Life History Parameters of the Tomato Red Spider Mite Tetranychus evansi (Acari:Tetranychidae), Collected in Syria, on Two Solanaceous Plants

Document Type : Original research articles

Authors

Department of Plant Protection, Faculty of Agriculture, Tishreen University Lattakia, Syria.

Abstract

The  effect of  the  two  host  plants Solanum  lycopersicum  and  Solanum  nigrum  belonging  to  the  family  Solanaceae  onbiological  (survival  and duration  of  developmental  stages,  fecundity  and longevity  of females  and  sex  ratio)  and demographic  parameters (R0,  G, rm  andλ ) of Tetranychus  evansi  was studied  in  the  laboratory  under  controlled conditions:  25°C+ 0.5°C,  75  + 10%  RH and  16L:  8D.  The rise of intrinsic rate of  increase  (rm = 0.242  day-1)  of  the mite population,  and time  needed  to  duplicate population numbers  (Dt =  2.11  day) on S. nigrum compared  to S. lycopersicum  (rm=  0.215  day-t,  Dt:20.23  day)  refers  to  S. nigrum  as  a favorable  host to  T.  evansi.

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