摘要
用昆虫病原线虫小卷蛾斯氏线虫 (ScBJ)、夜蛾斯氏线虫 (SfOtio)、拟双角斯氏线虫 (ScD43 )、格氏斯氏线虫 (SgNC3 2 )和嗜菌异小杆线虫 (HbE 6 7)对长角血蜱雌蜱进行感染试验 ,所用线虫剂量为 40 0 0IJs dish。结果表明 ,5种线虫均对长角血蜱雌蜱有致死效应。HbE 6 7和ScBJ两种线虫对雌蜱各发育期致病力最强 ,导致雌蜱的累积死亡率和半致死时间分别为饥饿雌蜱 82 5% ,9 0天和 75 0 % ,8 8天 ;吸血雌蜱 90 0 % ,8 0天和 82 5% ,8 0天 ;饱血雌蜱 93 3 % ,7 3天和 86 7% ,7 3天。ScD43对饱血雌蜱有较高的致死效应 ,为 80 0 % ,但半致死时间较长 ,为 11 7天。SfOtio和SgNC3 2对长角血蜱雌蜱的致死效应较低。
Infection of entomopathogenic nematodes Steinernema carpocapsae BJ(Sc BJ) ,S. feltiae Otio(Sf Otio),S. ceratophorum D43(Sc D43) and S. gla seri NC32(Sg NC32) (Steinernematidae),and Heterorhabditis bacteriophora E- 6-7 (Hb E-6-7) (Heterorhabditidae) to female Haemaphysalis longicornis Neumann was conducted. The nematodes dosage used was 4 000 IJs/dish. The results showed that the five entomopathogenic nematodes had lethal effects on female H .longicornis. Hb E-6-7 and Sc BJ were the most virulence species to various developmental stages of female ticks: the cumulative mortality and the LT_(50 ) of u nfed female ticks from nematodes infection were 82.5%,9.0 d and 75.0%,8.8 d, respectively; feeding female 90.0%,8.0 d and 82.5%,8.0 d; engorged fema le 93.3%,7.3 d and 86.7%,7.3 d. Sc D43 infection also caused high mortalit y (80.0%) to engorged female ticks, but the LT_(50) was relatively long (11 . 7 d). Lethal effects of Sf Otio and Sg NC32 to this tick were low. Engorged fem ale ticks were more sensitive than unfed and feeding female ticks.
出处
《昆虫学报》
CAS
CSCD
北大核心
2004年第1期20-24,共5页
Acta Entomologica Sinica
基金
河北省自然科学基金项目 ( 30 0 1 6 8)
河北省人事厅国际合作与交流中心资助项目
关键词
昆虫病原线虫
斯氏线虫
异小杆线虫
长角血蜱
致病力
Entomopathogenic nematodes
steinernematid
heterorhabditid
Haemaphysalis lon gicornis
virulence
