Seasonal Prevalence of Occurrence of Japanese Beetle, Popillia japonica NEWMAN (Coleoptera: Scarabaeidae), on Nineteen Golf Courses in Japan

Abstract

In 1983, the search for seasonal prevalence of occurrence of Japanese beetle, Popillia japonica NEWMAN, was conducted by You-in trap cotaining lures on nineteen golf courses in Japan. A summary of the rerults is shown bellow. The areas with a very severe occurrence of adults were the golf courses in Tohoku, Shinshu and Tokai districts; however, Chugoku, Shikoku and Kyushu countrys were a light occurrence. Furthermore our experiments clearly demonstrated that the time of adult occurrence was closely connected with the mean temperture of each golf course. This trap could also utilize for the forecasting of adult occurrence and an index number of control with pesticides. Judging from number of catches of beetles per a trap during the summer season were above 3000, the use of many traps and chemical insecticides may be possible to decrease the beetle population.