An historical perspective of the ‘Blandford Fly’ (Simulium posticatum Meigen) problem and attempted control of the pest species using Bacillus thuringiensis var. israelensis     

Mike Ladle  Stewart Welton 《Integrated Pest Management Reviews》1996,1(2):103-110

This review deals with the biology and control of a biting pest species, Simulium posticatum, which has been responsible for a considerable degree of distress to the human population in the vicinity of the River Stour in Dorset. Each phase of the life cycle of the insect is considered in relation to possible control measures. An account is given of how this information has been combined with the use of Bacillus thuringiensis in a successful, precisely targeted attack on the pest.  相似文献   

对小菜蛾高毒的苏云金杆菌菌株筛选试验初报   总被引：1，自引：0，他引：1  

陈焕瑜  肖宏英 《植物保护》1995,21(5):4-6

从田间自然死亡的小菜蛾虫尸中分离到Ｂ．ｔ．９４１９茵株，经复壮选育及摇瓶考核，在自选培养基上生长良好，２４ｈ孢子开始脱落形成晶体，３６ｈ全部形成晶体。晶体大、宽棱形、角尖。４８ｈ发酵液含菌量为３５亿／ｍＬ。经发酵液对小菜蛾毒力测定，４８ｈＬＣ_５０：对照ＨＤ－１含菌量为２７４ｍＬ／Ｌ，而９４１９仅１２４ｍＬ／Ｌ。  相似文献   

苏云金素在水中和植株上的衰减与残留     

林开春  操继跃 《中国生物防治》1995,11(3):97-100

用ＨＰＬＣ检测了苏云金素在鱼塘水和清水中的衰减速率。清水中该物质的半衰期长达４３３小时；在鱼塘水中苏云素的衰减呈双指数消除模型，开始消除半衰期为２．４３－１０．６８小时，终末消除半衰期为１２８．５７－１４２．０１小时。  相似文献   

苏云金素与苏云金杆菌芽孢晶体混剂对小菜蛾的增效作用   总被引：5，自引：0，他引：5  

林开春 《植物保护学报》1995,22(1):27-32

将苏云金素和苏云金杆菌的孢晶制剂分别作为单一制剂，用混和饲料感染法在室内测定苏云金素分别与苏云金杆菌ＨＤ－１、ＣＴ－４３、８１－６、ＷＰ－２等４个菌株孢晶制剂的混剂对小菜蛾幼虫的协同作用。按Ｓｕｎ－Ｊｏｈｎｓｏｎ毒力指数法计算结果表明，苏云金素对所有供试菌的孢晶制剂都有增效作用，共毒系数从１２７．４３至４１５．６２不等。当混剂以芽孢晶体为主要活性组分，苏云金素占全部活性组分的１６．７％情况下增效作  相似文献   

利用核型多角体病毒防治豆天蛾幼虫的研究     

孙发仁 《中国生物防治》1993,(1)

室内试验,豆天蛾核型多角体病毒感染3龄幼虫的致死中浓度(LC_(50))为1.4×10~(4(?)8)个多角体/毫升。田间试验,喷施1.6×10~7多角体/毫升的病虫尸匀浆液,对豆天蛾幼虫的防治效果在70％左右。豆天蛾核型多角体病毒与苏云金杆菌或银纹夜娥核型多角体病毒混用,防治同时发生的多种大豆害虫的总效果明显提高,虫口下降率可达90％左右。  相似文献   

农作物重要病原菌颉颃菌的筛选     

张学君  缪卫国  朱桂宁  王金生 《中国生物防治》1993,(3)

从全国6省12个地区的26种植物根围采集到土壤样本50份。经室内分离、纯化后得到以芽孢杆菌为主的细菌菌株226个。以水稻、小麦和棉花等6种农作物上主要病原菌(8种真菌,4种细菌)为指示菌对这226个菌株进行平板双培养法抑菌测定,分别筛选到至少对1种病原真菌或细菌有颉颃活性的菌株95个和78个。对进一步研制防治不同作物病害的生物制剂建立了一个颉颃菌资源库。  相似文献   

应用超声波破碎苏云金芽孢杆菌试验   总被引：1，自引：0，他引：1  

魏万勇  苏智先 《四川蚕业》2006,34(2):5-7

用超声波对一定浓度的苏云金芽孢杆菌的营养细胞和芽孢进行破碎试验,结果表明:在试验条件下,超声波破碎达到95%以上的破碎率所需时间为30~50min,尤其是菌液浓度为每毫升50亿,用Φ10变幅杆破碎,40min破碎率可达99.9%。而细菌的芽孢,无论是采用幅杆Φ6或Φ10,其破碎效果不明显。  相似文献   

蕈状芽孢杆菌代谢产物活性成分对小鼠免疫功能的影响     

《中国兽医科技》2006,36(12):983-987

  相似文献   

Lipid metabolism in tomato and bean as a sensitive monitor for biocontrol of wilt diseases     

E. F. Abd-Allah  Abeer Hashem  S. M. Ezzat 《Phytoparasitica》2006,34(5):516-522

The lipids metabolism of tomato and bean plants during biological control of wilt pathogens (Fusarium oxysporum f.sp.lycopersici andF. oxysporum f.sp.phaseoli, respectively) byBacillus subtilis was investigated. The interaction of wilt pathogens with both tomato and bean caused an imbalance and drastic reduction in total lipids, triacylglycerol, sterol and all phospholipd fractions except phosphatidic acid. The application of a formulated biocontrol agent,B. subtilis, eliminated the detrimental effect of both wilt pathogens and consequently prevented catabolism of lipid fractions in both tomato and bean. Moreover, the changes in the lipid fractions as a sensitive monitor for biocontrol of wilt diseases suggest a positive correlation between the application ofB. subtilis and improvement in the host metabolism towards anabolism. http://www.phytoparasitica.org posting Sept. 20, 2006.  相似文献   

Evaluation of a Bacillus stearothermophilus tube test as a screening tool for anticoccidial residues in poultry     

Anakalo Shitandi  Aila Oketch  Symon Mahungu 《Journal of veterinary science (Suw?n-si, Korea)》2006,7(2):177-180

A Bacillus stearothermophilus var. calidolactis C953 tube test was evaluated for its ability in detecting the residue of selected anticoccidial drugs in poultry, specically sulfamethazine, furazolidone, and amprolium. Various concentrations of each drug were injected into chicken liver and kidney tissues and these tissues were tested to determine the drug detection limits for each drug. The detection limit was defined as the drug concentration at which 95% of the test results were interpreted as positive. The limits of detection in liver tissue were 0.35 µg/ml for furazolidone, 0.70 µg/ml for sulfamethazine and 7.80 µg/ml for amprolium. In kidney tissues, they were 0.30 µg/ml for furazolidone, 0.54 µg/ml for sulfamethazine, and 7.6 µg/ml for amprolium. It was concluded that this tube test could be used to screen for the residue of these three drugs in poultry.  相似文献