Tsror Lahkim Leah, Erlich Orly, Amitai Sarit, Hazanovsky Marina
Department of Plant Pathology, Agricultural Research Organization, 85280 M. P. Negev, ISRAEL.
Plant Dis. 1998 Apr;82(4):437-439. doi: 10.1094/PDIS.1998.82.4.437.
Verticillium dahliae caused wilting, stunting and early dying of paprika plants in Israel, resulting in a 22% reduction in yield. A V. dahliae isolate from diseased paprika plants was slower growing on agar medium than V. dahliae isolates from potato, tomato, watermelon, and Dodonaea, but formed microsclerotia earlier. The paprika isolate of V. dahliae was highly virulent to paprika in pathogenicity tests. Disease severity indices obtained from three paprika cultivars ranged from 3.7 to 4.9 (on a scale of 0 to 5). The disease caused height reductions of 43 to 62% in the three inoculated paprika cultivars, and pathogen colonization levels were 10- to 35-fold higher in stems than in leaves. The potato isolate of V. dahliae did not produce symptoms or cause stunting of paprika, and could not be detected in stems or leaves. The tomato, watermelon, and Dodonaea isolates did not cause disease symptoms in paprika, although they colonized the plant tissue. In potato and eggplant, the paprika isolate caused a higher incidence of disease with more severe symptoms and a higher level of tissue colonization than did the potato isolate.
在以色列，大丽轮枝菌导致甜椒植株枯萎、生长受阻并过早死亡，造成产量下降22%。从患病甜椒植株分离出的大丽轮枝菌菌株在琼脂培养基上的生长速度比从马铃薯、番茄、西瓜和坡柳分离出的大丽轮枝菌菌株慢，但更早形成微菌核。在致病性试验中，大丽轮枝菌的甜椒分离株对甜椒具有高致病性。从三个甜椒品种获得的病情严重程度指数在3.7至4.9之间（0至5级）。该病害使三个接种甜椒品种的株高降低了43%至62%，病原菌在茎中的定殖水平比在叶中高10至35倍。大丽轮枝菌的马铃薯分离株未使甜椒产生症状或导致生长受阻，在茎或叶中也检测不到。番茄、西瓜和坡柳分离株虽能在甜椒植株组织中定殖，但未引起病害症状。在马铃薯和茄子中，与马铃薯分离株相比，甜椒分离株引起的发病率更高，症状更严重，组织定殖水平也更高。
