一起动物检疫行政不作为案的诉讼启示

1案例2004年12月10日,我市某区人民法院公开审理了某生猪屠宰企业诉动物检疫站不履行法定检疫职     

新阶段的新问题——关于当前畜牧产业发展的几点思考

当前畜牧业发展已经进入一个新阶段,规模化、集约化比重增加,畜产品数量与质量并重,畜牧业与整个社会和谐发展,成为这一阶段     

浅谈动物卫生监督机构行政处罚案件中的证据规则

动物卫生防疫监督机构依法承担着动物防疫、检疫与动物产品安全监管的行政执法重要职能。在动物卫生防疫行政处罚案件中,证明当事人的违法事实及行政处罚的合法性的核心是证据。根据我国行政处罚法及现行的动物卫生防疫监督机构行政处罚程序规定,可以作为行政处罚的     

Genetic heterogeneity of leucostoma species in michigan peach orchards

ABSTRACT The pathogens causing perennial canker of peach, Leucostoma spp., were characterized in Michigan orchards to identify which species and subgroups (cryptic species) were prevalent on a highly susceptible peach cultivar, Loring, and a less susceptible cultivar, Redhaven. Four hundred and three strains of Leucostoma were isolated from cankers in three southwest Michigan orchards where 'Loring' occurred adjacent to 'Redhaven' in side-by-side plots. Based on colony morphology and small nuclear rDNA size polymorphisms, three cryptic species were detected; 89% of the isolates were identified as L. persoonii phenetic group 1, 10% were L. cincta group 4, and 1% were L. persoonii group 2. Pathogen profiles differed significantly between cankers on small branches of 'Loring' and 'Redhaven', and between cankers on small branches and trunks. Of 1,232 random pairings among isolates of L. persoonii group 1, 95% were vegetatively incompatible. A minimum of 11 and a maximum of 17 maternal lines were identified based upon mitochondrial DNA restriction fragment length polymorphisms among 69 isolates of L. persoonii group 1 from one split-cultivar block of 72 trees. Vegetative compatibility loci were randomly associated with maternal lines. Evidence of clonality was absent in L. persoonii group 1, as no correlation occurred between these two sets of independent genetic markers and no genotype was over-represented. The number of cryptic species, the number of maternal lines, and the frequency of incompatibility within maternal lines indicate that considerable genetic variation exists within the Leucostoma populations in Michigan peach orchards, and that sexual recombination is common.     

不同培养基对香菇菌丝体酯酶同工酶的影响

本文应用垂直板聚丙烯酰胺凝胶电泳,对在不同培养基上生长的香菇菌丝体进行酯酶同工酶分析。结果表明,不同培养基会导致香菇菌丝体酯酶同工酶酶谱产生差异。     

桃、油桃设施栽培研究现状与展望

设施栽培已成为果树栽培学的一个重要分支,桃、油桃则被认为是最具设施栽培价值的树种之一。综述了桃、油桃设施栽培研究的历史、现状和新进展,并提出了今后研究的重点。     

南京毛刺线虫对山定子的直接致病性研究

北京南口农场山定子砧苹果树受线虫侵害严重。田间树势调查结果表明:病树长势衰退,产量降低,品质下降;补植的幼树表现出再植病症状。田间根系症状调查结果表明:病树根系生长异常,表现出典型的短粗根病症状,即受害幼根不呈延伸生长,而是在生长中不断分枝,以致最后形成须状丛簇根,每年只在新根旺长期长出一小段具有吸收功能的白色、毛笔尖状的新根。盆栽幼苗接种试验表明:南京毛刺线虫的侵染严重影响了山定子幼苗的形态建成,且使根系表现出短粗根病症状,从而证明南京毛刺线虫(Trichodorus nanjingensis Liu＆Chen)是导致该场苹果树势衰退、再植病和短粗根病的主要病原。     

多菌灵、三环唑对大丽轮枝菌微菌核、黑色素形成及致病力的影响

 在离体和活体条件下测定了多菌灵、三环唑对大丽轮枝菌的微菌核黑色素形成的影响,以及经2种杀菌剂处理产生的形态变异菌株对棉苗的致病力。结果表明:多菌灵在培养基内含量超过0.1μg/ml时,即可抑制大丽轮枝菌微菌核的形成,随着培养基内多菌灵浓度的增加,微菌核形成时间逐渐延长,形成量逐渐减少;三环唑浓度为0.5μg/ml时,可抑制微菌核的黑色素形成,微菌核从黑色变为浅红至红褐色。三环唑对微菌核黑色素形成呈可逆抑制,变色的微菌核菌落移入不含药的培养基后,大多可恢复形成黑色素。培养基内三环唑浓度的提高,也可抑制大丽轮枝菌微菌核的形成;因2种杀菌剂的抑制而丧失形成微菌核的白色菌丝体移入不含药的培养基,微菌核形成能力也不能恢复。多菌灵和三环唑经棉株吸收后均能抑制植株内大丽轮枝菌微菌核的形成,但对微菌核色素的形成未见有明显影响。2种杀菌剂处理产生的形态变异菌株的致病力与野生型菌株致病力差异不显著。     

农田黑线姬鼠发生规律与防治技术

１９８５￣１９９５年１０年监测结果表明,黑线姬鼠为浙江农田优势种,每年４￣５月和９￣１０月为繁殖高峰期,６月和１０￣１１月为数量高峰。冬前冬后密度基数,种群年龄结构,繁殖力,温度,降水,天敌和药剂防治是影响种群数量变动的主要因子及预测的依据。根据害鼠密度与稻麦为类损失率及经济允许水平,提出主害期控制的鼠密度指标为：大小麦２．７％￣４．４％,早稻４．６％￣６．７％,晚稻６．９％￣８．４％,防治指标为     

水稻白叶枯病防治技术研究

应用中国农科院最新研制的农用抗生素中生菌素研究了其对水稻白叶枯病的防治效果和应用技术。室内浸种试验表明,用中生菌素100mg/kg、在水温58℃下浸稻种48h,可全部杀死种子表面及内部的白叶枯病菌,切断了种子带菌传病的途径。田间试验表明,用中生菌素50mg/kg、水温55～60℃的药液浸种48h,再于秧苗3～4叶期和移栽前5～7d用中生菌素15mg/kg施药保护,田间白叶枯病可迟发生20d以上,其发病程度亦显著降低,对于轻病田或轻发生年份大田可免于防治;重病田或重发生年份于发病初期再用中生菌素15mg/kg防治1次,即可控制病情的发展。作者认为用中生菌素浸种及秧田期施药保护不仅改变了以往田间发病初期用药防治的策略,而且大大降低了防治费用,经济效益、社会效益及生态效益显著。