Effect of Bt-cotton on chrysopids, ladybird beetles and their prey: aphids and whiteflies.
Indian J Exp Biol
;
2007 Jun; 45(6): 554-62
Artigo
em Inglês
| IMSEAR
| ID: sea-57923
ABSTRACT
The effect of Bt-cotton, i.e. genetically modified cotton that contain genes expressing delta-endotoxin, on aphid, whitefly, chrysopid and coccinellid populations was determined with a two-year field study at a cotton farm near Marble Hall, South Africa. Although Bt-cotton is lepidopteran specific, non-lepidopteran arthropod populations may be indirectly influenced by the endotoxin. Abundance of aphid, whitefly, chrysopid and coccinellid populations and predator-prey interactions were used as measures to determine possible effects on the populations under investigation. The cultivation of Bt-cotton had no effect on aphid, whitefly, chrysopid or coccinellid abundance. Positive density dependent interactions occurred between aphids and coccinellids which were not influenced by Bt-cotton. A significant relationship between whitefly and coccinellid abundance, i.e. predator-prey reaction, occurred in the control and sprayed non-Bt cotton fields but was absent from the Bt-cotton fields.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Afídeos
/
Besouros
/
Densidade Demográfica
/
Plantas Geneticamente Modificadas
/
Ecossistema
/
Gossypium
/
Cadeia Alimentar
/
Dípteros
/
Endossulfano
/
Hemípteros
Idioma:
Inglês
Revista:
Indian J Exp Biol
Ano de publicação:
2007
Tipo de documento:
Artigo
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