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Investigations on disease development and yield loss of early blight in potato cultivars of different maturity groups

机译：不同成熟度马铃薯品种的病害发展及早疫病减产研究

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Early blight is a major disease of potatoes which has established in most potato growing areas as a destructive disease. The integration of several factors like weather conditions, nutrition, the use of potent fungicides as well as the cultivation of tolerant varieties are essential parts of an integrated control strategy and can be effective in preventing early blight disease. Cultivar resistance to early blight disease has become more important due to losses in fungicide sensitivity. Nevertheless, little research has been directed towards this area. Several, perennial field trials were carried out in order to investigate disease susceptibility for varieties out of different maturity groups. Early maturing varieties have shown to be more susceptible. The disease intensity (AUDPC) was much more expressed in early varieties contrary to medium and late maturing varieties. However, a stronger impact on potato yield has been found in the medium to late maturing varieties. We discuss the relevance of time and amount of leaf damage for formation of tuber yield.
机译：早疫病是马铃薯的主要疾病，已经在大多数马铃薯种植区确立为破坏性疾病。整合多种因素，例如天气条件，营养，有效杀菌剂的使用以及耐受性品种的培育，是综合控制策略的重要组成部分，可以有效地预防早疫病。由于对杀真菌剂的敏感性下降，品种对早疫病的抵抗力变得更加重要。然而，很少有研究针对该领域。进行了数项常年性田间试验，以调查不同成熟度组中品种的疾病敏感性。早熟品种已显示出更易感。与中等和晚期成熟品种相反，在早期品种中疾病强度（AUDPC）表达更多。但是，已发现中熟至晚熟品种对马铃薯产量的影响更大。我们讨论了时间和叶片损伤量与块茎产量形成的相关性。

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