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近年来,很多地方推广省力化养蚕,利用大棚或用砖头围成畦饲养桑蚕。但在饲养过程中,必须注意防止以下几害:1.病害室外地面病原较多,污染严重,在选择隙地建畦、搭建大棚时,必须在养蚕前对地面进行严格消毒,并做好蚕具消毒。消毒后的蚕具要曝晒3 ̄4天,以彻底杀灭病原。可用3%漂白粉水进行地面消毒,或用硫磺粉撒于地面,驱赶蚂蚁及各类虫害,一般每10平方米用1.35 ̄1.80公斤。养蚕期间要经常使用新鲜石灰粉、防病1号、蚕座净等药剂进行蚕体、蚕座消毒,及时添加氯霉素,不给蚕吃湿桑叶,控制病毒病和细菌病的发生。2.蚁害蚂蚁是室外养蚕的一大敌害,… 相似文献
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<正>一要严格消毒防病。养蚕前要全面打扫,按照"三消一熏"的要求严格消毒。1~3龄期要多用防僵粉和干燥材料,每龄眠、起和盛食期给桑前用小蚕防病一号进行蚕体、蚕座消毒,保持蚕座干燥。蚕眠后要及时用三七糠止桑。 相似文献
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农村蚕病暴发往往是由于消毒不严、饲养管理粗放导致病原污染蚕体蚕座的机会增多造成的,因此农村蚕病防治应考虑多种因素,在掌握农村蚕病发生规律的基础上,将病害防治和养蚕技术结合起来,采取综合措施防治蚕病,才能收到良好的防治效果. 相似文献
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1.严格消毒,杜绝传染。消毒防病,消灭病原是蚕病综合防治中最为重要的措施。养蚕生产上危害最严重的是传染性蚕病,它们的发生是由于病原微生物传染的结果。要确保养蚕安全,就必须进行彻底消毒,消灭病原。 相似文献
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茶尺蠖NPV对茶尺蠖幼虫取食及生长发育的影响 总被引:1,自引:0,他引:1
喂饲茶尺蠖核型多角体病毒(EoNPV)后,茶尺蠖幼虫的总食量极显著下降。1、2龄初饲毒,减少90.99~99.39%;3、4、5龄初饲毒,减少47.24~54.18%。总食量减少的主要原因是取食速率的显著减缓。1龄初饲毒,总取食期极显著缩短;2、5龄初饲毒,与对照无显著差异;3、4龄初饲毒,则总取食期极显著延长。各龄初饲毒后,该龄和下几龄的历期一般都极显著延长。饲毒后,幼虫体重明显减轻,能化蛹的蛹重也显著下降,但蛹历期和成虫寿命不受影响,上述结果表明,以EoNPV防治茶尺蠖幼虫宜在2龄初或其以前应用。在3龄初及其以后饲毒,高温条件下虽然幼虫死亡率不高,但总食量明显下降,仍有一定的效果。 相似文献
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[目的]探索一株新的空多角体突变的HaSNPV的生物学性质。[方法]利用同源重组的方法构建HaSNPV细菌人工染色体的过程中,发现一株多角体病毒对棉铃虫幼虫无毒性。通过电镜观察和Western-blot检测对多角体的生物学性质进行了初步探索。[结果]细胞和多角体的电镜结果表明,该病毒能形成正常的多角体外壳,但是不能包装病毒粒子。通过PCR检测,发现其ORF51-54片段缺失,但这一多角体的突变并不与多角体基因和p10基因有关,ORF53(fp25)的回复也证明fp25的缺失不是造成此突变的原因。[结论]该突变株将为HaSNPV基因功能的研究提供良好的技术平台与研究素材。 相似文献
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粘虫核型多角体病毒感染特性的研究 总被引:1,自引:1,他引:0
对东北农业大学昆虫学教研室分离出来的粘虫核型多角体病毒V-Ms-4毒株进行初步研究,结果表明,病毒多角体呈近圆形、四角形、六角形和不规则形,大小在1.16~2.86μm之间,病毒粒子为389~467μm×40~68μm,为多粒包埋,病毒在粘虫消化液作用下,10min失去折光性,30min内完全被溶解,释放出病毒粒子;消化液能使释放出的病毒粒子在15min内失活;寄主的脂肪、气管基质及表皮组织为感染病毒的敏感组织,感染后脂肪和血淋巴蛋白的含量比健康幼虫明显降低,未见病毒侵染中肠的现象。 相似文献
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[目的]探讨家蚕品种ZHG×春54在云南省秋季气候条件下小蚕颗粒人工饲料育的效果。[方法]采用小蚕颗粒人工饲料育、大蚕桑叶育的饲养形式,探讨ZHG×春54在云南秋季气候条件下对颗粒人工饲料的适应性及其经济性状。[结果]ZHG×春54对颗粒人工饲料的摄食性良好,24 h疏毛率及192 h小蚕存活率等指标均接近菁松×皓月全龄桑叶育;但2龄和3龄起蚕率以及1~3龄眠蚕体重低于菁松×皓月,各龄及全龄发育经过比菁松×皓月延长。全茧量、茧层量、茧层率等指标不同程度高于菁松×皓月,但是万头产茧量和生命率低于菁松×皓月。[结论]ZHG×春54在云南省具有良好的应用推广前景。 相似文献
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Study on the Quantity Dynamic Changes of Heterobacteria and Vibrios in Larvae Industrialized Culture System 总被引:4,自引:0,他引:4
MA Yan LI Jian WANG Bin WANG Qun LIU Qi. College of Life Sciences Technology Dalian Fisheries University Dalian . Key Laboratory for Sustainable Utilization of Marine Fishery Resources Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 《(《农业科学与技术》)编辑部》2008,(2)
[Objective] The dynamic change of heterobacteria and vibrios in larvae industrialized culture system was studied to provide scientific reference for healthy cultivation of shrimp.[Method] The heterobacteria,vibrios and pathogenic vibrio parahaemolyticus were monitored in larvae industrialized culture system.