摘要
灭幼脲可影响东方粘虫蜕皮甾类滴度,并表现出如下特点:(1)强烈抑制末龄幼虫血淋巴蜕皮甾类滴度峰,并存在一定的剂量依赖关系,但对峰以外时间的滴度无影响;(2)点滴处理东方粘虫体壁后,灭幼脲以剂量依赖的方式抑制前胸腺的分泌活力,但却不抑制离体前胸腺分泌蜕皮酮;(3)灭幼脲抑制促前胸腺激素对前胸腺的活化。
Diflubenzuron (DFB) seriously suppressed in a dose-dependent manner the ecdysteroid peak of sixth instar larvae. Topically applied 0.04μg DFB per larva to day-0 sixth instar larvae, the ecdysteroid peak was inhibited by approximately 75%.More detailed researches revealed that DFB did not inhibit isolatcd PG in vitro for synthesizing and/or secreting ecdysone. However, DFB suppressed in a dose-dependent manner the ability of PG in vivo test to secrete ecdysone. The results also indicated that the activation of day-2 PG by prothoracicotropic hormone (PTTH) was inhibited by DFB, causing that the ability of PG to secrete ccdysone was greatly suppressod. Because day-2 PG has acquired the competency to PTTH, the action of DFB was different from that of JH, which inhibited the activation of PG by suppressing its competency to PTTH.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1991年第4期33-38,共6页
Journal of Nanjing Agricultural University
基金
国家自然科学基金
关键词
灭幼脲
毒理学
粘虫
蜕皮激素
diflubenzuron
toxicology
ecdysteroid
prothoracicotropie hormone
prothoracie gland
Mythimna separata
