---

作 者 ：崔建潮, 周如军, 傅俊范, 徐 喆, 薛彩云

期 刊 ：植物病理学报 2016年 46卷 2期 页码：265-272

关键词：花生褐斑病；网斑病；流行学；互作；产量损失；

Keywords:Cercospora arachidicola, Phoma arachidicola, epidemiology, interaction, yield loss,

摘 要 ：通过田间小区人工接种试验,分析比较了花生褐斑病和网斑病单独及混合发生的流行过程及对花生产量损失的影响。结果表明,在病害混发初期,病害间无明显的相关性,随着病情加重,病害间的负相关性逐渐增大并达到显著水平,说明病害间有明显的抑制作用。在不同生育期接种发病情况有所差异,在开花初期和盛花期接种,褐斑病和网斑病的病情较重,而在开花末期接种的病情较轻,但都能表现病害间的抑制作用。病害混发时造成的产量损失小于各病害单独造成损失之和,对白沙1016和四粒红接种2种病菌,病害混合发生所造成产量损失约为各病害单独引起损失之和的77.2% ~ 85.7%和76.1% ~ 79.6%。在不同生育期接种2种病菌,2个品种产量的损失均随着侵染时期的推迟而逐渐降低。

Abstract:Epidemic processes and yield losses of early leaf spot (Cercospora arachidicola) and web blotch (Phoma arachidicola) of peanut were analyzed in the field plots. The results showed that there were no significant correlations between the two diseases at the early stage when they occurred together, but the negative correlation between the two diseases gradually increased with the development of the disease. This phenomenon showed that there was an inhibitory effect between the two diseases. Disease severity was different when C. arachidicola and P. arachidicola were inoculated in the different growth stage, early leaf spot and web blotch were more serious when C. arachidicola and P. arachidicola were inoculated in the early flowering stage and the flowering stage than in the late flowering stage, and the results demonstrated the inhibitory effect. The yield loss when two diseases occurred together was less than the sum of that caused by each individual disease. Yield loss of Baisha1016 caused by the two diseases occurring together was about 77.2%-85.7% of the sum of yield loss that caused by the corresponding individual disease. Yield loss of Silihong caused by the two diseases occurring together was about 76.1%-79.6% of the sum of yield loss that caused by the corresponding individual disease. The yield losses of two cultivars were both reduced gradually with the delay of inoculation period at the different growth stage.

---