论文部分内容阅读
玉米矮花叶病是非持久性病毒——MDMV 引起。病毒介体是蚜虫,在山西省主要是麦二叉蚜(Schizaphis graminum Rond)、禾缢管蚜(Rhopalo-siphum padi Linnaeus)、玉米蚜(Rhopalosiphum maidis Fitch)、桃蚜(Myzus persicae Sulzer)和棉蚜(Aphis gossypii Glover),麦无网长管蚜[Acythosiphum dirhodum(Walker)]的传毒能力未定。实验表明,传毒蚜虫饲毒最适时间5～30分钟,接毒最适时间30～60分钟,持毒期限6～7小时,有效传毒蚜数3～5头。气温20℃麦二叉蚜的传毒效能最高,是春播玉米的主要传毒蚜虫。传毒蚜的高峰期后16～30天是发病高峰,以玉米拔节至孕穗间发病最快,抽雄后渐缓。病害的发生流行取决于毒源量、传毒蚜的虫口密度及其自然带毒率的提高,这过程进展的快慢是受时间和空间的影响。
Maize dwarf mosaic virus is a non-persistent virus caused by MDMV. The virus mediator is aphids and is mainly found in Shanxi Province mainly Schizaphis graminum Rond, Rhopalo-siphum padi Linnaeus, Rhopalosiphum maidis Fitch, Myzus persicae Sulzer and cotton Aphis gossypii Glover and Acythosiphum dirhodum (Walker) were undetermined. Experiments show that the best time to aphid poisoning poisoning 5 to 30 minutes, the most appropriate time to take drugs 30 to 60 minutes, holding the poisoning period of 6 to 7 hours, the effective number of poisoning aphids 3 to 5. Temperature 20 ℃ wheat aphides the highest transmission efficiency, is the main spring corn sowing aphids. Aphis peak after the peak of 16 to 30 days is the peak incidence of corn to join between the jointing to bustling the fastest onset, tasseling slowly. The prevalence of diseases depends on the amount of poison sources, the population density of the poisoned aphids and the increase of its natural entrapment rate. The progress of this process is affected by time and space.