Biological control of black scurf on potato under organic management

L. Tsror*, R. Barak, B. Sneh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Field experiments showed that Trichoderma harzianum, nonpathogenic Rhizoctonia (np-R) and cattle manure compost amendment (CMC-H) applied in furrow could reduce black scurf incidence in organically grown potatoes. Incorporation of T. harzianum applied to the soil surface had a relatively small effect compared to the in-furrow treatment. Application of two isolates of nonpathogenicbinucleate Rhizoctonia (RS 521 and RU 56-8-AG-P) also significantly reduced the incidence of infected tubers in field experiments. Although treatments significantly reduced disease incidence and severity, total yield was unaffected. For the first time the efficiency of T. harzianum and np-R in reducing the incidence of black scurf on daughter tubers was demonstrated using naturally infested soil and contaminated seed tubers.

Original languageEnglish
Pages (from-to)145-150
Number of pages6
JournalCrop Protection
Issue number2
StatePublished - 2001


  • Cattle manure compost
  • Disease incidence
  • Disease severity index
  • Nonpathogenic Rhizoctonia
  • Rhizoctonia solani
  • Scerotia
  • Trichoderma harzianum


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