The productivity of melon crops is affected by several soilborne pathogens. The objective of this work was to assess the susceptibility of different melon hybrids to infection by the fungus Macrophomina phaseolina. Seeds of 42 melon genotypic accessions were sown in 750 mL plastic vessels with a mixture of Tropstrato® substrate and Ecofertil® compost in a 3:1 ratio. Inoculations were carried out 10 days after sowing using toothpicks colonised by the pathogen. A completely randomised design with 42 treatments and four replications was used in two successive trials. Plant health was scored using a 0–5 diagrammatic scale, 45 days after sowing. All melon genotypes developed disease symptoms but susceptibility varied across accessions. While 42.8% of tested accessions were highly susceptible, 50.0% were susceptible, and 7.2% were moderately resistant. No genotypes were resistant to M. phaseolina. Although the results presented here may lower the overall disease severity in melon crops, melon breeding programs need to identify sources of resistance to this pathogen.

甜瓜作物的生产力受到几种土壤传播病原体的影响。这项工作的目的是评估不同瓜类杂种对菜豆Macrophomina phaseolina的感染敏感性。。将42种甜瓜基因型种的种子播种在750 mL塑料容器中，并以3：1的比例混合底物和Ecofertil®堆肥。播种后10天，用病原体定植的牙签接种。在两项连续的试验中使用了具有42种治疗方法和四次重复的完全随机设计。播种后45天，使用0–5图解量表对植物健康进行评分。所有甜瓜基因型均表现出疾病症状，但易感性随种质而异。尽管有42.8％的受试种是高度敏感的，但50.0％的是易感性的，而7.2％的是中度抗性的。没有基因型对菜豆分枝杆菌有抗性。尽管此处介绍的结果可能会降低甜瓜作物的总体病害严重程度，但甜瓜育种计划需要确定对该病原体产生抗药性的来源。