转铁蛋白分型及其基因频率分布

用固相pH梯度(pH 5.05～5.60)等电聚焦技术对随机抽取的188名北京地区健康汉族人的血清转铁蛋白(Tf)进行分型调查,并统计基因频率,检出了在中国还未见报道的Tf^C3基因.其表型分别是：TfC1, TfC2, TfC1C2, TfC1C3, TfC1Dchi, TfC2Dchi.Tf^C1=0.7420, Tf^C2=0.2420, Tf^C3=0.0027, Tf^Dchi=0.0133, 符合Hardy-Weinberg定律, 并与其他已见报道的汉族 Tf基因频率大致相符.     

短尾猴种群生态学研究：Ⅲ.年龄结构和生命表

本文研究了黄山短猴（Ｍａｃａｃａ ｔｈｉｂｅｔａｎａ）种群年龄结构和雌性生命表。根据毛色、个体大小和行为等指标,可将其种群划分为６个年龄组,即婴猴组、少年组、青年组、年轻成年组、中年组和老年组。雌性短尾猴的静态生命表可较真实地反映了它在自然保护下的自下而上状况,其瞬时增长率（γ）为正值,表明只要加强对短尾猴现有栖息环境的保护,种群才会得到发展。     

精河株斑点热立克次体在非洲钝缘蜱体内的分布

本文报告用乙二醇甲基丙烯酸(GMA)包埋、切片和姬姆萨染色观察精河株斑点热立克次体在非洲钝缘蜱(Ornithodoros moubata)体内的分布情况。接种立克次体后2天,即可从蜱的血淋巴涂片中查见立克次体,但各器官和组织的切片6天后才开始出现阳性,尤以中肠最迟。叮咬感染的蜱的中肠感染较早也较严重。无论接种或叮咬感染,除睾丸和精子外,所查的器官和组织包括涎腺、基节器、中肠、直肠、卵巢以及雄蜱的附腺和贮精囊等切片中都查见立克次体。有的蜱感染很严重,立克次体充满了许多器官和组织的细胞。     

非洲钝缘蜱传播精河株斑点热立克次体的途径

非洲钝缘蜱(Ornithodoros moubata)叮咬感染精河株斑点热立克次体的豚鼠后45-52天,再叮咬正常豚鼠,可使后者感染。除个别蜱外,受精的感染雌蜱第一次产的卵(吸感染血后10—19天产出)和1龄稚蜱均为阴性。间隔.1个月又喂以正常豚鼠血,这些蜱第二次的吸血率、产卵数和卵的孵化率都明显降低,但从第二次六的卵和1龄稚蚌压印片中均查见大量立克次体。经卵传递率60%,子代感染率59%(6-100%)。     

Depolymerization of cortical microtubules is not a primary cause of chilling injury in corn (Zea mays L. cv Black Mexican Sweet) suspension culture cells

Cold-induced depolymerization of cortical microtubules were examined in suspension culture cells of corn (Zea mays L. cv Black Mexican Sweet) at various stages of chilling. In an attempt to determine whether microtubule depolymerization contributes to chilling injury, experiments were carried out with and without abscisic acid (ABA) pretreatment, since ABA reduces the severity of chilling injury in these cells. Microtubule depolymerization was detectable after 1 h at 4°C and became more extensive as the chilling was prolonged. There was little chilling injury after 1 d at 4°C in either ABA-treated or non-ABA-treated cells. After 3 d at 4°C, there was about 26% injury for ABA-treated and 40% injury for non-ABA-treated cells, as evaluated by 2,3,5-triphenyl-tetrazolium chloride reduction and by regrowth. After 1d at 4°C, less than 10% of cells retained full arrays of microtubules in both ABA-treated and non-ABA-treated cells, the remainder having either partial arrays or no microtubules. After 3d at 4°C, about 90% of cells showed complete or almost complete depolymerization of microtubules in both ABA-treated and non-ABA-treated cells. ABA did not stabilize the cortical microtubules against cold-induced depolymerization. In about 66% of ABA-treated cells and 57% of non-ABA-treated cells that had been held at 4°C for 3d, repolymerization of cortical microtubules occurred after 3h at 28°C. These results argue against the hypothesis that depolymerization of cortical microtubules is a primary cause of chilling injury.     

油松毛虫的光周期反应:温度和营养对临界光周的影响

油松毛虫Dendrolimus tabulaeformis Tsai et Liu的临界光周值,在适温区内随温度的下降而增加.不同季节和不同生长阶段的油松针叶,即营养质量不同的针叶,对油松毛虫幼虫的生长、发育和存活影响明显,从而影响着油松毛虫的光周期反应.这些结果,为油松毛虫的世代发生及种群动态的预测提供了一定的依据.     

温度对家白蚁的生存和活动的影响

家白蚁 Coptotermes formosanus Shiraki 的生存、行为和取食活动与温度密切相关。探索温度对家白蚁的生存以及行为、取食诸活动的影响,对于研究其生态学和防治学,都具有重要意义。广东省昆虫研究所对此曾进行过许多有益的研究,并作过一些有价值的报道。笔者于1986—1987年,对此问题作了系统的试验,得到一些新的结果,报道如下。     

用飞机喷洒有机磷超低容量制剂防治蝗虫

本文总结了1975—1980年在新疆巴里坤草原等地区进行的笼内药剂品种筛选试验、地面和飞机超低容量喷雾治蝗试验。结果表明:马拉松、马拉松与敌敌畏混剂、乐果、稻丰散和乙基稻丰散5种飞机超低容量制剂均可取代六六六粉剂防治各种蝗虫。每亩喷洒量为100—150克;每亩有效药量:马拉松、马拉松与敌敌畏混剂为25—45克;乐果为20—30克;稻丰散和乙基稻丰散为25—40克,蝗虫死亡率在90%以上。 使用飞机超低容量制剂治蝗具有防效好,功效高,成本低和环境污染少等优点。目前已在新疆、内蒙、青海和辽宁等省(自治区)大面积应用。累计防治面积达一千一百万亩,深受牧区群众欢迎。     

银纹夜蛾的核型多角体病毒病

银纹夜蛾(Plusia agnata Staudinger)幼虫是大豆主要食叶害虫。在泰安地区,历年约占大豆害虫总发生量的70％以上;除大豆外,还为害甘蓝、白菜、棉麻等作物。 1979年6月,发现室内饲养的银纹夜蛾幼虫有倒挂死亡的虫体,经鉴定是一种核型多角体病毒病,现将其实验结果报道如下。