Bay leaves 就是桂葉或月桂葉　要整片的桂葉放在小強常出沒的地方

蟑螂喜歡在有水有食物的地方　要特別注意



http://bigpeace.wordpress.com/2005/06/01/humane-ways-to-control-insects/

Try bay leaves. If cockroaches have moved in, simply place whole bay leaves in several locations around the infested rooms, including inside kitchen cabinets. Bay leaves smell like dirty socks to cockroaches.