Use of acibenzolar-S-methyl and other novel products for the management of Aphelenchoides fragariae on ornamental plants in glasshouse and commercial conditions

Idowu J. Rotifa, Kenneth A. Evans*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Several chemical, biopesticide and elicitor treatments were evaluated on healthy plants inoculated with leaf and bud nematodes (Aphelenchoides fragariae). Aphelenchoides fragariae is a major threat to ornamental plant production worldwide, and its management poses a great challenge due to its wide host range of herbaceous, ferns and woody plants. Commercially available products containing spirotetramat, abamectin, azadirachtin and the elicitor of plant defences, acibenzolar-S-methyl (ASM), were assessed for their ability to reduce the multiplication of A. fragariae inoculated on two plant species: Anemone hupenhensis (Japanese anemone), and Buddleja davidii (Buddleja). Treatments were applied individually and in combination with ASM in a spray programme. All treatments consistently showed a significant reduction of nematode multiplication in treated plants compared to the control. Programmes of ASM with spirotetramat, abamectin or azadirachtin had significantly lower nematode populations on both plant species compared to the untreated plants. In Buddleja plants, a programme using spirotetramat + ASM had a 97% reduction of the A. fragariae population over the control (ROC) while ASM, spirotetramat, abamectin, azadirachtin, ASM + abamectin and ASM + azadirachtin caused between 78 and 94% ROC. On Japanese anemone, the highest nematode ROC (95%) was obtained with the spirotetramat + ASM programme, while other treatments (ASM, spirotetramat, abamectin, azadirachtin, ASM + abamectin and ASM + azadirachtin) had a range of 80–94% reduction of A. fragariae over the control. Management of plants infested by leaf and bud nematodes may prove challenging; however, all the treatments investigated demonstrated a significant reduction in nematode population in Buddleja and Japanese anemone, indicating that they have significant potential as effective alternatives to manage A. fragariae in ornamental plants. The potential of ASM alone or in programmes with other actives is discussed in relation to their use in the management of A. fragariae.

Original languageEnglish
Article number105467
JournalCrop Protection
Volume141
Early online date21 Nov 2020
DOIs
Publication statusPrint publication - Mar 2021

Keywords

  • Acibenzolar-S-Methyl
  • Anemone hupenhensis
  • Aphelenchoides fragariae
  • Buddleja davidii
  • Elicitors
  • Leaf and bud nematodes

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