摘要
稻纵卷叶螟Cnaphalocrocis medinalis是扬州邗江地区重要的水稻害虫之一,具有远距离迁飞特性,且长期以来给本地区水稻安全生产带来了巨大威胁。为了明确扬州邗江地区稻纵卷叶螟的田间种群动态,本研究通过田间系统调查发现2010-2020年间稻纵卷叶螟四(2)代为害较轻,五(3)代和六(4)代仍是主害代。四(2)代只有在2010年和2013年形成了明显的高峰,而五(3)代和六(4)代可以形成明显的蛾蜂,且蛾高峰期持续天数均达到了23 d及以上。五(3)代稻纵卷叶螟产卵高峰期田间虫(卵)量与发生程度正相关,但六(4)代稻纵卷叶螟的相关性较差。对本地区影响稻纵卷叶螟发生原因进行分析发现:月平均温度与五(3)代稻纵卷叶螟的发生程度有着密切的关联,但月平均温度与六(4)代种群的数量没有相关性。同时,田间降雨量与稻纵卷叶螟的发生情况无明显的相关性。此外,不同栽培方式也对稻纵卷叶螟的发生有关系,例如,在手栽稻田和机插稻田中六(4)代稻纵卷叶螟的蛾量要高于直播稻田。
Cnaphalocrocis medinalis is one of the important rice pests in Hanjiang area of Yangzhou.It has long-distance migration characteristics and has long threatened the safety of rice production in this region.In order to clarify the field population dynamics of C.medinalis in Hanjiang area of Yangzhou,this study found that the fourth(2)generation of C.medinalis was less harmful from 2010 to 2020,and the fifth(3)and sixth(4)generations were still the main pest generations.The fourth(2)generation only formed obvious peaks in 2010 and 2013,while the fifth(3)and sixth(4)generations both could form obvious moth peaks which lasted for 23 days or even longer.The number of insects(eggs)in the field during the peak oviposition period of the fifth(3)generation of C.medinalis was positively correlated with the occurrence degree,but the correlation between the sixth(4)generation of C.medinalis was poor.The analysis of the causes of the occurrence of the C.medinalis in this area found that month average temperatures had a close relationship with the occurrence of the fifth(3),but month average temperatures weren t related to the numbers of the sixth(4)generations populations.Meanwhile,there was no obvious correlation between the field rainfall and the occurrence of C.medinalis.In addition,different cultivation methods were also related to the occurrence of C.medinalis.For example,the number of C.medinalis moths of the sixth(4)generation in hand-planted rice fields and machine-transplanted rice fields were higher than that in direct-seeded rice fields.
作者
董红刚
耿跃
左希
陈凤
梅爱萍
陆明星
DONG Hong-Gang;GENG Yue;ZUO Xi;CHEN Feng;MEI Ai-Ping;LU Ming-Xing(Crop Technology Extension Center of Hanjiang District,Yangzhou City,Yangzhou 225009,Jiangsu Province,China;School of Horticulture and Plant Protection,Institute of Applied Entomology,Yangzhou University,Yangzhou 225009,Jiangsu Province,China)
出处
《环境昆虫学报》
CSCD
北大核心
2021年第4期850-857,共8页
Journal of Environmental Entomology
基金
国家重点研发计划(2017YFD0201000)
扬州大学自制实验仪器项目(zzyq202020)。
关键词
稻纵卷叶螟
种群数量
年际发生动态
影响因素
Cnaphalocrocis medinalis
population quantity
interannual occurrence dynamics
influencing factors
作者简介
董红刚,男,硕士,高级农艺师,主要研究方向为植保技术推广,E-mail:113633800@qq.com;通讯作者:陆明星,男,博士,副教授,主要研究方向为昆虫种群演变规律及综合治理,E-mail:lumx@yzu.edu.cn。
