Abstract
This study aimed to know the effect of different concentrations of cold water extract of Petroselinum crispum leaves on Culex pipiens instars and find the half lethal concentration (LC50). The results showed that the third instar of C. pipiens was more effective by cold water extract than first, second, and the fourth instar after 24 hours from exposure to different concentrations (250, 300, 350, 400) mg/l. Results appeared that the percentage of mortalities after 24 hours from exposure to cold water extracts were (37, 44, 67, 85) %, (26, 41, 67, 78) %, (42, 65, 77, 92) % and (16, 32, 52, 89) % with LC50 (300), (319), (267) and (333) mg/l for first, second, third, and fourth instar of C. pipiens respectively. Also, the results didn’t show a significant differentiation in a level of probability 0.05, but appeared positive correlation coefficient between the percentage of mortalities and the concentrations, and the negative correlation coefficient between the percentage of survival and the concentrations.
Highlights
Many studies try to find the natural compounds working as insecticides to many insects especially mosquitoes and didn’t cause death to many life forms and serve the economy
The egg rafts of C. pipiens mosquitoes have been collected from some pools of standing drainage water in the Province of Babylon and transformed to the laboratory in a plastic glass filled with water during the period from 1-7-2017 to 1-2-2018
The results didn’t show a significant differentiation but they appeared positive correlation coefficient where the percentage of mortalities increased with increasing concentration
Summary
Many studies try to find the natural compounds working as insecticides to many insects especially mosquitoes and didn’t cause death to many life forms and serve the economy. For that many researchers were digging to find these compounds in plants and in few cases in animals. Plant (Petroselinum crispum) is a member of the family of Umbelliferae (Apiaceae) which is the same family of celery, natively from Mediterranean region and cultivated in many various parts of the world [2]. It’s a herb that has compound leaves and clustered white flowers in groups with umbrella shape fruit compound. Parsley has aromatic odor and shining green leaves which have high chlorophyll and rich with vitamins such as vitamin C and minerals such as iodine, iron, and others [3]
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