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甘薯病毒病(SPFMV)普遍存在于世界各甘薯产区.近年国内调查结果证明,该病毒在江苏、山东、北京、安徽、河南、四川等广大甘薯产区也普遍存在.它引起的甘薯叶片症状有明脉、褪绿斑,尤以紫色斑驳或紫色羽状斑驳显而易见.该病毒导致甘薯生长势减弱,块根变小.减产幅度因品种而异,如徐薯18一般减产20～30%,有些品种减产50%以上.该病毒随种薯带入苗床,随薯苗带入田间,可随其调运至其他地区.田间传播媒介是蚜虫和粉虱(Bermisia tabaci),以非持久方式传播.由于粉虱在本地少见,故蚜虫成为主要传播介体.了解蚜虫与该病毒的关系,对于繁殖和应用脱毒甘薯防治病毒病且有重要参考
Sweet potato virus disease (SPFMV) widespread in the sweet potato producing areas in the world in recent years, the domestic survey results show that the virus in Jiangsu, Shandong, Beijing, Anhui, Henan, Sichuan and other large sweet potato producing areas are widespread .Its caused sweet potato leaf symptoms There Mingjian, faded green spot, especially in purple mottled or purple feather mottle is obvious that the virus causes the sweet potato growth potential weakened, the root becomes smaller.Decrease rate due to the variety, such as Xu Shu 18 generally reduced by 20 to 30%, and some varieties Cut by more than 50%. The virus with seed potato into the seedbed, with the potato seedlings into the field, with its transfer to other regions .Field vector is aphids and whiteflies (Bermisia tabaci), non-persistent transmission .As the powder Lice in the local rare, so aphids become the main transmission mediator to understand the relationship between the aphids and the virus, for the breeding and application of virus-free sweet potato virus control and there is an important reference