家蚕微粒子病母蛾检查五次抽样方案研究

为了保证蚕种质量 ,提出了家蚕微粒子病母蛾抽样检查的五次抽样方案。理论计算、计算机模拟和实际检验的结果证明 ,通过适当的设计 ,可以找到与现行二次抽样方案抽样特征曲线相近的五次抽样方案 ,即具有相近的生产方风险和使用方风险 ,而使平均镜检次数明显减少。五次抽样方案的操作步骤相对繁琐 ,但可以采用计算机抽样检查软件弥补     

无锡新农村庭院绿化模式及结构布局研究

以无锡市锡山区羊尖镇丽安村村庄绿化为例,对新农村庭院绿化现状进行了研究与分析。无锡庭院绿化模式可分为景观苗圃型、经济林果型、观赏花圃型、园林小品型、休憩游园型、自然植被型。该村庭院绿化共有木本植物31科48属69种(变种)。其中裸子植物6科6属8种(变种),被子植物25科42属61种(变种)。优势科分别是蔷薇科(5属15种)、木犀科(4属6种)、蝶形花科(4属4种)、木兰科(2属3种)、榆科(3属4种)、竹亚科(2属4种)。庭院绿化单元的功能布局可分为前庭、左庭、右庭、后院、外围6个绿化位点。作者还就无锡市庭院绿化所面临的问题进行了探讨。     

苍耳提取液与植物内生真菌抗菌活性研究(英文)

[Objective] The study was aimed to provide theoretical foundation for developing a new fungicide with high activity,low toxicity and low residua.[Method] Based on the plant growth rate and inhibition zone methods,the antifungal activity of extracts of every organ of Xanthium sibiricum,the fermentation liquid of endophytic fungi MC4-23,and the extract of mycelium were tested with six kinds of pathogenic fungi and three kinds of pathogenic bacteria respectively.[Result] The extract of every organ of Xanthium sibiricum,the fermentation liquid of endophyic fungi MC4-23,and the extract of mycelium all had antifungal activities.The acetone extracts of Xanthium sibiricum had stronger antifungal activities than the ethanol extracts of Xanthium sibiricum.The extracts of leaf have the strongest antifungal activities against fungi and bacteria.The inhibition rates of the six pathogenic fungi were all above 47.8%,and the inhibition diameters of the three pathogenic bacteria were all above 0.5 centimeter.The fermentation liquid of endophytic fungi also had strong activities against the fungi and bacteria.The inhibition rates of the six pathogenic fungi were all above 68.1%.The extracts of root of Xanthium sibiricum and the mycelium of endophytic fungi were all had antifungal activities.[Conclusion] Xanthium sibiricum and endophyic fungi MC4-23 had great value of development and utilization.     

家蚕微粒子病蛾不同制种日分布状况分析

对 194个原种带毒批微粒子病母蛾在不同制种日之间的分布状况做了统计分析 ,结果表明 :72 4 6 %的带毒批在不同制种日之间微粒子孢子带毒集团检出率未见显著差异 ;2 7 5 4 %带毒批在不同制种日之间微粒子孢子带毒集团检出率有显著差别 ,制种首、末日带毒蛾数的多少没有明显的规律。在家蚕母蛾微粒子病抽样检查时 ,应采取逐日分层抽样方法 ,以提高送检样本对全批毒率的代表性。如果有选择地在某一天袋蛾 ,不仅不能正确反应该批的微毒情况 ,反而可能使检验样本的毒率增高 ,造成合格蚕种的误淘汰 ;也有可能造成检验样本的毒率降低 ,导致不合格蚕种流入市场。     

无锡地区橘小实蝇综合防治体系的建立

从组织保障、政策保障、技术保障、资金保障、科技保障等多方面阐明建立橘小实蝇综合防治体系的重要性和必要性.系统介绍了无锡地区采取的农业防治,壤处理和土壤消毒,诱剂监测与诱杀,冠喷药,园冬管等综防措施,在无锡地区初步建立了橘小实蝇综合防治体系,在生产实践中取得了良好防效.