宜昌市的黄胸散白蚁及其防治

黄胸散白蚁 Reticulitermes flaviceps (Oshima)对建筑物的危害,在宜昌市仅次于家白蚁。几年来,我们在防治家白蚁的同时,对黄胸散白蚁也进行了一些观察和防治工作,摸索了一些经验。现将其为害情况、分群活动及防治体会整理如下。     

用低放射性强度131I与198Au标记家白蚁的试验

近十多年来,利用放射性同位素~(131)I、~(198)Au标记法研究白蚁的活动规律、危害范围以及示踪探巢等多有报道,但一般使用的放射性强度比较大,为数个至十多个毫居里(mc),弊病较多。为此开展了用低放射性强度微居里(μc)级的~(131)I和~(198)Au标记家白蚁(Coptotermes formosanus Shiraki)的试验研究。结果表明,使用放射性同位素~(131)I和~(198)Au5O—150μc标记诱集箱内的白蚁,即可达到上述研究和防治家白蚁的目的。     

合肥地区白蚁危害及其防治的研究

白蚁是世界性公害之一。本文首次提出报道自７０年代以来对合肥市白蚁分布,危害状况进行了长期采样,鉴定并着手防治研究,换回了消失,取得显著成效,查明合肥地区白蚁有２科３属９种;摸清白蚁在该地区分布规律及传播途径,其主要危害种为普见家白蚁,圆唇散白蚁和黑胸散白蚁三种。     

水库堤坝白蚁的防治研究

本工作是根据水库堤坝的生态环境特点,研究土牺白蚁中黑翅土白蚁[Odontotermes(O.)formosantts(Shiraki)]和黄翅大白蚁(Macrotermes barneyi Light)的分布情况、活动规律和防治措施,其中包括以黑光灯诱杀成虫和药剂灌巢。     

湘潭市白蚁防治研究初探

湘潭市是湖南省白蚁危害地区之一。通过调查,我市发现白蚁近４０种,造成直接经济损失５００多万元,现就近几年在白蚁防治方面所做的研究整理如下。１白蚁防治调查１．１不同药剂诱杀家白蚁的防治效果用白蚁喜食的材料做成诱杀箱,埋放在白蚁经常出没的地方,待诱集到一定数量的白蚁后,用灭蚁灵粉剂或砒粉剂喷杀,其防治效果见表１。１．２不同药剂防治散白蚁的防治效果用氯丹、溴氰菊酯、砷铜合剂全面喷洒蚁害活动区,或用灭蚁灵剂喷入分飞孔内及对危害区域多点喷施,其防治效果见表２。１．３不同药剂防治土栖白蚁的防治效果用氯丹、溴…     

微生物防治家白蚁的室内试验效果

利用微生物防治白蚁的研究,国外已经进行了二十多年,但至今未见有关微生物防治家白蚁Coptotermes formosanus Shiraki取得满意效果的研究报告。本研究目的是克服使用化学药剂对人畜有毒、造成环境污染以及对地下巢和树巢效果不好等缺点。 几年来,我们筛选过102株菌种。对家白蚁致病力高的菌种有从死家白蚁巢叶分离出的黄曲霉~(**)Aspergillus flavus Link和从松毛虫尸     

对挖巢方法消灭家白蚁(Coptotermes formosanus Shiraki)的商榷

一、前言 挖巢消灭家白蚁,是我国民间传统性防治白蚁方法之一。我国防治白蚁的主要方法大致分为浙江方法和广东方法:浙江法以掘取蚁巢而闻名,广东法则以利用砷素剂等化学药品防治为特长。例如浙江省东阳和义乌一带,有不少包治白蚁的土专家,这些土专家每当冬季,常串乡执旗“包捉白蚁”等字样。解放初期仅浙江东阳一县仍留有七、八家专治白蚁的土专家,他们都是以挖巢为主要方法消灭家白蚁的(据蔡邦华报导)。     

湖北地区家白蚁Coptotermes formosanus Shiraki移殖飞翔条件的初步探讨

移殖飞翔是白蚁传播的主要方法,正确掌握它的出飞条件、规律,在防治实践上有相当大的意义。目前由于各地气候不同,对家白蚁分群时间各说不一。历年来我在防治白蚁工作中,初步进行了一些观察,提出供大家参考。 一.繁殖蚁在出巢前的情况 湖北省一年四季有明显的温差。白蚁活动规律民间有“来得明(清明节)”,“去得白(白露节)”的说法。每年11月到次年3月中旬是白蚁越冬归巢集结时期。巢内温度虽在“数九寒冬”还是很高的。气温16℃时,     

