>, </i><i>Diplodia seriata</i><i>, </i><i>Eutypa lata</i> and <i>Pleurostoma richardsiae</i>. Most treatments reduced mycelial growth of most pathogens by 50–100%. Based on in vitro trial results, nine wound treatments were selected for evaluation in two field trials against <i>D. seriata</i>, with four treatments; fluopyram &amp; tebuconazole, azoxystrobin &amp; tebuconazole, fluazinam and pyraclostrobin &amp; fluxapyroxad, providing 41–87% disease control<i>.</i></p>

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Evaluation of fungicides and biological controls as pruning wound protectants for trunk disease pathogens of almond in Australia

  • 期刊论文

  • 发表日期：

    2026年6月29日

查看全文
  • Brittany J. Oswald,
  • Suzanne F. McKay,
  • Tarita Furlan,
  • Mark R. Sosnowski

摘要

Almond trunk diseases can cause a significant decline in orchard productivity and profitability through limb and tree death. Several pathogens have been implicated in the trunk disease complex in Australia, with Diplodia seriata reported as most prominent. These pathogens can infect through wounds, such as those created during pruning or other mechanical processes. Fungicide and biological products are registered for managing these diseases in California, but there is only one wound dressing product registered for trunk diseases in Australia. In three in vitro experiments, 21 treatments, including fungicides and biological controls, were evaluated for the inhibition of mycelial growth of five trunk disease pathogens: Colletotrichum acutatum, Collophora rubra, Diplodia seriata, Eutypa lata and Pleurostoma richardsiae. Most treatments reduced mycelial growth of most pathogens by 50–100%. Based on in vitro trial results, nine wound treatments were selected for evaluation in two field trials against D. seriata, with four treatments; fluopyram & tebuconazole, azoxystrobin & tebuconazole, fluazinam and pyraclostrobin & fluxapyroxad, providing 41–87% disease control.