Effect of some essential oils on Rhizoctonia solani Kuhn infecting flue - cured virginia tobacco

摘要

The effect of 12 essential oils viz , pepper oil ( Piper nigrum L.), nutmeg oil ( Myristica fragrans Houtt.), turmeric oil ( Curcuma longa L.), capsicum oil ( Capsicum annum L.), coriander oil ( Coriandrum sativum L.), fennel oil (Sweet) (( Ocimum gratissimum L.), fennel oil (Bitter) ( Foeniculum vulgare ssp piperitum. Mill.), clove oil (Syzygium aromaticum L.), tulsi oil ( Ocimum sanctum L.), cinnamon oil ( Cinnamomum zeylanicum Breyne.), mustard oil ( Brassica juncea L.) and eucalyptus oil ( Eucalyptus citriodora Hook) were tested for fungicidal properties against Rhizoctonia solani - the causal agent of sore shin disease of tobacco by poisoned food technique. The minimum inhibitory concentration varied between 500 - 2000 ppm. Essential oil of cinnamon was found most effective, as it recorded complete inhibition of the pathogen at 500 ppm. Clove oil showed mycelial inhibition at 1000 ppm. Fennel and nutmeg oil were effective at 2000 ppm