山楂叶螨对常用杀螨剂的敏感性研究   总被引：4，自引：0，他引：4  

刘金香  韩巨才  刘慧芹  徐琴  梁廷康  冀堂钢  梁建平 《山西农业大学学报(自然科学版)》2001,21(3):218-220

采用玻片浸渍法 ,测定了山楂叶螨雌成螨对常用杀螨剂的敏感性。结果表明 ,雌成螨对供试杀螨剂的敏感性依次为齐螨素 >三唑锡 >甲氰菊酯 >三氯杀螨醇 >哒螨灵 >毒死蜱 >双甲脒 >苯丁锡 >水胺硫磷 >四螨嗪。与国内报道的敏感基线比较 ,晋中山楂叶螨种群对水胺硫磷、甲氰菊酯和三氯杀螨醇表现为中等抗药性 ,对双甲脒产生了低水平抗药性 ,而对毒死蜱和苯丁锡仍很敏感。在此基础上提出了山楂叶螨抗药性综合治理的措施。  相似文献   

抗、感稻瘟病品种的过氧化物酶同功酶分析     

何祖华石春海  申宗坦黄大年 王金霞 《中国水稻科学》1989,3(2):95-96

用一些对稻瘟病表现抗病和感病的不同品种和近等基因系,进行了过氧化物酶同工酶电泳分析。共检测到12～13条过氧化物酶酶带,在接种和不接种稻瘟病菌的情况下,水稻过氧化物同工酶谱无明显差异,但可发现抗病品种（系）要比感病品种（系）多一条或两条弱的酶带,且个别酶带的活性也较高。表明过氧化物酶与抗病性有关,可以作为鉴定品种抗瘟性的一种生化指标。  相似文献   

Per os challenge of Litopenaeus vannamei postlarvae and Farfantepenaeus duorarum juveniles with six geographic isolates of white spot syndrome virus     

Qiong Wang  Brenda L. White  Rita M. Redman  Donald V. Lightner 《Aquaculture (Amsterdam, Netherlands)》1999,170(3-4):179-194

White spot syndrome virus (WSSV) is one of the most important pathogens of penaeid shrimp. It is widely distributed in most Asian countries where penaeid shrimp are cultured, as well as in the Gulf of Mexico and SE USA. The virulence of six geographic isolates of WSSV was compared using Litopenaeus vannamei postlarvae and Farfantepenaeus duorarum juveniles. The six geographic isolates of WSSV originated from China, India, Thailand, Texas, South Carolina, as well as from crayfish maintained at the USA National Zoo. For challenge studies, virus infected tissues were given per os to L. vannamei postlarvae and Fa. duorarum juveniles. Resultant WSSV infections were confirmed by histological examination. The cumulative mortality of L. vannamei postlarvae reached 100% after challenge with each of the six geographic isolates of WSSV. However, the Texas isolate caused mortalities more rapidly than did the other shrimp isolates; the crayfish WSSV isolate was the slowest. In marked contrast, cumulative mortalities of juvenile Fa. duorarum reached only 35–60%, and varied among the geographic isolates of WSSV. Interestingly, in Fa. duorarum, the Texas WSSV isolate was also the most virulent, while the crayfish WSSV was the least virulent. The findings suggest that slight differences in virulence exist among geographic isolates of WSSV, and that susceptibility may vary with species and lifestages of the host.  相似文献