桂林植物园主要病虫害的发生及防治

本文报道了桂林植物园主要病虫害桂花叶蜂、台湾草夜蛾、广西灰象、黄点介壳虫、家白蚁、煤烟病、叶枯病和炭疽病的发生规律和防治技术。     

家白蚁长翅生殖型的发育

长翅生殖型是家白蚁Coptotermesformo－sanusShiraki巢群的重要组成部分,是家白蚁种群扩大为害区域,延续、发展的主要品级。研究其发育特点,是家白蚁生物学的重要内容,且有助于提高防治水平和效果。！研究方法直接解剖家白蚁大小奥比三OO多个及1000多个活动点,观察一年内每日长翅生殖型在巢内的分布及发育情况。在家白蚁的分飞期,对长翅成虫进行人工配对,对其初建群体观察其产卵和孵化情况,研究其卵期和幼中期的发言。系统测量矛日以的巢温,共测量活单几十个,取得巢温数据两万多个（其中对7个奥进行了两年系统测量）。从家白蚁…     

ON THE EXISTENCE OF A Go-PHASE IN THE CELL CYCLE

The model is based on the assumption that the cell cycle contains a G_o-phase which cells leave randomly with a constant probability per unit time, γ. After leaving the G_o-phase, the cells enter the C-phase which ends with cell division. The C-phase and its constituent phases, the‘true’G₁-phase, the S-phase, the G₂-phase and mitosis are assumed to have constant durations of T, T₁T_s, T₂ and T_m, respectively. For renewal tissue it is assumed that the probability per unit time of being lost from the population is a constant for all cells irrespective of their position in the cycle. The labelled mitosis curve and labelling index for continuous labelling are derived in terms of γ, T, and T_s. The model generates labelled mitosis curves which damp quickly and reach a constant value of twice the initial labelling index, if the mean duration of the G_o-phase is sufficiently long. It is shown that the predicted labelled mitosis and continuous labelling curves agree reasonably well with the experimental curves for the hamster cheek pouch if T has a value of about 60 hr. Data are presented for the rat dorsal epidermis which support the assumption that there is a constant probability per unit time of a cell being released from the Go-phase.     

西伯利亚鲟幼鱼骨骼系统解剖研究

为了解西伯利亚鲟(Acipenser baeri)骨骼系统的形态特征, 采用传统的解剖法和透明骨法对西伯利亚鲟幼鱼进行解剖观察, 为西伯利亚鲟在形态学和分类学的研究提供基础资料。结果表明: 西伯利亚鲟幼鱼骨骼系统由主轴骨骼和附肢骨骼两部分构成, 主轴骨骼包括头骨、脊柱和肋骨, 附肢骨骼由鳍条、支鳍骨骼和带骨构成。对比分析发现, 西伯利亚鲟和施氏鲟骨骼系统的组成与构造较为相似, 其原因可能是其对高纬度低水温环境长期适应的结果。     

铁/紫膜/胶/铜光电池在光触发瞬时的界面电势研究

在分析菌紫质光驱质子泵过程的基础上 ,应用Hong的化学电容的概念 ,提出在菌紫质人工膜系统中等效存在C -电容和N -电容 ,并由此研究了铁/紫膜/胶/铜光电池在光触发瞬时的界面电势。结果可提供于以菌紫质为基础的分子电子器件 ,和菌紫质光驱质子泵机理的研究。     

THE EFFECT OF MODERATE AND MARKED HYPERCAPNIA UPON THE ENERGY STATE AND UPON THE CYTOPLASMIC NADH/NAD+ RATIO OF THE RAT BRAIN

Abstract— The energy state of brain tissue was evaluated from the tissue concentrations of ATP, ADP and AMP and the cytoplasmic NADH/NAD⁺ ratio from the tissue, CSF and blood concentrations of lactate and pyruvate, and from the intracellular pH', in rats exposed to carbon dioxide concentrations of 640 per cent. The hypercapnia had no significant effect on the energy state of the tissue. Hypercapnia of increasing severity gave rise to a progressive decrease in the pyruvate concentration; the lactate concentration fell at low CO₂ concentrations, but no further decrease was observed at CO₂ concentrations greater than 20 per cent. There was a progressive rise in the intracellular lactate/pyruvate ratio at increasing CO₂ concentrations, corresponding to the fall in intracellular pH, i.e. the calculated NADH/NAD⁺ ratios remained normal. It is therefore concluded that hypercapnia does not affect the cytoplasmic redox state.     

A STUDY ON THE RELATIONSHIP BETWEEN THE QUANTITY OF HONEYDEW AND THE rmOF GREEN PEACH APHID

Abstract Experiments were carried out to study the relationship between the quantity of honeydew and r_mof green peach aphid infesting 50 tobacco varieties in the field from 1990 to 1992. The results showed that the range for r_m is from 0.102 to 0.498, for honeydew secreted during 24 hours is 3.862 mm²/aphid to 29. 356 mm²/aphid. It also showed that the resistance of tobacco varieties to green peach aphid manifested in the reduction of net reproductive rate. Both r_m and honeydew had significant relations to the population of green peach aphid in the field, and therefore the quantity of honeydew can be used as an index in determination of tobacco resistance to green peach aphid.