Abstract: Based on regular and circular analysis of the data collected from China during 1950's, lunar phase was found significantly correlated to the peak dates of light-trapped adults of the yellow rice borer, Tryporyza incertulas and rice stem borer Chilo suppressalis. The mean angles of peak dates of the yellow rice borer and rice stem borer corresponded to 0:45 on the 26 th day(P<0.001)and 23:53 on the 24th day(P<0.001)in lunar months, respectively, and were not significantly different between the two borer species(P>0.25). For the data pooled together, the mean angle of peak date of the two borer species corresponded to 11:36 on the 25th day.

Key words: Environment, Gluten, Wheat, Quality character