title: Comparative delta-endotoxins of Bacillus thuringiensis against mosquito vectors (Aedes aegypti and Culex pipiens).
abstract: Pure crystals of seven Bacillus thuringiensis field isolates from the Lower Silesia region (Poland) were tested against larvae of Aedes aegypti L. and Culex pipiens L. (Culicidae, Diptera). The crystals of OpQ3 phylloplane isolate (belonging to the first biochemical type of B. thuringiensis subsp. japonensis, yoso, jinghongiensis) killed from 68 +/- 7% to 84 +/- 7% of the fourth instar larvae of A. aegypti. The crystals of two other strains (KpF3 and KpC1) of this group caused mortality between 3 +/- 2% and 70 +/- 7%. The LC50 ranged from 3.2 +/- 0.4 to 34.1 +/- 4.8 microg/ml. The effect of B. thulringiensis wratislaviensis H-47 crystals was the lowest with larval mortality from 0% to 17 +/- 3%. No significant (0%-37 +/- 6%) effect of B. thuringiensis crystals on the larvae of C. pipiens was observed. Our results show that the delta-endotoxins of B. thuringiensis act very specifically.
authors.affiliation: Departament of Parasitology, Institute of Genetics and Microbiology, University of Wrocław, 63 Przybyszewski Street, 51-148 Wrocław, Poland.
authors.forename: Elzbieta
authors.initials: E
authors.lastname: Lonc
authors.forename: Jolanta
authors.initials: J
authors.lastname: Kucińska
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Rydzanicz
mesh_terms: D000330:Aedes; D000818:Animals; D001413:Bacillus thuringiensis / Q000737:chemistry / Q000378:metabolism*; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000302:isolation & purification; D001427:Bacterial Toxins / Q000302:isolation & purification; D003465:Culex; D004731:Endotoxins / Q000302:isolation & purification; D006460:Hemolysin Proteins; D007306:Insecticides; D009032:Mosquito Control / Q000379:methods*
chemical_list: D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004731:Endotoxins; D006460:Hemolysin Proteins; D007306:Insecticides; C030956:insecticidal crystal protein, Bacillus Thuringiensis