الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
Housefly, Musca domestica, has been regarded as potential and often portant agent for transmission of several bacterial, parasitic and viral e aim of the study is two folds: . To monitor the housefly, Musca domestica, population abundance in different districts of Alexandria Govemorate throughout one year from January to December 2002. The obtained data will be helpful in planning and evaluating the housefly control programs. . To determine the susceptibility of housefly, Musca domestica, to different currently used insecticides by Ministry of Health and Population (namely malathion and azamethiphos against adults and chlorpyriphos against larvae). In addition to evaluate the effect of a botanical compound; neem oil against both adults and larvae as an alternative insecticide. . Determination of housefly, Musca domestica, population abundance in Alexandria Governorate: eobtained data can be summarized as follows: . The highest housefly abundance was observed in EI-Amreya and West Districts with mean grid count (75.0 :t 40.8 and 72.9 :i: 46.3), respectively. The highest housefly abundance in these districts may be due to the highest prevalence of garbage, while the lowest housefly abundance was observed in East and Borg El-Arab Districts with mean grid count (39.5:t 28.1) and (37.7:t 19.7) respectively. ’SIIIIf7ml1’y ana L.O nct U.) IU n ii. The order of housefly population abundance in different districts of Alexandria Governorate was as follows: El Amreya > West> El Montaza> Middle> El Gomrok > East> Borg El Arab. iii. Markets with highest housefly abundance were in Bab Omar Basha, Bacoos, El Wardian, El Medan, El Mandara and El Hanovil markets in Middle, East, West, El Gomrok, El Montaza and El Amreya districts, respectively with mean grid count (91.1 146.0), (54.8 128.3), (112.51 47.8), (58.8 128.4), (78.0 1 33.6) and (93.1 141.6) orderly. While the lowest housefly abundance was observed in El lbrahemia, Roshdy, Gheit El Enab, fish market, Cairo street and El Betash markets in Middle, East, West, El Gomrok, El Montaza and El Amreya districts, respectively with mean grid count (30.51 16.0), (12.8 1 10.6), (46.01 19.4), (38.2 1 18.4), (52.0124.6) and (47.5121.3), orderly. Garbage accumulations play an important role in housefly abundance in markets with the highest abundance. iv- As regards monthly and seasonal variations in housefly, Musca domestica, abundance, it was observed that housefly abundance was ~~’3.t\y affected by temperature fluctuation cycle, where there were two peaks observed in Spring and Autumn while there were two depressions in Summer and Winter. Months with the highest housefly abundance were May, September and October as the mean temperature ranged from 24 to 27°C, which favour the breeding of houseflies and their presence outdoors, while the lowest housefly abundance was observed in January, February and December as the mean temperature was below 15°C and in July and August as the mean temperature was above 27°C. v. There was a negative significant correlations between the housefly abundance and both shadow and wind as either shadow or wind increases the housefly abundance decreases and vice versa. l. Susceptibility of housefly, Musca domestica to the tested compounds: l.1. Traditional compounds: i. Susceptibility of adult houseflies to malathian using topical application method revealed that LD50 for laboratory strain was 0.0199 mg/fly while in case of field strain, it was 0.0363 mg/fly with slope values of 2.201 and 2.088, respectively. This indicates that the LD50 for field strain was only 1.8 times more than that of laboratory strain. ii. Susceptibility of adult housefly to azamethiphos using diet treatment method revealed that, LC50 for laboratory strain was 0.0281 while it was 0.0312 for field strain with slope values of 1.773 and 1.649, respectively. This indicates that LC50 for field strain was 1.1 times more than that of laboratory strain. iH. Susceptibility of the first instar larvae of housefly to chlorpyriphos using diet treatment method revealed that EC50 for laboratory strain was 3.47 ppm while for field strain, it was 3.50 ppm and their slope values were 1.926 and 1.656, respectively. This indicates that EC50 for field strain was only 1.01 times more than that of labotratory strain.