ABSTRACT
Even though essential oils from Piper aduncum (Piperaceae) have different biological activities, little is known about their application to agricultural areas. White mold is a plant disease caused by the phytopathogen Sclerotinia sclerotiorum, which needs to be controlled by alternative measures. This study aimed at evaluating the effect of essential oils from P. aduncum leaves (PL-EO) and inflorescences (PI-EO) on the mycelial growth of S. sclerotiorum. Essential oils from P. aduncum were obtained by hydrodistillation by a Clevenger-type apparatus while their chemical composition was analyzed by GC-MS and GC-FID. Piperitone (23.4 %), myristicin (12.4 %), terpinen-4-ol (12.3 %), ß-caryophyllene (7.2 %), α-humulene (6.9 %), germacrene-D (6.9 %) and dillapiol (6.3 %) were the main constituents found in oils from P. aduncum. The in vitro antifungal activity showed that PI-EO dose above 30 µL inhibited mycelial growth in 100 %, whereas PL-EO at 50 µL inhibited it in 98.74 %. This is the first report of the chemical composition of PI-EO and results suggest that the essential oils under evaluation have high potential to control the phytopathogenic fungus S. sclerotiorum.
Subject(s)
Antifungal Agents/pharmacology , Ascomycota/drug effects , Monoterpenes/analysis , Oils, Volatile/pharmacology , Piper/chemistry , Plant Leaves/chemistry , Plant Oils/pharmacology , Brazil , Cyclohexane Monoterpenes , Monoterpenes/pharmacology , Oils, Volatile/chemistry , Plant Oils/analysisABSTRACT
The anthelmintic activity of the extracts obtained from Luxemburgia octandra was evaluated naturally infected mice with Aspiculuris tetraptera and Vampirolepis nana. The leaves extracts were obtained through maceration and given to the animals by gavage in doses 8 and 20 mg/kg during three days. The ethanolic and ethyl acetate extracts presented significant increase of the V. nana elimination, but did not present the nematicide effect against A. tetraptera.
