辽宁马铃薯晚疫病发生情况调查

Investigation on the Occurrence of Potato Late Blight in Liaoning Province

2018—2019年对辽宁7个市14个调查点的马铃薯晚疫病发生及流行情况进行调查。结果表明:辽宁地区马铃薯晚疫病普遍发生,两年间各调查点的病田率均为100%,病株率均超过60%,且2019年病害发生程度重于2018年。大连市、葫芦岛市和阜新市马铃薯晚疫病发生最为严重。马铃薯大垄双行栽培模式有助于减轻马铃薯晚疫病害,中晚熟品种与早熟品种相比较为抗病。

From 2018 to 2019,the occurrence and prevalence of potato late blight in 14 survey sites in 7 cities in Liaoning province were investigated.The results showed that:Potato late blight was prevalent in Liaoning province.The incidence of potato late blight was 100%and the incidence of potato plant was more than 60%in each survey site in the past two years,and the incidence of potato late blight was more serious in 2019 than in 2018.The occurrence of potato late blight was most serious in Dalian,Huludao and Fuxin.The potato cultivation pattern of two row with big ridge helped to reduce potato late blight and the varieties of middle and late ripening were more resistant to disease than those of early ripening varieties.