تأثير مستخلصات نباتي النعناع Mentha spicata L. و اليوكالبتوسEucalyptus microtheca F.Muell. في بعض جوانب الأداء الحياتي لبعوض Culex molestus Forskal (1775) Diptera : Culicidae ) )

Effect of plant extracts for Mentha spicata L. and Eucalyptus microtheca F.Muell. on some biological aspects of Culex molestus Forskal(1775)(Diptera:Culicidae)

Abstract
The effects of aqueous extract and chloroform of roots , stems and leaves of plant Mentha spicata and Eucalyptus microtheca to concentrations use(1,5 and 10)mg/ml of aqueous extract and concentrations uses (0.25,0.5 and 1)mg/ml of chloroform extract on some biological aspects of mosquito Culex molestus of treatment fourth- instar larvae of the insect.
The results of the study showed that the root extract cold and boiled aqueous and chloroform of mint plant , led to high percentage of inhibition emergence that value of LC50 (4.216 , 6.309 and 0.28 ) mg/ml respectively , and with regard to the impact on mortality of fourth-instar larvae and pupae the results prove that the use of concentration(10,10 and 1) mg/ml increase the percentage of mortality to( 97,80 and 100) % respectively compared with 16.33% in the control treatment . the results showed that the extract of roots mint plant decrease in the number of eggs produced for the mature individuals , which were treated in the fourth-instar larvae by concentration( 1) mg/ml if the average number of eggs produced decreased( 26.52, 21.5 and 0 ) egg / female respectively compared with 31.98 egg / raft in the control treatment .if the rate of the age mature individuals , the results showed that the extracts effective as the rate of male and female age has changes to (3.4,11.11;5.6,13 .5;5,7) day respectively compared with (7.3,9.4) day in control treatment . in addition , the rate of growth of immature stages in the fourth-instar larvae and pupae.
The results of the study showed that stem extract to high percentage of inhibition emergence that value of LC50 ( 1.318, 0.891 and 0.631 ) mg/ ml respectively of aqueous and chloroform extracts , and with regard to the impact on mortality of immature stages insect , the results prove that the use of concentration( 10,10 and 1) mg / ml (100 , 100 and 87)% respectively compared with 28% on the control treatment. The results showed that the extract of stems decrease in the number of eggs produced for the mature individuals , which were treated in the fourth-instar larvae by concentration 1 mg/ml if the average number of eggs produced decreased (52,37 and 0 ) egg/ raft respectively compared with 34.40 egg/ female on control treatment. if the rate of the age mature individuals , the results showed that the extracts effective as the rate of male and female age has changes to (5.3,18.25;11,14.5;3.2,8) day respectively compared with (6.7,10.46)day on control treatment. In addition , the rate of growth of immature stages in the fourth-instar larvae and pupae.
The results of the study showed that leaves extract cold and boiled aqueous and chloroform to high percentage of inhibition emergence that value of LC50 (0.6,1.445 and 0.209) mg/ml respectively ,and with regard to the impact on mortality of immature stages insect,the results prove that the use of concentration (10,10 and 1) mg/ml (100)% respectively compared with 28.66% on control treatment . the results showed that the extracts of leaves decrease in the number of eggs produced for the mature individuals , which were treated in the fourth-instar larvae by concentration 1mg/ml if the average number of eggs produced decreased(80,0,0)egg/ raft respectively compared with (42.18) egg/ female on control treatment .if the rate of the age mature individuals , the results showed that the extracts effective as the rate of male and female age has changes to (6,8;10,0 ;2.6,8)day respectively compared with (7.9,10)day on control treatment . in addition ,the rate of growth of immature stages in the fourth-instar larvae and pupae.

The results of the study showed that the roots extract of cold and boiled aqueous and chloroform of Eucalptyus plant to high percentage of inhibition emergence that value of LC50( 0.5, 0.5 and 0.12) mg/ml respectively,and with regard to the impact on mortality of fourth-instar larvae and pupae the results prove that the use of concentration(10,10 and1)mg/ml(100)% respectively compared with 22% on control treatment .the results showed that the extracts of roots non-egg production from mature individual .if the rate of age mature individual ,the results showed that the extract effective as the rate of male and female age has changes to (0,0;0,0;21,0)day respectively compared with (9.33,13)day in the control treatment .in addition , the rate of growth of immature stages in the fourth-instar larvae and pupae.
The results of the study showed that the stems extract of cold and boiled aqueous and chloroform to high percentage of inhibition emergence that the value of LC50(0.53,0.4 and 0.33)mg/ml respectively , and with regard to the impact on mortality of immature stages insect .the results prove that the use of concentration(10,10 and 1) mg/ml(100) % respectively compared with (28.55)% in the control treatment . the results showed that the extracts of stems non-eggs production from mature individual .if the rate of age mature individual ,the results showed that the extracts effective as the rate of male and female age has changes to(-,12;8,- ;4,15)day respectively compared with (13,21.33)day in control treatment . in addition , the rate of growth of immature stages in the fourth –instar larvae and pupae.
The results of the study showed that the of leaves extract cold and boiled aqueous and chloroform to high percentage of inhibition emergence that the value of LC50(0.8,0.8and 0.38) mg/ml respectively , and with regard to the impact on mortality of immature stages insect .the results prove that the use of concentration (10,10 and 1) mg/ml (100)% respectively compared with 26.66% in control treatment. the results showed that the extracts of leaves non-eggs production from mature individual , if the rate of age mature individual , the results showed that the extracts effective as the rate of male and female age has changes to (4,11;3,4;6,10)day respectively compared(8.41,14.58)day in control treatment. In addition , the rate of growth of immature stages in the fourth-instar larvae and pupae.