Effects of precocene and azadirachtin in Rhodnius prolixus: some data on development and reproduction
Mem. Inst. Oswaldo Cruz
;
82(supl.3): 67-73, 1987. graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-623740
ABSTRACT
The results presented in this paper clearly indicate that precocene and azadirachtin are effective inhibitors of moulting and reproduction in the hemipteran Rhodnius prolixus. The time of application is important and only applications of these substances early in the intermoulting period cause their effects in nymphs. The inhibition of moulting is fully reversed by ecdysone therapy. Precocene and azadirachtin also affected drastically the oogenesis and egg deposition in this insect. Precocene-induced sterilization is reversed by application of juvenile hormone III. However, this hormone is unable to reverse the effect of azadirachtin on reproduction. Ecdysteroid titers in nymphs and adult females are decreased by these treatments. In vitro analysis suggest that precocene and azadirachtin may act directly on the prothoracic glands and ovaries producing ecdysteroids. Based on these and other findings the possible mode of action of these compounds on the development and reproduction of Rhodnius prolixus is discussed.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Farmacologia
/
Azadirachta
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
1987
Tipo de documento:
Artigo
/
Congresso e conferência
País de afiliação:
Brasil
Instituição/País de afiliação:
Instituto Oswaldo Cruz/BR
/
Universidade Federal Fluminense/BR
Similares
MEDLINE
...
LILACS
LIS