Deltamethrin resistance in Rhyzopertha dominica in Taiwan and
the selection of rotational
insecticide
Chun-Ying Chen, Mei-Er Chen
Department of Entomology, National Chung Hsing University
Rhyzopertha dominica
12.76 g/ml0.2 g/ml
6410~52
184 g/ml14.1 g/ml
2.14 g/ml0.96~2.64 g/ml
(Key words) (Rhyzopertha dominica) (resistance)
(deltamethrin)
(spinosad)
E-mail [email protected] 04-xxxx-xxxx ext.xxx
Hormonal regulation of the yolk protein genes in the oriental
fruit fly, Bactroceradorsalis
(Hendel) (Diptera: Tephritidae)
1 2 1
Hsiu-Ling Chen1, Chung-Pin Lin
2, Kuang-Hui Lu
1
1 Department of Entomology, National Chung Hsing University 2
Taiwan Sugar Research Institute
Yolk protein/vitellogenin is the major content of yolk which is
the source of nutrition for embryonic
development. In this study, two yolk protein (YP) cDNAs, Bdyp1
and Bdyp2, were identified in the oriental
fruit fly, Bactrocera dorsalis (Hendel). RT-PCR analysis
revealed that both YP genes were only expressed
in the fat body and ovary of adult females. The tendency of the
two gene expression patterns is following
vitellogenesis of first batch eggs. Furthermore, the expression
profiles between Bdyp1 and Bdyp2 are
different in fat body, indicating that divergent regulatory
mechanisms might exit in B. dorsalis yolk protein
gene expression. While 20-hydroxyecdysterone (20E) plays a major
role to promote Bdyp1 expression in in
vitro fat body, Bdyp2 exhibited greater response to JH III.
Unexpectedly, 20E-induced yp geneexpression
was suppressed by the addition of JH before 20E treatment;
conversely, it was enhanced by the addition of
JH after 20E treatment.
Key words (Bactrocera dorsalis) (yolk protein)
(ecdysteroids) (juvenile hormone) (fat body)
E-mail [email protected] 04-xxxx-xxxx
