تأثير بعض المستخلصات النباتية في هلاك يرقات بعوض Culex pipiens molestus Forskal

الملخص EN

eThis paper amid to study effect of eighteen watery and alcoholic (ethanolic) extracts belong to nine plant species of Artimisia sp ( Sheah in Arabic).

Citrus aurantium (Fash in Arabic), Cuminum cyminum L.

(Cumon in Arabic),Eucalyptus camaldulensis Dehnh(Caleptos in Arabic), Melia azedarach L(Sebahbah in Arabic).

Myrtus communis L.

(Yas in Arabic), Pluchea tomentosa DC.

(Kheais in Arabic),Pulicaria revularia (Shewaser in Arabic)and Ruta chalepensis L(Sethab in Arabic).

on the the 4th instar larvae of Culex pipiens molestus Forskål have been evaluated, for all studied plants, the secondary compounds were identified The results showed that the watery extract of M.

communis had the highest effect, the 50 % concentration (LC50) for the larvae was 0.6 × 104 part per million (ppm) after 48 hours of treatment followed by watery extract of R.chalepensis and E.

camaldulensis with LC50 2 × 104, 2.2 × 104ppm respectively after 48 hours of treatment.

While alcoholic extract of C.

cyaminum showed the highest effect with LC50 0.4 × 104ppm followed by alcoholic extract of R.

chalepensis and M.

azedarach with LC50 1.2 × 104, 1.3 × 104ppm respectively after 48 hours of treatment.