马铃薯晚疫病是毕节市马铃薯生产上的重要流行性病害，为了探索晚疫病综合控制技术，选择2个品种，采取3个不同播种时期对马铃薯晚疫病的控制效果进行研究。结果表明：‘费乌瑞它’和‘宣薯3号’对晚疫病表现较感病；栽种的感病品种虽然播期时间不一致，但晚疫病始病时间和病情发展情况基本一致，两品种均以第1播期（2月25日）病情略轻，以当地大面积种植马铃薯的关键时期，即第2播期（3月3日）产量最高。建议生产上以当地长期总结的最佳播种期播种，达到增产增收的目的。%Late blight is an important disease in potato production in Bijie City of Guizhou Province. In order to investigate the integrated techniques for late blight control, three planting dates were used to test their effects on late blight control on two varieties. 'Favorita' and 'Xuanshu 3' were both susceptible to late blight. These two varieties, though planted on different times, showed symptoms and disease progress at the similar pace. For both varieties, disease index at peak time was low when planted at the first planting time (Feb. 25). However, the second planting time (Mar. 3) accepted widely for local large scale production, gave the highest yield. Therefore, it is proposed that potato should be planted on the optimal day local farmers used, in order for them to get high yield and high profit.
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