摘要
为及时总结宁乡市稻瘟病发生特点,筛选出防治稻瘟病的有效药剂,针对2024年早稻稻瘟病的发生情况进行了调查,并在花明楼镇开展了8种供试杀菌剂对稻瘟病的田间防治效果筛选试验。结果表明,宁乡市早稻稻瘟病发生面积3895.2 hm^(2),受灾面积3102.47 hm^(2),绝收面积2145.93 hm^(2)。30%肟菌·戊唑醇悬浮剂和25%吡唑醚菌酯悬浮剂对早稻稻瘟病表现出很好的防效,以施用剂量分别为12、10 g a.i./667m^(2)兑水均匀喷雾,施药后15 d,其防效分别为92.48%、90.59%。说明30%肟菌·戊唑醇悬浮剂和25%吡唑醚菌酯悬浮剂可有效防控稻瘟病,但仍需注意杀菌剂合理轮用或混用,并尽量避免使用已产生抗性的药剂。
To summarize the characteristics of rice blast occurrence in Ningxiang city and identify effective fungicides for disease control,we investigated the incidence of rice blast in early-season rice(2024)and conducted a field efficacy trial evaluating eight fungicides in Huaminglou Town.The results showed that the affected area of rice blast in early-season rice reached 3895.2 ha,with 3102.47 ha damaged and 2145.93 ha completely lost.Among the tested fungicides,trifloxystrobin·tebuconazole 30%SC and pyraclostrobin 25%SC demonstrated superior efficacy.At application rates of 12 g a.i./667m^(2)and 10 g a.i./667m^(2)(uniformly sprayed with water),their control efficiencies reached 92.48%and 90.59%,respectively,15 days after treatment.These findings indicated that both fungicides are highly effective against rice blast.However,proper rotation or mixture of fungicides should be prioritized to mitigate resistance risks,and formulations with known resistance issues should be avoided.
作者
曾晓玲
王永辉
何国辉
徐灵超
刘新伟
袁伏才
ZENG Xiaoling;WANG Yonghui;HE Guohui;XU Lingchao;LIU Xinwei;YUAN Fucai(Ningxiang Plant Protection and Quarantine Station,Ningxiang 410600,Hunan,China;Ningxiang Agricultural Technology Extension Center,Ningxiang 410600,Hunan,China;Ningxiang Rural Livability Construction Service Center,Ningxiang 410600,Hunan,China;Ningxiang Rural Revitalization Service Center,Ningxiang 410600,Hunan,China;Shuangjiangkou Town Agricultural Comprehensive Service Center,Ningxiang 410600,Hunan,China)
出处
《世界农药》
2025年第8期54-59,共6页
World Pesticide
关键词
宁乡
稻瘟病
重发原因
杀菌剂
药效
ningxiang city
rice blast
causes of severe outbreaks
fungicide
control efficacy
