استقصاء تأثير المجال المغناطيسي والماء الممغنط في بعض الصفات الحياتية لبعوض Culex molestus Diptera: Culicidae

Investigation of the effect of magnetic field and magnetic water in some biological aspects of mosquito (Culex molestus Diptera: Culicidae)

SUMMARY
A magnetic flux indicator was used to study the response of the Culex molestus Forskal mosquito larval stages (second and fourth) and pupal period to the two parameters of time and mating (at 750 gauss and continuous exposure to both or one sex). This has shown the following: –
The magnetic treatment with classifiers up to 750 gauss (the greatest response) reduced adult ages in the second and fourth larval stages. The flux density did not affect the life rate, but continuous exposure based on the point of overlap with the flux treatment variables did. At a rate of 5.1 days/female, male for the second larval stage, compared to 16.4 days in the control, and at a rate of 13.7 days for the fourth larval stage, compared to 17 days in the control.
The treated pupae grew and developed normally, attaining adulthood at a rate of (21.9 days/female, 15.95 days/male) while the control virgins grew older at 15.95 days/female. The difference in magnetic flux, time of exposure, and type of mating ruled out the effect of the treatment of the fourth larval instar and the pupal in inhibiting the reproductive ability of the emerging adults when comparing the rate of their laying in the comparison treatment.
In contrast, continuous exposure to the larvae of the second age reinforced this. Males and females of both sexes developed from treated larvae and females. With untreated (natural) men, it reached a rate of (1.03, 1.1 egg rafts/female) compared to (2.8 egg rafts/female) in control, with no effect of treating males on the number of boats laying eggs and identical outcomes to treated males.
In the control treatment, a simulation of the treated and referred instar’s short-lived emergence rate showed the importance of the exposure stage and duration on the mating type. The chance of exposure to the magnetic flux index of 750 gauss linked with the mating of men and females treated in their second larval role is highest during the second larval stage and during continuous exposure or an hour in the morning and evening. This applies to second-phase female therapy and adult mating, egg production reached (107.3, 108.4 eggs/raft) for one mating type, (115, 3 eggs/raft) according to different mating versus (132.9 eggs/boat) in the control at exposure (AM+PM) as well as (100.6, 101.5 eggs/raft), 106 eggs/raft) respectively versus (133.1 eggs /raft) in control at continuous exposure when compared to control at exposure (AM+PM) and untreated males of the same phase, where the difference was more pronounced with regard to the number of eggs/raft) in the comparison. In a different way, it showed how flexible female egg production is. The result was different based on how many eggs were on each raft.
The overflow density mentioned above and the presence of adults of the fourth larval age treated with different time and type of mating along with adults treated for the pupal role and for the same density and continuous exposure show the importance of the magnetic flux index according to the overlap with type of mating and significant differences within the same density for different mating or for the type of one mating in the rate of number of eggs laid.
The remarkable decrease was supported by the average percentage of hatching eggs, indicating the sensitivity of continuous exposure to the second-stage larvae, according to the two magnetic flux indicators of 500 and 750 gauss, and in different mating cases, at rates of 71.6 and 75.2% compared to the control at 81.1%, knowing that the exposure made the hatching eggs more sensitive to the magnetic field.
The second larval age of the magnetic flux classifiers within one mating case was comparable to the number of hatched eggs in the control at 79.3% compared to 81.1%, highlighting the importance of the stage and then the duration of exposure within the single classifier for the density of the flood and the various mating cases. The percentage of polarized hatchlings in the variable magnetic flux of 250 gauss and for the same exposure period mentioned above, as well as the exposure (AM, PM, AM + PM) according to all classifiers of the type of mating and the different magnetic flux, showed adaptability, with rates of 94.9% at the continuous exposure and 250 G, while it reached 90.5%, 91.35%, and 95.1% at the other times.

The range indicated the probability of extension depending on the proportion of male to female eggs that hatched, with the greatest impact seen in males.
Very similar hatching rates of 79, 79,3% during continuous exposure, 92.1, 91.5 when exposing (AM), 92.6, 92.5 when exposing (PM), and 97.8, 96.7% (AM + PM) were demonstrated for the two sex combinations of treated and untreated males and females.
The average number of fertilized eggs laid by treated females mating with untreated males was lower than when they did so with treated men or treated females.
Key words: magnetic flux, time, Culex pipiens f. molestus (Culicidae), and autogeny, %Egg hatchability and Sterility Index, longevity