Fusarium is one of the most important genera of phytopathogenic fungi, causing potato wilt in the field and potato tuber dry rot during storage. The objectives of this study were to identify Fusarium species associated with both potato diseases in different growing regions in Algeria, and to assess their pathogenicity. Among the 152 isolates collected from symptomatic potato plants and tubers in different provinces in Algeria, 13 species of Fusarium and Neocosmospora were identified. Among these three species were isolated only from plants showing symptoms of Fusarium potato wilt (F. oxysporum, F. venenatum, Neocosmospora solani). Two species (F. culmorum, N. tonkinensis) and an isolate of Neocosmospora sp. were found exclusively in tubers with potato dry rot and the remaining ones (F. redolens, F. cf. tricinctum, F. sambucinum, F. cf. incarnatum-equiseti, F. nygamai, F. brachygibbosum and N. falciformis) were associated with both sample types. Fusarium sambucinum was the most frequent species (52.6% of isolates). Fusarium oxysporum and F. nygamai isolates were the most aggressive in the potato wilt pathogenicity test, and F. sambucinum isolates were the most aggressive in the potato tuber pathogenicity test. This is the first study identifying and characterizing potato dry rot and potato wilt pathogens in Algeria.

镰刀菌是植物致病真菌最重要的属之一，在田间引起马铃薯枯萎和马铃薯块茎干腐。这项研究的目的是确定与阿尔及利亚不同生长地区的两种马铃薯病害相关的镰刀菌物种，并评估其致病性。从阿尔及利亚不同省份的有症状马铃薯植株和块茎收集的152种分离物中，鉴定出13种镰刀菌和新孢子虫。在这三种物种从植物示出的症状仅分离枯萎马铃薯枯萎病（尖孢镰孢，F.孢，茄新赤壳）。两种（F. culmorum，N. tonkinensis）和分离株Neocosmospora sp 。是在与马铃薯干腐块茎和其余的（仅仅存在F. redolens，F.参见tricinctum，F.接骨木，F.参见incarnatum-木贼，F. nygamai，F. brachygibbosum和N.阅览者）的相关联的两种样本类型。镰刀菌是最常见的种类（分离株的52.6％）。尖孢镰刀菌和F. nygamai株是最积极的马铃薯枯萎病致病性测试和F.接骨木在马铃薯块茎致病性试验中，分离株最强。这是阿尔及利亚首次鉴定和鉴定马铃薯干腐病和马铃薯枯萎病原体的研究。