七种农药对长鞘卷叶甲幼虫的毒力测定及林间防治试验

选用7种化学农药对长鞘卷叶甲2龄幼虫进行室内毒力测定,筛选出48%乐斯本乳油、4.5%高效氯氰菊酯乳油和90%杀虫单可溶性粉剂等3种农药的毒力较好,并应用于林间幼虫防治试验。试验结果表明,分别使用乐斯本、高效氯氰菊酯和杀虫单的2 000倍液进行喷雾防治效果较理想,可产生73%~85%的杀虫效果;乐斯本和高效氯氰菊酯用根灌法与注干法进行防治没有任何杀虫效果;杀虫单也能产生相对较强的杀虫效果,400倍液根灌效果为56.6%,40倍液注干效果为45.8%,可适当应用于林间防治幼虫。     

火焰原子吸收光谱分析法增感效应的研究──Ⅱ．树木叶片铜、铁元素的测定

从７种对ＣＵ、Ｆｅ元素有较大增感效应的有机物中，筛选出邻菲啉作增感剂，用于对杉木、油茶样叶中的Ｃｕ，Ｆｅ元素进行分析测定．结果表明，可使样叶中Ｃｕ，Ｆｅ元素的吸光度增加５０％左右，提高了测定的灵敏度和精度．在相关元素的测定中，除Ｃａ元素的结果表现为偏高外，对Ｋ，Ｎａ，Ｍｇ，Ｍｎ，Ｎｉ和Ｚｎ元素的测定无不良影响．     

长江流域防护林林副产品综合开发利用途径综述

本文对长江流域防护林主要构建树种的生物学特性及资源分布、主要林副产品及其用途、开发利用现状等进行了综述，旨在说明长江流域防护林的柏木、马尾松、杜仲、银杏、喜树和香樟等树种的林副产品综合开发利用有着广阔的前景和深远的意义。     

白僵菌优良菌株的选育

本研究将所收集的28个菌株,用稀释单孢分离的方法,进行生长特征、生长速度、产孢量和室内外对松毛虫致病力的测定比较,以闽林2、闽林1、闽林3号菌株表现突出,为优良菌株。     

快速测定黄姜中薯蓣皂甙元含量方法的研究

经研究将测定黄姜中薯蓣皂甙元含量的方法改进为微量浸提分光光度法。此法采用微量样品以无水酒精浸提代替传统的回流抽提法, 以香兰素-浓硫酸作显色剂, 冰醋酸作溶剂, 在460NM处测定薯蓣皂甙元的含量。与传统的重量法、抽提分光光度法相比较, 此法测定方法简便, 结果准确, 成本低, 效率高。     

日本松干蚧在山东省日照市生活历的测定

日本松干蚧于20世纪90年代初期传入日照市，对松林造成严重危害，赤松濒临灭绝。为更好开展科学防治，从2000年开始对该虫进行系统虫情调查，通过设立固定标准地，对日本松干蚧越冬代和越夏代各虫态进行系统观测，确定了其在日照地区的生活历，填补了日本松干蚧发生发展规律在该地域的空白，对指导该地区开展科学防治具有重要意义。     

烟雾机性能参数虚拟测试系统及网络化设计

通过对原有烟雾机性能参数测试手段的改进并完善，设计和开发了基于虚拟仪器技术的烟雾机性能参数测试系统，提出了烟雾机性能参数网络测试系统的设计方法。系统充分利用计算机高速、准确的特性。汲取互联网技术方便、连通的优点，以图形化编程语言LabVIEW和个人计算机为软硬件平台，实现多通道信号的计算机采集与分析功能，简化仪器设备，提高测试效率。     

人造板游离甲醛释放量测定的主要影响因素的研究

试验表明，人造板在存放过程中，板材的游离甲醛释放量逐渐下降并趋于稳定。在测定中的萃取时间、样品大小、甲苯的重复使用对测定结果都有一定的影响。     

Sur un cas de variabilité chez Sphaeropsis sapinea

A case of variability in Sphaero sis sapinea . Two isolates (type I and type II) of Sphaeropsis sqinea were isolated from the co lar of a declining Cedrus deo daa in the South of France. Cultural characteristics on PDA and MEA as well as conidial dimensions were compared with those of types A and B of S. sapinea described to occur in North America. Type II was similar to type A in respect to cultural aspects and growth but distinctly different in conidial dimensions. Slower growing type I was similar to type B. However, type I grew faster on PDA, had smaller conidia and lacked microconidia. Single-conidia isolates obtained from the four types showed stability of these characteristics.     

Simultaneous determination of Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) with a single sweep polarography

A new method of simultaneous determining Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) with a single sweep polarography was developed. The experiment condition was studied and the results show that the optimum base solution is that the residue got from evaporating 25 mL mixed solution, 2.5 mL 1.0 mol/L ethylenediamine, 3.0 mL 1.0 mol/L ammonia-ammonium chloride, 5.0 mL 10 % sodium sulfite and 0.5 mL 0.5 % gelatin were mixed and diluted to 25 mL with water. Under the condition of this base solution, the polarography wave shapes of the six cations are ideal and without overlap of the peaks. In this base solution, Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) in synthetic samples were determined with relative errors 0.4–9.4% and relative standard deviations 0.8%-12.2%. Under this experiment condition, one fold of Pb(II), Cr(VI) and Mo(VI) do not interfere with the determination for Cu(II). This method has been used to the simultaneous determination of the amount of the six cations in the samples of soil and Beiqi Tea. The relative standard deviations were 0. l%-2.1% and recoveries were 93.5%-99.0 %.