Characterization of Fusarium sambucinum isolates associated with potato dry rot and evaluation of cultivar susceptibility and fungicides
Küçük Resim Yok
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
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Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Potato dry rot disease (Fusarium spp.) is one of the most important fungal storage rots on potato tubers after harvesting.The aims of this study were to identify the Fusarium species that cause dry rot in potato storages, evaluate the most virulent Fusariumspecies in vitro and in vivo for fungicide sensitivity and determine the susceptibility of the cultivars. In this context, as a result of surveyscarried out in potato storages of Ödemiş and Torbalı counties in İzmir province in 2015–2016; Fusarium species obtained from diseasedpotato tubers were identified as Fusarium sambucinum, F. oxysporum, F. avenaceum and F. equiseti, using morphological and molecularmethods. The most virulent species was determined according to the pathogenicity tests. To determine the susceptibility to disease, 13potato cultivars, commonly stored in the region throughout the working period, were tested against the most virulent Fusarium species.The pathogenicity tests showed variation between the rank order of susceptibility of the cultivars to the most virulent pathogen. Fungicidesensitivity tests have been conducted with the most susceptible among these cultivars. There are not any plant protection productslicensed against this disease in Turkey. On fungicide sensitivity tests, fludioxonil, flutolanil, thiophanate methyl, imazalil, fludioxonil +sedaxane, fluxapyroxad and tolclophos–methyl + thiram efficacy were investigated on the mycelial growth of F. sambucinum. In vitroassays; fludioxonil, fludioxonil + sedaxane and imazalil were the most effective fungicides preventing mycelial growth of the pathogen.In addition to chemicals that are effective in vitro tests, efficacy of Bacillus subtilis QST 713 strain 1.34%, Pseudomonas fluorescens strainPf1 1.5% and 42% carboxylic acid were also evaluated. In vivo tests were conducted with Russet Burbank, Lady Olympia, Granolacultivars and fungicides were applied in two different methods including before and after inoculation. Results of this study indicated thatthe treatments with fludioxonil + sedaxane had the highest efficacy and treatments before inoculation was more effective.
Açıklama
Anahtar Kelimeler
Dry rot, Fusarium sambucinum, potato, fludioxonil, Fusarium spp.
Kaynak
Turkish Journal of Agriculture and Forestry
WoS Q Değeri
Scopus Q Değeri
Cilt
45
Sayı
2
