Bacillus thuringiensis var. israelensis as a microbial control agent against adult and immature stages of the sandfly, Phlebotomus papatasi under laboratory conditions.
The laboratory treatment of adult and immature stages of Phlebotomus papatasi by the bacterial insecticide, Bacillus thurnigiensis var. israelensis was carried out. Different concentrations of B.t.i. mixed with fructose and glucose were assayed against the adult sandfly, while the immature stages were treated by offering larval diet contaminated by B.t.i. in different concentrations diluted by distilled water. B.t.i. could induce mortality to half of the larval and pupal population at 0.26 x 10(-5) g/L. The median lethal doses of adults which were fed on contaminated surgery diet with serial dilutions of B.t.i. were 1.3 x 10(-2) g/L with fructose, and 3 x 10(-2) g/L with glucose after 48 and 72 hrs. The longevity period of larvae and pupae fed on contaminated larval diet showed negative correlation with bacterial concentrations except for highly concentrations. The bacterial control of the sandfly, Ph. papatasi could be recommended particularly as adulticide agent.
Wahba
M M
MM
Department of Biology, Faculty of Education, Suez Canal University, El-Arish, Egypt.
Labib
I M
IM
el Hamshary
E M
EM
D000818:Animals; D001413:Bacillus thuringiensis / Q000502:physiology*; D010572:Pest Control, Biological; D010691:Phlebotomus / Q000254:growth & development / Q000382:microbiology