Effect of High Temperatures on the Growth and Disease Development of Erysiphe quercicola on Rubber Trees
文献类型： 外文期刊
作者： He, Yongxiang 1 ; Xiao, Ying 1 ; West, Jonathan S. 2 ; Cao, Xueren 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Key Lab Integrated Pest Management Trop Crops, Minist Agr & Rural Affairs,Hainan Key Lab Monitori, Haikou 571101, Peoples R China
2.Rothamsted Res, Protecting Crops & Environm, Harpenden AL5 2JQ, England
关键词： Hevea brasiliensis; rubber tree powdery mildew; high temperature effect; germination; infection; disease severity
期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）
ISSN：
年卷期： 2025 年 15 卷 5 期
页码：
收录情况： SCI
摘要： Powdery mildew is a serious disease of the rubber tree (Hevea brasiliensis) worldwide. Temperature is the main climatic factor that influences the development of this disease. In this study, the effects of five high temperatures (30, 32, 34, 36, and 38 degrees C) at each of six exposure durations (0.5, 1, 3, 6, 12, and 24 h) were measured for the pathogen at 0, 3, 12, and 48 h post-inoculation (hpi), which represented four life stages of the fungus (conidia, conidial germination, infection, and hyphal growth). The results indicated that the germination, infection, and disease severity were reduced with increasing temperature and exposure duration. Temperature and exposure duration also significantly interacted to affect all life stages (p < 0.001). The relationships of the inhibition rate of conidial germination, infection, and disease severity with duration of exposure time (et) and high temperature (T) were described by logistic equations, with the percentage variance accounted for above 68%. Ungerminated conidia were found to be the most resistant to high temperature for E. quercicola from rubber tree, out of the four stages tested in this study. Only controlled-environmental experiments were conducted, and field studies are needed to enhance disease forecasting of rubber tree powdery mildew.
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