从玉米粗缩病的发生分布、病症特征、病原、寄主范围、传播方式和特点、流行规律、品种抗病性等方面回顾玉米粗缩病研究的历史和现状,分析探讨存在的问题和对策。引起玉米粗缩病的病原有Maize rough dwarfvirus(MRDV)、Rice black strea...从玉米粗缩病的发生分布、病症特征、病原、寄主范围、传播方式和特点、流行规律、品种抗病性等方面回顾玉米粗缩病研究的历史和现状,分析探讨存在的问题和对策。引起玉米粗缩病的病原有Maize rough dwarfvirus(MRDV)、Rice black streaked dwarfvirus(RBSDV)和Mal de Río Cuarto virus(MRCV),在我国流行的是RBSDV,主要依靠Laodelphax striatellus传播。间作套种尤其是麦/玉米种植模式与玉米粗缩病暴发流行密切相关,主要是为病毒和传毒介体提供了栖息繁衍环境和循环寄主。目前玉米粗缩病抗性种质资源缺乏,应用的防治技术还不能满足生产上的需求。协调高效的种植模式(间套种)与防病需求之间的关系,研发简便、实用、高效的防病治病措施,抗玉米粗缩病种质资源的创新是生产上需要解决的问题。展开更多
Maize rough dwarf disease (MRDD) is a viral disease that is widely distributed in the world and causes great losses in grain yield. During the past three decades, considerable progress has been made in the
Four isolates of Rice black-streaked dwarf virus(RBSDV)were collected from the maize plants showing rough dwarf symptom in Linyi and Tai’an,Shandong province.The S10 genomic sequences of these isolates were determine...Four isolates of Rice black-streaked dwarf virus(RBSDV)were collected from the maize plants showing rough dwarf symptom in Linyi and Tai’an,Shandong province.The S10 genomic sequences of these isolates were determined and compared with those of 14 other RBSDV isolates.All of the four sequences were 1 801 base pairs(bp)long including the 5’-UTR of 21 bp and the 3’-UTR of 103 bp.They all contained an open reading frame of 1 677 bp(22-1698),encoding the coat protein(CP)of 558 amino acids.The sequences of these four RBSDV isolates and those of the major cp gene of 14 other isolates available in the GenBank were divided into two groups in the phylogenetic tree.Recombination analysis indicated that the isolate Lym2 was likely a recombinant of isolates Lym1 and Zhjs.展开更多
通过田间大田试验比较了不同制剂用量30%噻虫嗪悬浮种衣剂对玉米田灰飞虱及粗缩病的防治效果。结果表明:30%噻虫嗪悬浮种衣剂600 m L/100kg对田间灰飞虱和粗缩病的防治效果分别为80.26%和82.23%,显著高于200 m L/100kg和400 m L/100kg...通过田间大田试验比较了不同制剂用量30%噻虫嗪悬浮种衣剂对玉米田灰飞虱及粗缩病的防治效果。结果表明:30%噻虫嗪悬浮种衣剂600 m L/100kg对田间灰飞虱和粗缩病的防治效果分别为80.26%和82.23%,显著高于200 m L/100kg和400 m L/100kg浓度处理,且对玉米安全无药害,可在玉米生产中推广使用。展开更多
文摘从玉米粗缩病的发生分布、病症特征、病原、寄主范围、传播方式和特点、流行规律、品种抗病性等方面回顾玉米粗缩病研究的历史和现状,分析探讨存在的问题和对策。引起玉米粗缩病的病原有Maize rough dwarfvirus(MRDV)、Rice black streaked dwarfvirus(RBSDV)和Mal de Río Cuarto virus(MRCV),在我国流行的是RBSDV,主要依靠Laodelphax striatellus传播。间作套种尤其是麦/玉米种植模式与玉米粗缩病暴发流行密切相关,主要是为病毒和传毒介体提供了栖息繁衍环境和循环寄主。目前玉米粗缩病抗性种质资源缺乏,应用的防治技术还不能满足生产上的需求。协调高效的种植模式(间套种)与防病需求之间的关系,研发简便、实用、高效的防病治病措施,抗玉米粗缩病种质资源的创新是生产上需要解决的问题。
文摘Maize rough dwarf disease (MRDD) is a viral disease that is widely distributed in the world and causes great losses in grain yield. During the past three decades, considerable progress has been made in the
文摘Four isolates of Rice black-streaked dwarf virus(RBSDV)were collected from the maize plants showing rough dwarf symptom in Linyi and Tai’an,Shandong province.The S10 genomic sequences of these isolates were determined and compared with those of 14 other RBSDV isolates.All of the four sequences were 1 801 base pairs(bp)long including the 5’-UTR of 21 bp and the 3’-UTR of 103 bp.They all contained an open reading frame of 1 677 bp(22-1698),encoding the coat protein(CP)of 558 amino acids.The sequences of these four RBSDV isolates and those of the major cp gene of 14 other isolates available in the GenBank were divided into two groups in the phylogenetic tree.Recombination analysis indicated that the isolate Lym2 was likely a recombinant of isolates Lym1 and Zhjs.
文摘通过田间大田试验比较了不同制剂用量30%噻虫嗪悬浮种衣剂对玉米田灰飞虱及粗缩病的防治效果。结果表明:30%噻虫嗪悬浮种衣剂600 m L/100kg对田间灰飞虱和粗缩病的防治效果分别为80.26%和82.23%,显著高于200 m L/100kg和400 m L/100kg浓度处理,且对玉米安全无药害,可在玉米生产中推广使用。
