Abstract:

Wild rice fungal endophyte Falciphora oryzae could induce resistance to rice blast under laboratory conditions. In order to determine the control efficiency of Falciphora oryzae to rice blast of direct seeding rice, a field experiment was carried out in 2017 at Tonglu, Zhejiang. The results showed that the control efficiency of Falciphora oryzae treated in different periods to rice blast of direct seedling rice was equivalent to bioreagents Kasugamycin and Bacillus, there was no significant difference between different treatments. Among them, the control efficiency by seed dressing （0 d）, 7 d or 14 d after sowing to leaf blast reached above 70%. The control efficency of Falciphora oryzae by 7 d or 14 d after sowing to neck blast reached above 70%, too. Thus it can be seen that seed dressing or sowing treatment once was capable to control rice blast of direct seeding rice.

Key words: endophytic fungi, Falciphora oryzae, rice blast, control

摘要：

野生稻内生真菌稻镰状瓶霉在实验室条件下接种到水稻上，可以诱导水稻产生对稻瘟病的抗性。为了明确该内生菌田间不同时期施药对直播水稻稻瘟病的防治效果，2017年在浙江省桐庐县开展了田间试验。结果显示，稻镰状瓶霉不同时期施药对直播稻稻瘟病的防效与春雷霉素和芽孢杆菌相当，不同处理之间差异不显著。施用菌剂的处理对叶瘟的防效均达到70%以上；稻镰状瓶霉播后7 d、14 d施药处理对穗颈瘟的防效亦达70%以上。由此可见，稻镰状瓶霉可用于直播稻稻瘟病防治，拌种或播后撒施1次即可有效防治稻瘟病。

关键词: 内生真菌, 稻镰状瓶霉, 稻瘟病, 防治