Sogalabana ochracea gen. et sp. nov. from Tsaratanana massif in northern Madagascar (Hemiptera: Fulgoromorpha: Flatidae)

The paper describes a new flatid genus, Sogalabana gen. nov., and a new species Sogalabana ochracea sp. nov. from Madagascar. Illustrations of the female internal genital structures are provided.

htpp://zoobank.org/urn:lsid:zoobank.org:act:CF80D959-FB22-4EDB-A2BA-A1628ABF9C15     

Effects of feeding on healthy and diseased corn plants on a vector and on a non-vector insect

Insect-transmitted plant pathogens can have positive, negative or no effects on the vector insect. Effects could be direct (caused by the pathogen) or indirect (mediated by changes in the plant). Pathogen effects on non-vector insects are less well known.Peregrinus maidis (Ashmead) (Homoptera: Delphacidae), an insect that is not a vector of the corn stunt spiroplasma (CSS), weighed less 15 days after feeding on CSS-infected corn plants relative to insects feeding on healthy corn plants. Fecundity of non-vector insects that were removed from diseased plants was higher than for insects coming from healthy plants. ForDalbulus maidis (DeLong & Wolcott) (Homoptera: Cicadellidae), an insect that transmits CSS, there were no differences in weight, longevity, eggs per day, weekly or total fecundity after feeding on healthy or on CSS-infected corn plants. Significant differences in some phloem amino acids were detected between healthy and CSS-infected plants. Infected plants also showed an increased phloem acidity as disease symptoms progressed. Feeding on CSS-infected corn plants by an insect that does not vector the pathogen infecting the plant can have favorable consequences as evidenced by an increased fecundity.Scientific aritcle no. 8819, contribution no. A-6605 of the Maryland Agricultural Experiment Station.     

A cavernicolous planthopper in the Galápagos Islands (Homoptera: Auchenorrhyncha: Cixiidae)

A new troglobitic cixiid species, Oliarus hernandezi sp. n. is described from three lava tubes on the island of Floreana, Galápagos group. It is the first known obligately cavernicolous planthopper species from Galápagos. Notes on its ecology and distribution are given, and phylogenetic relationships to epigean Oliarus species from Galápagos are discussed.     

基于WebGIS的稻飞虱灾害预警系统初步研究

以ArcGIS8.1系列作为组建WebGIS数据库及进行时空分析的基本软件平台,介绍了WebGIS的工作原理、技术支持标准、体系结构和数据库建库的方法.根据稻飞虱历史资料,分别建立了空间及属性数据库,应用该数据库可以对稻飞虱种群动态进行时空分析.最后给出了广东省稻飞虱灾害预警信息系统的初步应用实例.