CULTIVATION METHOD OF PLANT, AND ITCHING INHIBITOR

摘要

PROBLEM TO BE SOLVED: To provide a production method of impatiens textori leaves under artificial environment, to provide an extract of impatiens textori leaves which is obtained by the method, and to provide an itching inhibitor containing the extract.SOLUTION: There is provided a production method of impatiens textori leaves in which cultivation of impatiens textori is performed under artificial environment, the cultivation including (a) a step of growing impatiens textori by performing hydroponics while using nutritious liquid as hydroponics liquid and (b) a step of harvesting grown impatiens textori, and the cultivation further includes a step of exchanging hydroponics liquid from nutritious liquid to water prior to harvesting of leaves after the step (a) and performing hydroponics for at least two days as desired. There are also provided an extract of leaves obtained by the method, and an itching inhibitor containing the extract.