CUMULATIVE AND NON-CUMULATIVE EFFECTS OF SOME ALGAL AND PLANT EXTRACTS ON THE LARVAL STAGES OF CULEX QUINQUEFASCIATUS MOSQUITOES COMPARED TO SOME INSECTICIDES

Abstract

The aqueous extract of Chara vulgaris algae and the leaves of the Myrtus communis plant was used and the calculation of the cumulative and non-cumulative effect of the effectiveness of these extracts was compared with the chemical insecticide Alpha-cypermethrin. The results showed the superiority of the insecticide over the algae and plant extracts. Myrtus, whether the effect is cumulative or non-cumulative, as results showed that the most affected phases were the first larval stage and for all treatments. While the fourth larval stage was less affected and the results showed phenotypic abnormalities in treated larvae with an increase in the number of days of the larval stage. The study showed the presence of compounds in the extract of leaves of Elias and Chara that included effective compounds including phenols, alkaloids, coumarines, clicosides, phenols, flavonoids, oils and tannins.