Effects of the spore-endotoxin complex of a strain of Bacillus thuringiensis serovar morrisoni upon Triatoma vitticeps (Hemiptera: Reduviidae) under laboratory conditions

Mm, Lima; Santos, D. A.; Mh, da Silva; Rabinovitch, Leon

doi:10.1590/s0074-02761994000300019

Cited by 3 publications

(2 citation statements)

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“…Walters and English (1995) reported that the purified crystal preparations of several B. thuringiensis Cry proteins exhibited rapid and strong oral toxicities against the potato aphid, Macrosiphum euphorbiae . Lima et al. (1994) also showed that the spore/crystal complex of a B. thuringiensis serovar morrisoni strain gave delayed but high mortalities to Triatoma vitticeps , a blood‐feeding hemipteran that transmits Chagas disease.…”

Section: Discussionmentioning

confidence: 99%

Identification of two haemolysins in larvicidal activity of Bacillus thuringiensis against the bean bug, Riptortus clavatus

Kubota

Ohgushi

Uemori

et al. 2006

J Applied Entomology

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This study characterized larvicidal activity against the bean bug, Riptortus clavatus (Hem., Alydidae), associated with a strain of Bacillus thuringiensis serovar morrisoni (H8ab). Purified crystals and solubilized crystal proteins exhibited only low-level activities, while the supernatant of broth culture contained rapid and strong larvicidal activity. Heating at 100°C for 10 min destroyed the activity. Two extracellular vegetative proteins, with molecular masses of 40 and 45 kDa, were obtained by diethylaminoethyl (DEAE)-cellulose column chromatography from the bacterial culture fluid. Both proteins were related to the known haemolysins of Bacillus cereus, showing strong cytolytic activity against sheep erythrocytes. The bean bug-killing activity was not associated with individual proteins; however, strong activity was induced when two proteins were combined. The combined proteins were toxic to larvae in the early stage of first instar but not against larvae of later instars and adults. Larvae of the diamondbackmoth, Plutella xylostella, were not killed by these proteins.

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Section: Discussionmentioning

confidence: 99%

Identification of two haemolysins in larvicidal activity of Bacillus thuringiensis against the bean bug, Riptortus clavatus

Kubota

Ohgushi

Uemori

et al. 2006

J Applied Entomology

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“…For example, the spore-crystal complex LFB-039 of B. thuringiensis subsp. morrisoni was evaluated in Triatoma vitticeps Stål (Hemiptera: Reduviidae); however, this strain did not show activity (Lima et al 1994). Another work evaluated the toxins Cry1Ac and Cry2Ab against Lygus hesperus Knight (Hemiptera: Miridae) without finding mortality (Brandt et al 2004).…”

Section: Discussionmentioning

confidence: 99%