HPLC法测定不同时期鲜枣中环磷酸腺苷含量变化的研究

研究不同时期鲜枣中环磷酸腺苷(cAMP)含量的变化,为后期开发枣酒等功能产品提供理论依据。采用高效液相色谱法,对不同品种鲜枣的3个时期(白熟期、半红期、全红期)的功能性物质cAMP含量进行测定。研究表明,板枣、壶瓶枣、木枣3个枣品种中木枣的环磷酸腺苷含量最高;白熟、半红、全红3个时期中白熟期环磷酸腺苷含量最高。可以选择合适的采摘时期提取有效成分,以加工后续功能产品。     

沧州市新选育的枣树优良品种及发展意见

介绍了沧州市近几年选育的金丝小枣、无核枣、鲜食枣3个系列8个枣树优良品种，并对今后的推广工作提出了建议。     

橡胶小蠹虫的危害和防治

描述为害橡胶树的小蠹虫如角面长小蠹、小杯长小蠹、锥尾长小蠹、对粒材小蠹、橡胶肩角粉蠹、短鞘长腹筒蠹等的形态特征、生物学特性，提出防治方法。     

咖啡蚧虫的生物防治和云南咖啡害虫综合治理浅见

文章综述了咖啡蚧虫的种类、为害及其生物防治方法，分析了影响生物防治的因素和发展趋势，提出了开展云南咖啡害虫综合治理研究的建议。     

Relationships between the number of dwarf shoots of<Emphasis Type="Italic"> Larix decidua</Emphasis> Mill. damaged by different insect species in the Ojców National Park in southern Poland

A study was conducted on the interrelationships between the number of dwarf shoots of Larix decidua Mill. damaged by insects: Adelges laricis Vall. Coleophora laricella Hbn., Spilonota laricana Hein. and Dasineura kellneri (Hensch.). The study made use of dwarf shoots collected at three sites in the Ojców National Park, southern Poland during 2002–2003. A total of 240 branches with 19,239 dwarf shoots, collected from 60 larches were designated to the study. The data obtained were subjected to statistical analysis using the Spearman rank correlation coefficient and the Students t-test at the 0.05 level. No unequivocal correlation was found between the relationships.     

青藏高原东南缘甘孜州青极组杨树病虫调查

1994年-1996年三年时间，对甘孜州现有10种1变种青杨组杨树病虫进行了调查，经整理、鉴定出主要病害29种，虫害24种，病虫天敌10类，属国家发布的森林植物检疫对象2种。分析了主要病虫害发生特点。     

The simplification of traditional vineyard based agroforests in northwestern Portugal: some ecological implications

In northwestern Portugal, peasants have developed complex vineyard (Vitis vinifera) systems comprising agroforests composed of host trees, vines, annual crops and in some cases animals. Until recently these vineyards suffered very few pest problems and received relatively low pesticide loads. In the last few years, new policy and market forces have prompted the conversion of many of these systems to monoculture thereby decreasing the biodiversity inherent to traditional vineyards. Many scientists are concerned that with accelerating rates of vineyard simplification insect pest and disease problems may increase due to lack of habitat and resources for natural enemies or to a concentration of preferred host plants for specific pathogens and herbivores. During the growing seasons of 1997 and 1999 we conducted several farm surveys of traditional agroforestry and modernized, monoculture farms. We conducted field measurements to elucidate trends in insect pest and disease incidence in both types of vineyards. Our surveys revealed that monoculture vineyards exhibited lower number of species of predators and parasites and correspondingly higher densities of two grape herbivores (Lobesia botrana and Empoasca vitis) than diverse vineyard agroforests. Botrytis bunch rot seemed more prevalent in the monoculture systems, which also received increased fungicide applications when compared to the traditional vineyards. Although preliminary, our studies suggest that new vineyard designs may be more productive, but such gains occur at the expense of biodiversity and agricultural sustainability, reflected on higher pest vulnerability. Further agroecological studies are needed to account for the full ecological costs of the modernization of traditional vineyard agroforests.This revised version was published online in November 2005 with corrections to the Cover Date.     

桥山油松良种基地结实与球果害虫防治

本文对影响双龙油松良种基地及采种基地油松种子产量的林分分布、坡向、林分密度、种实害虫等因素进行了调查分析,并提出了相应的对策.     

四川退耕还林区竹类病虫害的控制途径

在四川退耕还林区，由于竹类结构单一，加之管理不美，普遍存在“重栽培，轻保护”的认识，尽管全省竹林面积发展迅速，而竹类病虫害也随之呈蔓延之势，在某些地区已成为制约其发展的重要因素，笔者在研究四川省竹类病虫害发生及危害特点的基础上，对其成因进行了分析，探索了竹类病虫害的控制途径。提出在竹类病虫防治策略上可分为预防和防治两部分，预防是主体，是防治的前提，防治是预防的继续，防、治、兼备；在病虫防治布局上，逐步实行竹苗检疫化、品种抗性化和测报系统化，达到有效地控制竹类病虫灾害的目的。     

贵州米槁的栽培与病虫害防治技术

米槁是贵州省名贵中药材之一，其应用广泛，功效奇特。米槁资源市场紧俏，人工栽培市场前景看好。详细叙述其良种采集、苗木繁殖、植苗造林、果实的采收与加工等人工栽培技术。介绍了5种病害和2种虫害的防治技术。提出加强基础研究，扩大种苗繁殖，实行开发与保护相结合等扩大米槁资源的对策措施。