Apple scab management in organic fruit orchards: Epidemiology, forecasting and disease control strategies

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Interest in organic fruit production, where management practices differ from those in conventional production, has expanded in recent years. Synthetic products are generally not allowed in organic fruit production; for example, in plant protection and nutrient supply, only natural products are permitted according to IFOAM standards. As a result, disease control in organic systems is less effective than in conventional or integrated production, and thus disease epidemics are likely to be more severe in such a system. This study describes the development of an apple scab management strategy. This includes epidemic features of the disease in organic orchards, a risk of scab epidemics initiated by sexual and asexual stages, possible control strategies against inoculum sources, efficacy and phytotoxicity of organically-approved fungicidal products, and appropriateness of various sanitation practices in organic fruit production. Also, the role of resistant vs. susceptible cultivars in disease epidemiology and management of organic orchards is considered. Based on the above examples encompassing mechanical, agro-technical, biological and chemical control options, a theoretical and practical decision-making approach and future trends in apple scab management are provided for organic orchards.

Original languageEnglish
Title of host publicationII International Organic Fruit Symposium
PublisherInternational Society for Horticultural Science
Number of pages12
ISBN (Print)9789066055964
Publication statusPublished - Jul 15 2013

Publication series

NameActa Horticulturae
ISSN (Print)0567-7572



  • Calcium-polysulphide
  • Copper
  • Disease warning
  • Malus ×domestica
  • Overwintered conidia
  • Pruning
  • Sustainable agriculture
  • Venturia inaequalis

ASJC Scopus subject areas

  • Horticulture

Cite this

Holb, I. J. (2013). Apple scab management in organic fruit orchards: Epidemiology, forecasting and disease control strategies. In II International Organic Fruit Symposium (pp. 223-234). (Acta Horticulturae; Vol. 1001). International Society for Horticultural Science.