[Result] The heterobacteria,vibrios and pathogenic vibrio parahaemolyticus were the most in fertilized eggs of shrimp but the least in nauplius,then their number would increase with growth. During whole rearing period,both heterobacteria in larvae,vibrios in water would increase by one order of magnitude,while both vibrios in larvae and heterobacteria in water would increase by two orders of magnitude.There were many heterobacteria and vibrios but few vibrio parahaemolyticus in living bait.The correlation coefficients between larvae and heterobacteria and vibrios in water were 0.704 and 0.840 in culture system respectively,while the correlation among heterobacteria,vibrios in living bait and larvae,water were weak or negative.[Conclusion] There was a dynamic relation between water and larvae in rearing period,and restrictly control of culture condition would restrain the occurrence of disease caused by vibrio parahaemolyticus,besides that bacteria number in bait was not obviously correlated with bacteria nubmer in culture system. 相似文献
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《(《农业科学与技术》)编辑部》2008,(2)
[Objective] The dynamic change of heterobacteria and vibrios in larvae industrialized culture system was studied to provide scientific reference for healthy cultivation of shrimp.[Method] The heterobacteria,vibrios and pathogenic vibrio parahaemolyticus were monitored in larvae industrialized culture system.[Result] The heterobacteria,vibrios and pathogenic vibrio parahaemolyticus were the most in fertilized eggs of shrimp but the least in nauplius,then their number would increase with growth. During whole rearing period,both heterobacteria in larvae,vibrios in water would increase by one order of magnitude,while both vibrios in larvae and heterobacteria in water would increase by two orders of magnitude.There were many heterobacteria and vibrios but few vibrio parahaemolyticus in living bait.The correlation coefficients between larvae and heterobacteria and vibrios in water were 0.704 and 0.840 in culture system respectively,while the correlation among heterobacteria,vibrios in living bait and larvae,water were weak or negative.[Conclusion] There was a dynamic relation between water and larvae in rearing period,and restrictly control of culture condition would restrain the occurrence of disease caused by vibrio parahaemolyticus,besides that bacteria number in bait was not obviously correlated with bacteria nubmer in culture system. 相似文献
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蚕桑产业是白河县三大优势主导产业之一,由于受产业效益和蚕茧价格波动的影响,已成为弱势产业,为推进陕西省白河县蚕桑产业化经营,通过对劳动力市场分析,针对目前存在的问题,提出加强蚕桑资源的综合利用,发展桑园林下经济,提升蚕农年收入水平;以科技为支持,提升蚕农科技养蚕水平;推广"小蚕共育"养殖模式,提升养蚕劳日工值水平;促进桑园土地流转,提升养蚕规模化、集约化、专业化水平;优化惠农政策,提升蚕桑产业化水平。 相似文献
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[目的]探讨取食转基因棉棉叶的白粉虱对T纹豹蛛生长发育及捕食的影响。[方法]在室内条件下,测定取食转基因棉和常规棉的白粉虱对T纹豹蛛发育历期、成蛛体重、死亡率、性比、耐饥力和捕食功能反应的影响。[结果]T纹豹蛛取食用转基因棉棉叶处理的白粉虱与取食普通棉叶处理的白粉虱发育历期、成蛛体重、死亡率和性比都无显著差异。捕食功能反应试验结果表明,T纹豹蛛对白粉虱幼虫的捕食功能反应符合HollingⅡ型圆盘方程;取食常规棉处理的白粉虱的T纹豹蛛猎物瞬时发现率和耐饥力显著高于转基因棉。[结论]该研究为研究转基因棉对棉田捕食天敌的影响提供了依据。 相似文献
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[目的]通过对引进的几个桑品种的原蚕饲育成绩进行了初步调查,研究云南省主要桑树品种对原蚕饲育成绩的影响。[方法]用不同桑品种在相同饲育条件下分别饲养原蚕,测定调查龄期经过、蛹期经过、全茧量、茧层量、茧层率、幼虫生命率、虫蛹统一生命率、死笼率、单蛾产卵数、单蛾良卵数、良卵率等指标。[结果]蚕期发育经过及幼虫生命率、虫蛹统一生命率等无显著差异;但死笼率盛东1号较高,育71-1较低的倾向。春期用育71-1的桑叶饲育原蚕的全茧量、茧层量均高于对照,茧层率略高于对照。[结论]春期原蚕繁育用桑适宜选择的桑品种依次为育71-1、农桑14号、湖桑32号、盛东1号;秋期原蚕繁育用桑适宜选择的桑品种依次为湖桑32号、育71-1、农桑14号、盛东1号。 相似文献