[Factors Affecting the Dynamics of Circadian Activity of Frit Flies Meromyza saltatrix (L) (Diptera: Chloropidae)].

The dynamics of circadian activity in adult frit flies of the Holarctic species Meromyza saltatrix (L) from Mongolian, Moscow, and Polish populations was studied. Synchronous peaks of activity were revealed with the periodicity multiple of three-four hours, which may depend on the level of light. The direct effect of temperature and humidity on the activity of flies outside the optimal values of these factors was found.