鱼腥草主要病虫害调查方法与综合防治标准操作规程

摘 要：该文简述了鱼腥草主要病虫害种类,形态和症状及识别方法,提出了相应的调查取样方法和分级标准。根据鱼腥草主要病虫害的发生规律,参照《国家绿色食品A级农药施用标准》和《中药材生产质量管理规范(试行)》等条例的规定,归纳了一套鱼腥草病虫害防治标准操作规程,为鱼腥草GAP标准化生产提供了保障。     

浙江衢州毛竹林低改后害虫种群变动分析

自20世纪80年代始,衢州市各县(市、区)逐渐推广毛竹低产林改造技术,为竹林增产增效打下了基础。但是,由于改制后的毛竹林地被挖锄,天敌资源锐减,竹林中年年有笋,立竹上终年披叶,使竹子害虫食物条件改善,致使竹子害虫种类、数量增加,危害逐年加重。通过害虫种群变动分析,可以为开展竹林病虫害综合防治提供有效的应对措施。     

生态设计与生态旅游的关系初探

阐述了生态设计与生态旅游的基本概念,并从景观生态学的角度入手,探究了生态设计与生态旅游的关系,并展望了生态旅游的发展前景。     

生态学理论在城市园林绿化中的应用研究

本文从人与自然和谐共处、可持续发展的角度出发,以生态学理论框架为依托,系统地总结了在城市园林建设中生态学理念的渗透及运用,为城市生态园林设计提供了理论指导和设计参考,同时得出我国生态园林的下一步工作重点要放在恢复生态学的应用上,并且要实现现代城市生态园林的建设要多学科、多角度共同协作的结论。     

桉树害虫的检疫

桉树（Ｅｕｃａｌｙｐｔｕｓｓｐｐ．）原产于澳大利亚、巴布亚新几内亚、印度尼西亚。桉树具有生长快、适应性强、用途广等特性,普遍受到人们的青睐,全世界已有９０多个国家引种了桉树,我国引种桉树已有１００多年的历史［１］。１９８５年,我国与澳大利亚合作研究桉树的栽培与利用后［２］,桉树在我国的营造面积迅速扩大,１９８８年桉树面积为４０万ｈｍ２,１９９８年达６０万ｈｍ２。随着桉树纯林面积的不断扩大,一些引种桉树历史较久的地区,其虫害问题日益突出。广东为我国南方的门户,国际交往频繁,对防止危险性害虫的入侵具…     

Breeding alfalfa cultivars resistant to the alfalfa weevil

A ten-year study consisting of nine field experiments was conducted to evaluate alfalfa (Medicago sativa L.) for resistance to larval feeding by the alfalfa weevil (Hypera postica Gyllenhal). The results were consistent over years and experiments. Only one source of alfalfa germplasm, designated Starnes, showed resistance to larval feeding in the field under natural infestations of the weevil. The cultivars Team, Arc, and Liberty have been developed from this germplasm source. The only effective method of selection for field resistance to the weevil was field selection under natural weevil infestations. Selection was based on low larval feeding on spaced plants. After six generations of such selection the Starnes germplasm showed only one-third as much defoliation as did the check cultivars. The heritability of the weevil resistance was moderately high. Field resistance was transferred to other strains through hybridization; hybrids were intermediate to the resistant and susceptible parents. Resistance was stable.Laboratory and greenhouse efforts to breed alfalfa weevil resistant alfalfa-using such techniques as adult cotyledon-nonpreference tests, adult leaf-feeding tests, larval-growth and survival tests, oviposition-stimulus tests, and oviposition-nonpreference tests-have failed to produce field resistance.Paper No. 5308 of the Journal series of North Carolina Agricultural Experiment Station, Raleigh, N. C., in cooperation wich ARS, USDA. Received 15 June 1977.     

水稻病虫为害损失试验初报

本文探讨了测算水稻病虫为害总损失、虫害损失、病害损失、挽回损失和实际损失等五组数据的田间试验设计和方法，并以此来评估水稻病虫为害损失情况，同时分析造成为害损失的病虫主次。     

沂蒙山区杞柳害虫记述

近4年来的研究，记载了为害沂蒙山区杞柳的害虫（害螨），共计115种，分属于昆虫纲和蛛形钢，6目，31科。     

黑龙江省西部柠条的栽培技术及生态价值

根据我省西部的特点,论述了发展和种植柠条是我省西部造林的先锋树种,并介绍了柠条栽培技术的方法和生态及经济价值.     

26种昆虫体内的1-脱氧野尻霉素含量测定

为发掘新的富含1-脱氧野尻霉素(DNJ)的昆虫资源,共测定了26种昆虫体内的DNJ含量。除家蚕(Bombyxmori)之外,野桑蚕(Bombyx mandarina)、桑蟥(Rondotia menciana)、桑尺蠖(Phthonandria atrineata)、桑螟(Diaphaniapyloalis)等4种仅取食桑叶的单食性或寡食性昆虫也富含DNJ,其中桑蟥和桑尺蠖幼虫中的DNJ质量分数分别为1.0648%±0.1134%、0.5138%±0.0083%,高于家蚕幼虫中的DNJ含量(0.4238%±0.0108%),并且桑尺蠖春季越冬代幼虫及其室内桑叶饲育的第1代幼虫和蛹、成虫均含有DNJ,具有开发利用价值。从桑园采集的兼性食桑昆虫中,人纹污灯蛾(Spilarectia subcarnea)、美国白蛾(Hlyphantria cunea)、大造桥虫(Ascotissele naria)、黄斑星天牛(Anoplophora nobilis)等4种昆虫的幼虫中含有微量DNJ,而褶翅尺蠖(Zamacra excauvata)、枣尺蠖(Sucra jujuba)、桑毛虫(Euproctis similis xanthocampa)幼虫和桑天牛(Apriona ger-mari)成虫中不含DNJ。豆天蛾幼虫(Clanis bilineata)等13种非食桑昆虫体内均不含DNJ。研究结果也提示取食桑叶的昆虫对DNJ的富集能力存在很大差异。