الفهرس 
Toxicological effect of insecticides against fruit fliesOnly 14 pages are availabe for public view
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Abstract
The thesis aimed to throw some light on the
toxicological, biochemical and histopathological effect of
Malathion (organophosphorus insecticide) and Spinosad
(biopesticide derived from metabolites of the actinomycete
bacterium (Saccharopoly spora spinosa) on the peach fruit
fly in laboratory.
The obtained results are summarized as follows:
I-Insecticidal effect of Malathion and Spinosad on the
peach fruit fly, B. zonata (Saunders).
Data indicated that Malathion and Spinosad proved
high insecticidal activities on B. zonata. Spinosad had more
potency than Malathion.
Malathion and Spinosad showed moderate
insecticidal effect on pupal stage with considerable number
of obvious malformations.
The two evaluated compounds had high insecticidal
activities on adult than pupae. This indicated that pupal
stage was more tolerant to insecticides than adult stage.
Based on LC50 values results indicated that females
were more resistant to the two insecticides than males.
Also, Malathion and Spinosad were more effective by
using residual thin film than feeding method.
The resistance ratio (RR) to Spinosad in field
population higher than in case of Malathion compared with
the lab strain. However, in comparing LC50 of the fifth
generation of resistant strains with that of parent insects produced a higher RR in Malathion than Spinosad. This
indicates that it is likely that peach fruit flies with
resistance to Malathion also have higher potential to
develop resistance to Spinosad.