Antifungal effect of essential oil and different extracts obtained from Nepeta meyeri on Botrytis cinerea

The study concerns the antifungal effect of aqueous and methanolic extracts, essential oil obtained from aerial parts Nepeta meyeri Benth. on Botrytis cinerea Pers. fungus has been isolated infected plants common grape Karaerik (Vitis vinifera L.) cultivating in vineyards Üzümlü district, Erzincan (Turkey), was cultured potato dextrose agar medium Petri dishes after identification by 18S rRNA gene-based PCR assay. concentrations extracts N. were 2%, 5% 10% (w/v) for extract (AE); 500, 1000 1500 ppm (v/v) (ME), 0.6, 0.8 1 µL (EO). After treatments, mycelial growth, spore germination, germ tube elongation determined. Sterile distilled water at same ratios used control treatment. Thirty-six different compounds identified EO GC/MS. highest activity registered meyeri. inhibition rates µL/Petri 80.72%, 18%, 38.15% germination elongation, respectively. However, AE ME showed diverse effects studied parameters B. cinerea. It is suggested that favourable concentration can contribute to prevention infection (grey mould) which causes disease vineyards.