# グアバの葉から抽出されたオイルがゴキブリに対する忌避活性を有する

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Recently, several studies on the antifungal action of the essential oils have been reported. Notably, the essential oil extracted from the leaves of Psidium guajava, popularly known as guava tree, belonging to the family Myrtaceae. This species grows in tropical and subtropical climates, being well adapted to a variety of soil types. It has medicinal properties, its bark has been employed in the treatment of diarrhea in children and leaves are used for relieving cough, pulmonary disorders, wounds, and ulcers. Further, its fruit is used as a tonic and an anthelmintic agent (BISWAS et al., 2013).

Results from the literatures attest that the oil extracted from the guava leaves has antibacterial activity against Staphylococcus aureus and Salmonella anatum and repellent activity against cockroaches. Further, it has moderate repellent activity against the mosquito Anopheles stephensi Liston, and anti-inflammatory and antifungal activities against Colletotrichum gloeosporioides (THAVARA et al., 2007; RAJKUMAR; JEBANESAN, 2007; GONÇALVES et al., 2008; SILVA et al., 2009).