论文部分内容阅读
一、前言马铃薯晚疫病在我省经常发生,尤其是多雨潮湿年份发生更为严重,对不抗病品种危害很大.发生轻的年份减产20～30%,发生重的年份减产50%以上,甚至绝产;此外,还可使块茎在田间、预贮期和贮藏期间发生腐烂,而且第二年用病薯作种时,幼苗长势缓慢或发生烂种,造成缺苗断条,导致减产.此病对夏播马铃薯危害更大,一般减产50%以上,致使不抗病的品种不能夏播留种.晚疫病是影响我省马铃薯产量提高和块茎品质改善的一个关键性问题,须尽快研究解决.
I. Introduction Late blight of potato occurs frequently in our province, especially in rainy and humid years, which is harmful to non-disease-resistant varieties, with 20-30% reduction in light years, 50% reduction in heavy years, In addition, tubers can also be rotted during the field, during storage and during storage. In the second year, when seedlings are grown in the soil, the seedlings grow slowly or become rotten, which results in the lack of seedlings breaking, resulting in the decrease of yield. The disease is more harmful to the summer sowing potato, generally reduce the yield more than 50%, resulting in non-disease resistant varieties can not be sowing .In late blight is affecting the potato yield and improve the quality of tubers a key issue, we must study as soon as possible solve.