Larvicidal potency of some extracts from wild Egyptian plants to Culex pipiens

Out of fifty Egyptian plant extracts tested against the 4th larval instar of Culex pipiens, seven extracts possessed insecticidal activity. Extracts of Lyciums shawii was the most toxic [LC50, 45.76 mg/l]. Other active extracts were these of Ononis vaginalis [58.2 mg/l], Ranunculus sceleratus [91.11 mg/l], Ammi majus [109.5 mg/l], Salvia lanigera and Moricandia nitens [126.9 mg/l], and Alkanna tinctoria [138.5 mg/l]. The rest of the plant extracts were less or non-active at 100 mg/l