南方农业学报2017，Vol.48Issue(11)：1994-1998,5.DOI:10.3969/j.issn.2095-1191.2017.11.11
水稻生育期空气中稻曲病菌孢子释放动态及影响因素分析
Spore release dynamics of Ustilaginoidea virens(Cooke) Takahashi in the air and its influence factors at rice growth period
摘要
Abstract
[Objective]This experiment studied the spore release dynamics of Ustilaginoidea virens(Cooke)Taka-hashi in field and its influence factors in order to provide scientific reference for predicting occurrence of rice false smut.[Method]The spore release of U. virens using the spore trap in Sichuan rice growing area were monitored,and spore release dynamics of U. virens in field were analyzed. Meteorological data during 2014-2016 at rice growth period were collected,including temperature and average humidity,to study the inner relation among meteorological factor,spore release and rice false smut.[Result]It was found that the spores release exhibited dynamic change during rice growth period. Meanwhile,the results showed that the spores release rose gradually from middle May to early July,spore release boosted sharply in late July and reached the peak in late July and early August,then declined gradually from middle August. In late September,spore amount declined to the level in May. Symptom of rice false smut was visible after 10 d from the spore release peak. The spores release was positively correlated with the pathogen quantity in field and disease severity in the last year,and it also related to temperature and humidity. Conditions with average temperature being 25 to 30℃and relative humidity over 85%were advantageous to the spores release and the happening of rice false smut.[Conclusion]There is close connection among spore release,meteorological factors and rice false smut.关键词
稻曲病菌/孢子释放量/菌源量/气象因子Key words
Ustilaginoidea virens(Cooke)Takahashi/spore release/pathogen quantity/meteorological factor分类
农业科技引用本文复制引用
伏荣桃,王剑,陈诚,龚学书,卢代华,徐翔..水稻生育期空气中稻曲病菌孢子释放动态及影响因素分析[J].南方农业学报,2017,48(11):1994-1998,5.基金项目
四川省科技厅农业公益项目(2015NZ0028) （2015NZ0028）
四川省农业科学院青年基金项目(2015JSCX-017) （2015JSCX-017）
