Common bean (Phaseolus vulgaris L.) production in the humid tropics may increase if less predictable rainfall becomes a serious seed yield constraint in traditional areas of production. The successful production of common bean will require the effective management of common bean diseases favored by hot and humid conditions. Web blight (WB), caused by Thanatephorus cucumeris (Frank) Donk, is a serious disease of common bean in the humid tropics causing significant losses in both seed yield and seed quality. At present, only moderate levels of WB resistance have been identified. Leaf and seed damage and leaf lesion size are criteria that have been successfully used to screen common bean genotypes for WB resistance in the greenhouse and in the field. Pedigree selection has been successfully used to develop cultivars having moderate levels of resistance. Recurrent selection has been used to broaden the genetic base and to produce progeny having higher levels of WB resistance. Sources of resistance from secondary gene pools should be used to combine resistance genes from diverse sources. Common bean cultivars with earlier maturity, deep tap roots, and terminal drought tolerance may be desirable traits for farmers who plant later in the wet season to avoid WB. Seed production during the dry season using irrigation would help to reduce infection of the seed and transmission of the WB pathogen. Minimum tillage techniques are useful to help to reduce the spread of the disease. Biological control may contribute to the management of WB and complement genetic resistance.

中文翻译：

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菜豆网枯病抗病育种与综合治理

如果可预测的降雨量减少成为传统生产区种子产量的严重限制因素，则潮湿热带地区的菜豆（Phaseolus vulgaris L.）产量可能会增加。普通豆类的成功生产需要有效管理受炎热和潮湿环境影响的常见豆类疾病。网枯病 (WB)，由Thanatephorus cucumeris引起(Frank) Donk，是一种在潮湿热带地区常见的豆类严重病害，对种子产量和种子质量造成重大损失。目前，仅确定了中等水平的 WB 抗性。叶片和种子损伤以及叶片损伤大小是已成功用于筛选温室和田间 WB 抗性的常见豆基因型的标准。谱系选择已成功用于开发具有中等抗性水平的品种。循环选择已被用于拓宽遗传基础并产生具有更高水平的WB抗性的后代。二级基因库的抗性来源应用于组合来自不同来源的抗性基因。普通豆品种成熟早，主根深，对于在雨季后期种植以避免 WB 的农民来说，最终的耐旱性可能是理想的特征。在旱季使用灌溉生产种子将有助于减少种子感染和 WB 病原体的传播。最少耕作技术有助于减少疾病的传播。生物控制可能有助于 WB 的管理和补充遗传抗性。