Manurung B, Witsack W, Mehner S, Grüntzig M, Fuchs E
Institute of Zoology, Martin-Luther-University Halle-Wittenberg, 06099 Halle (Saale), Germany.
Virus Res. 2004 Mar;100(1):109-13. doi: 10.1016/j.virusres.2003.12.019.
Occurrence of the leafhopper Psammotettix alienus Dahlb. and its infectivity with Wheat dwarf virus (WDV) were studied in cereal crops in Saxony-Anhalt (Middle-Germany) in 2000 and 2001. The leafhoppers were collected with a sweep net and/or a cage trap and their WDV infectivity was determined by transmission to test plants. In 2000, adult leafhoppers were caught from the second week of May to the third week of December, whereas in 2001 they were trapped from the fourth week of May to the second week of December. Nymphs and adults were caught in spring in young actively growing crops and in summer in maturing crops and also in self-sown cereal stands. However, only adults were found in autumn in newly sown crops. The peak population density of adult leafhoppers was in self-sown cereal plants in September when there were 25 individuals per m(2) in 2000 and 15 in 2001. The proportion of leafhoppers that were infective with WDV when transferred to barley test plants ranged from 5 to 79% in 2000 and from 0 to 56% in 2001. Two leafhoppers collected in June 2000 in a crop of maturing winter barley each infected both barley and wheat plants with WDV. It is concluded that the same leafhoppers are able to acquire both virus strains and transmit them to cereals.
2000年和2001年，在德国中部的萨克森-安哈尔特州的谷类作物中，对异沙叶蝉（Psammotettix alienus Dahlb.）的发生情况及其感染小麦矮缩病毒（WDV）的情况进行了研究。用扫网和/或诱捕笼收集叶蝉，并通过将其接种到试验植物上来测定它们对WDV的感染性。2000年，从5月的第二周至12月的第三周捕获成年叶蝉，而在2001年，从5月的第四周至12月的第二周诱捕叶蝉。若虫和成虫在春季于生长旺盛的幼嫩作物中捕获，夏季在成熟作物中捕获，也在自生谷类作物田中捕获。然而，秋季仅在新播种作物中发现成虫。成年叶蝉的种群密度峰值出现在9月的自生谷类作物中，2000年每平方米有25只，2001年有15只。转移到大麦试验植物上时感染WDV的叶蝉比例在2000年为5%至79%，在2001年为0至56%。2000年6月在一片成熟冬大麦作物中采集的两只叶蝉，分别使大麦和小麦植株感染了WDV。得出的结论是，同一批叶蝉能够获取两种病毒株并将它们传播给谷类作物。
