摘要
为明确田间水稻白背飞虱Sogatella furcifera(Horváth)和褐飞虱Nilaparvata lugens(St?l)的主要寄生性天敌索线虫科线虫的寄生动态及防控效果,于2013—2015年在湖南省长沙市宁乡市通过田间调查和线虫罩笼法研究了索线虫科线虫对白背飞虱和褐飞虱的寄生动态以及优势种长沙多索线虫Agamermis changshaensis Bao,Luo et Luo对褐飞虱的防控效果。结果表明,在长沙市,索线虫科线虫寄生白背飞虱始见期为6月底至7月初,1个月后出现高峰期,基本与白背飞虱发生高峰期同步;对褐飞虱寄生高峰期早稻多发生在7月中下旬,而晚稻在8月底至9月中旬。索线虫科线虫对白背飞虱雌虫、高龄若虫和雄虫最高寄生率分别为16.95%、14.81%和7.69%;而对褐飞虱雌虫、高龄若虫和雄虫最高寄生率分别为43.33%、20.93%和11.63%。2014年和2015年罩笼盆栽试验结果表明,处理后45 d长沙多索线虫对褐飞虱的防控效果分别为36.11%和33.19%。研究结果表明长沙多索线虫可以作为水稻稻飞虱绿色防控的一种重要辅助性措施。
The white-backed planthopper, Sogatellafurcifera （Horvath）, and brown planthopper, Nilaparvata lugens （Stal）, are the most destructive pests for rice in Hunan Province. Mermithid nematodes are very important parasite natural enemies for rice planthoppers in the paddy area. To understand the dynamics of mermithid nematode parasitic rates to white-backed planthoppers and brown planthoppers in the paddy area, the field investigation were conducted in Ningxiang City from 2013 to 2015. Moreover, the control effects ofAgamermis changshaensis against brown planthoppers were evaluated with cage trial. The results showed that the first appearance of parasitic behavior of mermithid nematodes to white-backed planthoppers and brown planthoppers mainly occurred from late June to early July. The major parasitic period of mermithid nematodes was synchronized with occurrence peak of white-backed planthoppers. However, for brown planthoppers, the parasitic peaks in early rice were observed in middle or late July, and in late rice a sustained parasitic peak was recorded from late August to middle Sep- tember. During 2013 and 2015, the highest parasitic rates of mermithid nematodes to females, 3rd-5th instar nymphs and males of white-backed planthoppers were 16.95%, 14.81% and 7.69%, respectively, and to brown planthoppers were 43.33%, 20.93% and 11.63% respectively. Moreover, during 2014 and 2015, the control effects at 45 days after treatment ofA. changshaensis against brown planthoppers were 36.11% and 33.19%, respectively. The results suggested that A. changshaensis using could be considered as an important supporting technology to green integrated management technology for rice planthoppers.
出处
《植物保护学报》
CAS
CSCD
北大核心
2017年第6期989-995,共7页
Journal of Plant Protection
基金
国家自然科学基金(31501635)
国家重点研发计划(2016YFD0200809)
湖南省农业科学院科技创新项目(2017GP10)
关键词
索线虫科线虫
长沙多索线虫
白背飞虱
褐飞虱
寄生率
防控效果
mermithid nematode
Agamermis changshaensis sp. nov
Sogatella furcifera Horvath
Nilaparvata lugens Stal
parasitic rate
control effect
