Effect of Various Soil Media on Disease Severity of <i>Fusarium</i>Wilt in Watermelon

• 作者: Cecilia McGregor Geoffrey Meru
• 来源期刊: 美国植物学期刊(英文)
• 学科: 数学
• 关键词: Breeding Citrullus lanatus Pathogen Fusarium oxysporum Race 1 Soil-Type AUDPC
• 年，卷（期）: mgzwxqkyw_2020,（12）
• 页码范围: 1890-1898
• 页数: 9页
• 分类号: O17

摘要

Fusarium wilt is a major disease of watermelon (</span><i><span style="font-family:Verdana;">Citrullus</span></i> <i><span style="font-family:Verdana;">lanatus</span></i><span style="font-family:Verdana;">) caused by </span><i><span style="font-family:Verdana;">Fusarium</span></i> <i><span style="font-family:Verdana;">oxysporum</span></i><span style="font-family:Verdana;"> f. sp. </span><i><span style="font-family:Verdana;">niveum</span></i><span style="font-family:Verdana;"> (</span><i><span style="font-family:Verdana;">Fon</span></i><span style="font-family:Verdana;">). Use of host resistance is the most </span><span style="font-family:Verdana;">effective management strategy for the disease, and a major objective for breeding programs. Screening assays rely on the ability to discriminate resistant and susceptible genotypes in segregating populations. However, complex</span> <span><span style="font-family:Verdana;">interactions between </span><i><span style="font-family:Verdana;">Fon</span></i><span style="font-family:Verdana;"> and the soil environment can influence symptom development and disease severity rating. In the current study, severity of Fusarium wilt (race 1) in sand-peat (1:1 v/v), sand-perlite (1:1), sand-peat-vermiculite (4:1:1), </span></span><span style="font-family:Verdana;">peat-perlite (1:1) and Fafard 3B potting media was compared among five watermelon cultivars: Calhoun Gray (resistant), </span><span style="font-family:Verdana;">SunSugar (resistant), Allsweet (moderately resistant), Sugar Baby (susceptible) and Charleston Gray (susceptible). Plant biomass (average dry weight/plant) was lowest in peat-perlite (1.67</span></span><span style="font-family:""> </span><span style="font-family:Verdana;">g) </span><span style="font-family:""><span style="font-family:Verdana;">and sand-peat (2.16 g), and was significantly different (</span><i><span style="font-family:Verdana;">α</span></i><span style="font-family:Verdana;"> = 0.05) from that of sand-perlite (3.48 g), sand-peat-vermiculite (4.94 g)