砻糠载体不均匀施药技术的研究

选择多种物料作为防护剂载体,以马拉硫磷10ppm处理玉米象,以砻糠效果最好,其次按顺序为小麦、聚乙烯树酯、毛竹、天竺竹、松木、梓木、聚氯乙烯树酯。砻糠载体法比常规的喷雾法或药谷法对玉米象和谷蠹效果好。在粮食中残留始终很低。同时发现粮层厚度30厘米以内间隔施药药效好。生产性试验表明随粮食边入库边撒药糠的不均匀施药法是可行的,革除了旧法施药后彻底搅拌粮食的笨重体力劳动,提高了施药和食用安全程度。     

雄蚕杂交种的应用研究

总结了4年8个蚕期利用家蚕性连锁平衡致死第转育改良组配成的7对雄蚕杂交组合的饲养试验。结果表明雄蚕杂交种具有食桑省、叶丝转化率高、能够大幅度提高蚕出丝率、茧丝质量优异等优点，具有广阔的推广应用前景，对于改造提升传统蚕丝业具有重要意义。     

鸭瘟混感大肠杆菌病的诊治

１发病情况上海市郊区某鸭场有多年的养鸭历史，年饲养肉鸭６万羽左右。自开始养鸭以来，一直在同一水面上饲养，养鸭环境卫生不佳，病鸭与健康鸭隔离不严，以致鸭群经常发病。１９９９年１２月，饲养的５０００多羽肉鸭陆续死亡。畜主曾用青霉素、链霉素等治疗，病情未见好转。２症状病鸭临床上表现为精神沉郁，头颈缩起，羽毛松乱，食欲减退或废绝，喜饮水，站立困难，不愿走动，体温升高，呼吸困难，流泪，上睑水肿，有些病鸭出现单侧或双侧失眠。部分病鸭头颈肿胀，排绿色或灰白色稀粪。３剖检变化剖解病鸭４羽。单侧眼失眠（２／４），…     

蚕沙中黄酮类化合物的提取工艺

采用L9(3^4)正交试验设计对浙江海宁蚕沙中黄酮类化合物的热回流提取工艺进行了优化，所得出最佳工艺条件为；乙醇浓度为30％，料液比1：30，提取时间3h。     

水稻品种试验小区边际效应及其对试验准确度的影响

本文对水稻品种试验的小区边际效应作了初步的研究,结果表明:不同品种小区边行植株的穗数、实粒数、千粒重、产量等均有明显的优势;边行优势穗数平均达21.84%,每穗实粒数平均达15.69%,千粒重平均达3.86%,实产量平均达48.44%;边行优势具有显著的品种间差异性;这种差异性致使试验准确度受到一定影响,二种计产方法(以全小区计产和剔除边际效应后的计产)的品种产量位序相关系数仅为0.6929;边际效应在试验过程中应予以消除。     

跗线螨属一新种(螨目 跗线螨科)

本文描述跗线螨属一新种,新种Tarsonemus kropf与T.schlechtendali Suski1966很相似,但其Ta毛生于表皮内突Ⅰ上或紧靠其下;3b毛生于表皮内突Ⅳ的下端;背面e毛长于f毛;前中表皮内突与表皮内突Ⅱ相接。模式标本分别存放于甘肃农业大学植保系和德国联邦农林生物研究中心葡萄保护研究所。     

Induced transplacental transmission of Neospora caninum in cattle.

Three Jersey cows were inoculated SC and IM with 26 million Neospora caninum tachyzoites at 129 (cow 1), 126 (cow 2), and 81 (cow 3) days after mating. Cows remained clinically normal for at least 1 month after inoculation of N caninum. Cow 1 was euthanatized 32 days after inoculation because of gangrenous mastitis. Cow 1 had a live fetus with no gross lesions; however, microscopic lesions were seen in the fetus and consisted of severe nonsuppurative necrotizing encephalitis of the cerebral white matter. Neospora caninum was identified in lesions by staining with anti-N caninum serum in an immunohistochemical test, by bioassays in mice, and by inoculation of bovine monocyte cultures with fetal tissue homogenate. Neither N caninum nor lesions were associated with infection with the protozoon identified in tissues of cow 1. Cows 2 and 3 aborted small autolysed fetuses 101 and 74 days, respectively, after inoculation with N caninum; the fetuses and attached placenta were unsuitable for laboratory investigations. Cows 2 and 3 remained clinically normal 4 months after abortion. Results of this study indicated that N caninum can be transmitted transplacentally in cattle.     

杨树栅锈菌Melampsora spp的数量分类研究

栅锈菌种Melampsora spp.的分类过去主要根据其寄主、转主寄主范围及冬孢子形态特征;但用这个原则对杨树上栅锈菌分类是很困难的。因为:1.冬孢子的相似性,大部分杨树栅锈菌的冬孢子在形态上区别不显著;2.多寄主性;3.交叉发生性;一种杨树甚至同一棵树上能同时有两种栅锈菌存在;4.缺转主寄主性;即有些杨树栅锈菌不经转主寄主而完成生活史;5.强制接种可以使非寄主植物发病。由于分类中遇到的上述困难,使杨树栅锈菌的分类转向了夏孢子阶段的性状。Kraa-