新疆农业科学2016，Vol.53Issue(11)：2090-2097,8.DOI:10.6048/j.issn.1001-4330.2016.11.017
温湿度与光照对葡萄霜霉病菌孢子囊萌发及存活的影响
Effects of Temperature,Humidity and Illumination on the Germination and Survival of Sporangia of Downy Mildew of Grapes
摘要
Abstract
Objective]The objective of this project is to study the effects of climate factors on the germi-nation and survival of grape downy mildew sporangia,and provide the theoretical basis to control the disease.[Method]The survival and germination of sporangium was researched by controlling temperature,humidity, light and other climatic factors.[Result]The results showed that sporangia could germinate in water and re-lease zoospores,and the optimum germination temperature was approximately 1 8 -22℃.Sporangia survival was related to temperature,humidity,and light.At 35℃and relative humidity of either 70%or 100%,spo-rangia died within three days.Sporangia survived for more than six days at 10-20℃,regardless of light con-ditions.Disease was observed when these shriveled sporangia were inoculated onto leaf discs.This indicated that shriveled sporangia cannot be used as an indicator whether the sporangia were dead or not.Sporangia were dead after illumination with 0.58 ×102μW /cm2 of ultraviolet light for 5 h.The sporangium did not germi-nate and was not pathogenic after exposure to 8 h direct light.The sporangium survived with 10 h irradiance of scattered light.[Conclusion]Sporangia could germinate in water and release zoospores,and the optimum ger-mination temperature is about to 18 -22℃;the sporangium was sensitive to ultraviolet light.At the direct light intensity of 65,000-107,100 lx,the sporangium would die in 8 hours.关键词
葡萄霜霉病/温湿度与光照/孢子囊/萌发/存活Key words
downy mildew of grape/temperature and humidity and light/sporangium/germination/surviv-al分类
农业科技引用本文复制引用
李卓,金恭玺,郎宁,孙琦,任毓忠,赵宝龙,张莉,李国英..温湿度与光照对葡萄霜霉病菌孢子囊萌发及存活的影响[J].新疆农业科学,2016,53(11):2090-2097,8.基金项目
公益性行业专项（201203035）@@@@Supported by the earmark funds for public welfare industry （）
