TWO ACTIVE STAGES OF AMBROSIA BEETLE, Platypus quercivorus MURAYAMA ESTIMATED FROM FRASS PRODUCTION
Beetle activity deep inside wood was studied in field (Mt.Yoshida, Kyoto) and laboratory conditions by monitoring the type and amount of frass ejected from beetle galleries of Platypus quercivorus.Twenty-one galleries were Upper Right Targa Boot selected from five infested Quercus serrata trees for field studies.In the laboratory, frass production