The studies on the flight behaviour of rice water weevil(RWW), Lissorhoptrus oryzophilus Kuschel,in the double rice cropping area of Zhejiang Province from 1994 to 1996 were presented.As one of the symptoms in their diapause syndrome,the weevils displayed unique characteristics of their flight behaviour:a long time limbering up excercise at the tip of grass (or rice) leaves before take off,but a low exodus rate(ca.one third);there was no trivial flight in their life history because their flight muscles ...