Toxicity of Bacillus thuringiensis to laboratory populations of the olive fruit fly (Dacus oleae)

Abstract

A survey of Bacillus thuringiensis recovered from the environments of olive groves in Greece was carried out. Of 80 soil samples, 24 were found to contain B. thuringiensis with parasporal crystal inclusions; these were tested for toxicity against the olive fruit fly (Dacus okae). Mortality levels of larvae caused by the different isolates varied from 7 to 87%. Higher levels of mortality were observed if a mixture of relatively pure crystals and spores was used compared with the mortality resulting from either fraction alone. We were able to show that the toxicity of the most active isolate is likely to be specific for D. oleae.

Molecular characterization of local Bacillus thuringiensis strains recovered from Northern Jordan

“…Most of the diptera pathogens produced spherical parasporal bodies, as found earlier by OHBA and AIZAWA (1986). Other reports have showen that isolates with cuboidal crystals exhibited insecticidal activity against diptera, whereas the isolates that produced bipyramidal inclusions exhibited only insecticidal toxicity against lepidoptera (KARAMANLIDOU et al 1991, MARTIN and TRAVERS 1989, MEADOWS et al 1992.…”

“…Bioassay: The toxicity of Bacillus thuringiensis isolates against members of diptera of the third instar larvae of Drosophila melanogaster and Culex sp. was determined according to the previously published method (KARAMANLIDOU et al 1991 andISHII andOHBA 1993).…”

Study of the Population Dynamics of the Olive Fly, <i>Bactrocera oleae</i> Rossi. (Diptera, Tephritidae) in the Region of Essaouira

“…In the station S2, the off-covered area is continually plowed and planted by the underlying culture. The reversal of the ground and putting into pupae found, exposed to the action of abiotic surface conditions (climatic factors) and biotic factors such as predators, bacteria and fungi [33]- [35]. The optimum climatic conditions allow the survival of pupae for long.…”

Larvicidal toxicity of Japanese Bacillus thuringiensis against the mosquito Anopheles stephensi

“…Other investigators observed that the activity of a fukuokaensis strain against Anopheles messeae Falleroni is far greater than for Culex modestus Ficalbi (V. A. Burlak and L. I. Burtzeva, personal communication). Karamanlidou et al (1991) reported that serogroup fukuokaensis includes strains highly toxic to larvae of the olive fruit fly, Dacus oleae (Gmelin) (Diptera: Tephritidae), a major pest of olive in Europe. Yu et al (1991) suggested that a 64-kDa protein is responsible for larvicidal activity of fukuokaensis against the mosquitoes Culex quinquefasciatus Say and Aedes aegypti (L.).…”