三七皱缩型病毒病发生规律调查研究

Research on Occurrent Regularity of Notoginseng Shrinking Virus Disease

为探明三七皱缩型病毒病的发生规律,采取系统调查法开展了历时3年的调查。结果表明：三七皱缩型病毒病在三七整个生长期均可发生,表现出波浪式起伏、峰值多、峰期历时长的特点。高峰期出现时间、数量及峰值的大小因七龄及各年气候条件的不同而不同,峰值通常出现在4月下旬、5月中旬至5月下旬、6月下旬至7月下旬、8月、9月中旬至9月下旬、10月、11月中旬至12月上旬,同龄七不同年可因气候变化而有所前移或后延10～15 d;高龄七病情明显重于低龄七。建议根据皱缩型病毒病发生规律,生产上从选育无病种子、种苗入手,注重对媒介昆虫的控制,加强田间管理,以避免或减轻病毒病的发生危害。

This study used system investigation method to study occurrent regularity of notoginseng shrinking virus disease in three-year.The results showed that notoginseng shrinking virus disease could happen in the whole growth period plants.It＇s characteristic performaned wave ups and downs, a lat of peak and peak period lasted long.The peak time, peak quantity and the peak up and down different that due to the differention of gisengs age, climate conditions in every year.The peak usually appeared in late April, mid-may to late may, in late June to late July, August, mid-september to late September,October,November to early December.The peaks of same ages plant could be moved forward or delayed 10-15 days due to climate change. The older plants state of illness were heavier than younger plants.In order to avoid or reduce the harm of virus disease, it suggested that breeding disease-free seeds and seedlings, paid attention to the control of insect vectors and strengthen field management.