The effect of sodium bicarbonate alone or in combination with a reduced dose of tebuconazole on the control of apple scab


Ilhan K., Arslan Ü., Karabulut O. A.

CROP PROTECTION, vol.25, no.9, pp.963-967, 2006 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 9
  • Publication Date: 2006
  • Doi Number: 10.1016/j.cropro.2006.01.002
  • Journal Name: CROP PROTECTION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.963-967
  • Keywords: Venturia inaequalis, natural substances, alternative control, VENTURIA-INAEQUALIS, POSTHARVEST DISEASES, POWDERY MILDEW, ASCOSPORES, ORCHARDS, STORAGE, GRAPE, SALTS
  • Bursa Uludag University Affiliated: Yes

Abstract

Sodium bicarbonate (SBC) effectively inhibited spore germination and germ tube elongation of Venturia inaequalis in vitro. SBC at 0.5%, 1%, and 2% inhibited spore germination by 59.0%, 96.4%, and 100%, respectively. In two orchard experiments to investigate the efficacy of SBC alone or in combination with a reduced dose of tebuconazole in inhibiting apple scab, applications of 1% SBC to trees at 10-d intervals significantly reduced disease incidence and severity on leaves and fruit compared to the water-treated control. In the first experiment, by the last assessment, the 1% SBC treatment had reduced the disease incidence on leaves to 29.6% compared with 62.6% in the water-treated control. The efficacy of 1% SBC was comparable with that of the label dose of tebuconazole on leaves and fruit. Combining 1% SBC with a reduced dose (10% of label dose) of tebuconazole did not improve the efficacy of 1% SBC alone. Treatments of 2% SBC were phytotoxic to leaves, but 1% SBC was neither phytotoxic to leaves nor did it adversely affect quality parameters of harvested fruit. (c) 2006 Elsevier Ltd. All rights reserved.