تعيين اثر فاكتور كندكننده رشد بر شاخص هاي بيولوژيكي آنوفل استقسي و مقايسه دو روش حذف آن از محيط لاروي

Investigation the Effects of Growth Retardant Factor (GRF) on Biological Indexes of Anopheles Stephensi (Dip:Culicidae) and Investigation its Two Methods Elimination of Larval Environment

Mosquito larvae produce Growth Retardant Factor (GRF) during quantity at high larval density that its result is reduction of abundance and activity in mosquitoʹs larvae. In the study we eliminated of GRF larval environment Anopheles stephensi by two devised methods: Media replacement (method 1) and Common media (Method 2). Then we studied biological indexes transmit. In this experiment the biological indexes showed the following significant differences: decrease of larval and total mortality, increase of speed of larval development and survival rate with both GRF eliminating methods. While, increasing of sex ratio was only observed with second method (common media), the pupal mortality and body size indexes showed no significant differences. Therefore, with elimination GRF of larval environment, abundance and activity in mosquito larvae increased. Also, it was absorbed secondary method is more successful than first method for GRF elimination.