Fruit drop in two kiwifruit varieties and the use of two <i>Bacillus</i>-based biofungicides

Authors

  • Seona Casonato Lincoln University

DOI:

https://doi.org/10.30843/nzpp.2019.72.288

Keywords:

kiwifruit, fruit drop, biofungicides, Bacillus

Abstract

Recently, fruit drop in two green varieties of kiwifruit (Actinidia deliciosa; VarA and VarB) has increased towards the harvest date. The efficacy of two biofungicides, applied post-flowering, to ameliorate the effects of early fruit drop in VarA and VarB during the 2017–18 growing season was tested. Treatments were applied to a single bay, with buffer bays and rows adjacent. Treatments were two different Bacillus-based biofungicide products; Serenade® Max (a.i. B. subtilis QST713 strain) and Triple-X® (a.i. B. amyloliquefaciens BS 1b). There was an untreated control. All fruits in the canopy, within the treated bay, were counted and recorded at 4-weekly intervals, over 5 months until harvest. At the VarA site, there was no statistical difference (P>0.1) in the percentage of fruit drop between the control (7%), Triple-X® (5%) and Serenade® Max (10%) treated vines. At the VarB site, fruit drop differed statistically (P<0.1) between Triple-X® treated vines (5%) and the control (10.5%), with Serenade® Max treated vines (6.5%) having intermediate fruit drop. The use of Triple-X® may be an option to assist with reducing fruit drop in kiwifruit.

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Published

2019-07-27

How to Cite

Casonato, Seona. “Fruit Drop in Two Kiwifruit Varieties and the Use of Two &lt;i&gt;Bacillus&lt;/i&Gt;-Based Biofungicides”. New Zealand Plant Protection 72 (July 27, 2019): 271–277. Accessed December 8, 2022. https://journal.nzpps.org/index.php/nzpp/article/view/288.

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Papers