Effectiveness of "Bacillus thuringiensis" strains against "Spodoptera frugiperda" (Lepidoptera: Noctuidae)
Braz. j. microbiol
; 31(3): 165-7, jul.-set. 2000. tab, graf
Article
em En
| LILACS
| ID: lil-297392
Biblioteca responsável:
BR32.1
ABSTRACT
The fall armyworm ("Spodoptera frugiperda") is one of the most important pests of maize, causing up to 20(per cent) production losses when defoliation occurs near to flowering, or even complete destruction of plants. Among the alternatives to control this pest, the use of "Bacillus thuringiensis" ("Bt") has gained attention due to its efficiency and low impact on natural enemies. Strains "Bt dendrolimus" HD 37, "Bt aizawai" HD 68, "Bt kurstaki" HD 73, "Bt darmstadiensis" HD 146, and "Bt thuringiensis" 4412 were tested against second instar larvae in "in vivo" assays. Suspensions of "Bt aizawai" HD 68 and "Bt thuringiensis" 4412, containing 3 x 10 8 cells/ml, induced mortality of 100(per cent) and 80.4(per cent), respectively. To test virulence, cell concentrations of 8x10(5) to 3x10(8) cells/ml of strains "Bt aizawai" HD 68 and "Bt thuringiensis" 4412 were applied on the second instar larvae LC(50) were 6.7x10(6) and 8.6x10(6) cells/ml, respectively.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Bacillus thuringiensis
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Técnicas In Vitro
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Controle Biológico de Vetores
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Insetos
Limite:
Animals
Idioma:
En
Revista:
Braz. j. microbiol
Assunto da revista:
MICROBIOLOGIA
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil