Plant Disease Research
  • Year: 2011
  • Volume: 26
  • Issue: 2

In Vitro evaluation of fungicides and plant extracts against wilt and fruit rot pathogens of pomegranate

  • Author:
  • Kishore Khosla, S.S. Bhardwaj1
  • Total Page Count: 1
  • Page Number: 175 to 175

1Regional Horticultural Research Station, Bajaura-175 125

Dr. YS Parmar University of Horticulture and Forestry, Horticulture Research Station Seobagh, Neoli-175 138

National Symposium on Strategic Issues in Plant Pathological Research held at Department of Plant Pathology, CSK HP Krishi Vishvavidayalaya, Palampur on November 24–25, 2011

Abstract

Wilt disease of pomegranate caused by two pathogens namely Ceratocystis fimbriata and Fusarium oxysporum and fruit rot caused by Coniella granati are the most important and widely prevalent diseases of pomegranate. While the wilt pathogens out rightly killing the plants, the rot renders the produce unsalable thereby causing huge losses to the growers. In vitro evaluation of six fungicides at their standard doses and six freshly prepared plant extracts, known for their antifungal properties, at 10 per cent concentrations was done for the control of wilt pathogens whereas 12 fungicides in standard doses were evaluated against fruit rot pathogen. The experiments were repeated twice and colony diameter was recorded after 3,5,7,9 and 11 days for wilt pathogens and after 3, 5, 7, and 9 days of incubation at 25±1oC for fruit rot pathogen. The pooled data revealed 100 percent inhibition of wilt pathogens in case of carbendazim (0.05%), propiconazole (0.15%), benomyl (0.05%) and a combiproduct of captan + hexaconazole (0.1%). Individually captan (0.3%) was least effective against C. fimbriata, whereas both captan (0.3%) and hexaconazole (0.05%) were individually least effective against F. oxysporum. Amongst plant extracts, Basooti (Adhatoda vasica) extract was highly effective followed by drake (Melia azedarach) extract in suppressing the growth of C. fimbriata and walnut (Juglans regia) extract was highly effective against F. oxysporum. Vitex (V. negundo) extract was least effective against both the pathogens. In case of C. granati, the fruit rot pathogen, all the fungicides, except pyraclostrobin (0.025%) and copper based ones viz; Bordeaux mixture (0.8%) and copper oxychloride (0.3%) were found highly effective.