Sensitivity of <i>Neonectria ditissima</i> to carbendazim fungicide in New Zealand

Authors

  • M. Walter
  • O.D. Stevenson
  • N.T. Amponsah
  • R.W.A. Scheper
  • A.R.G. McLachlan

DOI:

https://doi.org/10.30843/nzpp.2014.67.5743

Abstract

Carbendazim can be used by New Zealand pipfruit growers for control of European canker caused by Neonectria ditissima A total of 162 N ditissima isolates were tested for carbendazim sensitivity using a mycelial growth assay on amended malt extract agar plates at concentrations from 02 mg/litre Generally isolates ceased growth at 2 mg/ litre carbendazim with 65 isolates ceasing growth at 1 mg/litre The EC50 values calculated for 19 isolates ranged from 051 to 138 mg/litre The data suggested that isolates ranged from sensitive (EC50<1 mg/litre) to having intermediate resistance (EC50110 mg/litre carbendazim) based on comparison with other agarbased studies Resistance in other fungi has been reported at carbendazim concentrations of >100 mg/litre The isolates tested were mostly sensitive to carbendazim but some showed a shift towards intermediate resistance Mycelial growth tests at 2 mg/litre may be a useful tool to screen single spore isolates quickly for potential carbendazim resistance

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Published

2014-01-08

How to Cite

Walter, M., O.D. Stevenson, N.T. Amponsah, R.W.A. Scheper, and A.R.G. McLachlan. “Sensitivity of &lt;i&gt;Neonectria ditissima&lt;/i&gt; To Carbendazim Fungicide in New Zealand”. New Zealand Plant Protection 67 (January 8, 2014): 133–138. Accessed February 28, 2021. https://journal.nzpps.org/index.php/nzpp/article/view/5743.

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