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Control of Spodoptera littoralis through moth and eggs treatment with Bacillus thuringiensis

Published online by Cambridge University Press:  19 September 2011

H. S. Salama
H. S. Salama
Affiliation:
Laboratories of Pests and Plant Protection, National Research Centre, Tahrir St, Dokki, Cairo, Egypt
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Abstract

The effectiveness of Bacillus thuringiensis var. galleriae HD-129 against the moths and egg masses of the cotton leafworm, Spodoptera littoralis, has been demonstrated in laboratory experiments. The longevity and egg production were significantly affected when the moths were fed on a sucrose diet containing 17.2 × 103 IU of the tested formulation/mg or higher rates. At lower concentrations (4.4−8.7 × 103 IU/mg), the females gave normal egg production, but the longevity was adversely affected. Investigations show that a formulation with spores alone affects the egg production and hatching, while a formulation with active crystals alone had no effect on egg production. Sprays of B. thuringiensis combined with sucrose on flowering cotton plants seem to affect the biology of the moths released on it. Egg masses sprayed with B. thuringiensis hatched normally, but the survival of the hatched larvae was reduced when treatment was made shortly before egg hatching. Based on the results obtained, B. thuringiensis showed a promising effect in the control of the moth S. littoralis as well as an ovicide larvicide agent.

Keywords

Bacillus thuringiensis var. galleriaeSpodoptera littoraliscotton leafwormlongevityegg productionsucrose diethatchability
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 6 , Issue 1 , February 1985 , pp. 49 - 53
Copyright
Copyright © ICIPE 1985

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References

REFERENCES

Abdallah, M. (1969) The joint action of microbial insecticides in the cotton leafworm Spodoptera littoralis (Boisd.). Bull. ent. Soc. Egypt, Econ. Ser. 3, 209–217.Google Scholar
Afify, A., Abdel Samei, M. and Merdan, A. (1968) Isolation and pathogenicity of 3 varieties of Bacillus associated with diseased cotton worms in Egypt. Proc. Egypt. Acad. Sci. 21, 87–89.Google Scholar
Afify, A. and Merdan, A. (1969) On tracing the response of some Egyptian cotton worms in different larval ages to Bacillus thuringiensis Berliner. Z. angew. Ent. 63, 263–267.CrossRefGoogle Scholar
Ali, A. S. and Watson, T. F. (1982) Effects of Bacillus thuringiensis var. kurstaki on tobacco budworm adult and egg stages. J. econ. Ent. 75, 596–598.CrossRefGoogle Scholar
Govindarajan, R., Jayaraj, S. and Narayanan, K. (1975) Observations on the nature of resistance in Spodoptera litura (F.) to infection by Bacillus thuringiensis Berliner. Ind. J. exp. Biol. 13, 548–550.Google ScholarPubMed
Moore, I. and Navon, A. (1973) Studies on the susceptibility of the cotton leafworm Spodoptera littoralis (Boisd.) to various strains of Bacillus thuringiensis. Phytoparasitica 1, 23–32.CrossRefGoogle Scholar
Potter, M. F., Jensen, M. and Watson, T. (1983) Influence of sweet bait Bacillus thuringiensis var. kurstaki combinations on adult tobacco budworm. J. econ. Ent. 75, 1157–1160.CrossRefGoogle Scholar
Salama, H. S. (1970) Rearing the corn borer Ostrinia nubilalis Hubn. on a semiartificial diet. Z. angew. Ent. 65, 216–218.CrossRefGoogle Scholar
Salama, H. S. (1983) Cotton pest management in Egypt. Crop Prot. 2, 183–191.CrossRefGoogle Scholar
Salama, H. S., Foda, M. S. and El-Sharaby, A. (1981) Potency of spore σ-endotoxin complexes of Bacillus thuringiensis against some cotton pests. Z. angew. Ent. 91, 388–398.CrossRefGoogle Scholar
Salama, H. S. and Foda, M. S. (1982) A strain of Bacillus thuringiensis var. entomocidus with high potential activity on Spodoptera littoralis. J. Invertebr. Path. 39, 110–111.CrossRefGoogle Scholar
Salama, H. S., Foda, M. S., Zaki, F. and Khalafallah, A. (1983a) Persistence of Bacillus thuringiensis Berliner spores in cotton cultivations. Z. angew. Ent. 95, 321–326.CrossRefGoogle Scholar
Salama, H. S., Azmy, N. and Sharaby, A. (1983b) Gustation in the moth Spodoptera littoralis. Zool. Jb. Physiol. 88, 165–178.Google Scholar
Salama, H. S., Rizk, A. and Sharaby, A. (1983c) Chemical stimuli in flowers and leaves of cotton that affect moth behaviour of Spodoptera littoralis. Entomologia gen. In press.CrossRefGoogle Scholar
Salama, H. S., Foda, M. and Sharaby, A. (1984) Role of feeding stimulants on the potency of B. thuringiensis vs cotton pests. J. Invertebr. Path. In press.Google Scholar