摘要
本文报道了内蒙古南部地区马铃薯传毒蚜虫的迁飞消长规律、病毒种类及其田间扩散,并以7个脱毒品种和7个未脱毒品种在自然条件下连续种植3年的感病情况和产量等性状的变化研究了该地病毒病对马铃薯的危害。结果表明,平均每年累积迁来有翅蚜3072头/百株,其中桃蚜为16.6%;7月上旬累积无翅蚜每百株7000多头。侵染马铃薯的病毒、类病毒和类菌原体等病源达10种之多;植株感病速度极快,且多被复合侵染,田间花叶、卷叶和束顶类型的病情指数在50%以上;7个脱毒品种亩产逐年递减448.3～1469.1公斤,同时还发现在其产量显降前有2年左右的潜伏期,随后急剧下降,最后保持在一个基本恒定的低水平。
This paper reported the migration,growth and decline of aphids spread-ing potato viruses,kinds of viruses and their field proliferation in Huhehaote,China.The activity of aphids is usually frequent in this region.Sevenvirus-free potato variefies and seven virus-infected varieties were plantedfor three years in succession under natural conditions.The results showedthat there were 3072 aphids that migrated to every 100 plants in a year,16.6% of which were Myzus persicae.The accumulative total was more than7000wingless aphids on every 100 plants in the first ten days of July.Viruses,viroids and mycoplasmas-like bodies infecting potatoes totaled as many as 10kinds.Infected degree index of mosiac,leaf-roll and other types of virusdiseases in the fields amounted to over 50%.The plants were often infectedby several kinds of viruses.The yield of the 7 virus-free potato varietieswas reduced by 448.3～1469.1kg/mu per year.It was discovered that therewas an incubation period of about 2 years before the sharp decline of yield.Then after the sharp decline the yield remained constantly low.
出处
《马铃薯杂志》
1991年第1期18-24,共7页
Chinese Potato Journal
