草地贪夜蛾卵块在玉米植株上的空间分布
2021-03-12黄建荣刘彬田彩红黄博赵文新吕国强李国平封洪强
黄建荣 刘彬 田彩红 黄博 赵文新 吕国强 李国平 封洪强



摘要 :本研究调查了草地贪夜蛾卵块在田间玉米植株上的空间分布,发现草地贪夜蛾卵块主要分布于植株中部,即玉米小喇叭口期倒3叶与倒4叶、吐丝期倒5叶与倒6叶上卵块最多,在小喇叭口期主要分布在叶正面,吐丝期主要分布于叶背面,距叶尖平均距离分别为23.4 cm和35.2 cm。为玉米上草地贪夜蛾卵的调查和防治提供了参考。
关键词 :草地贪夜蛾; 卵; 玉米; 分布
中图分类号: S 435.132
文献标识码: A
DOI: 10.16688/j.zwbh.2020240
Spatial distribution of the fall armyworm Spodoptera frugiperda egg masses on corn plant
HUANG Jianrong1#, LIU Bin1#, TIAN Caihong1, HUANG Bo1, ZHAO Wenxin2,
L Guoqiang2, LI Guoping1*, FENG Hongqiang1*
(1. Henan Key Laboratory of Crop Pest Control, Key Laboratory of Integrated Pest Management on Crops in Southern
Part of Northern China, Ministry of Agriculture and Rural Affairs, International Joint Research Laboratory for
Crop Protection of Henan, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou
450002, China;
2. Plant Protection and Inspection Station of Henan Province, Zhengzhou 450002, China)
Abstract :The spatial distribution of fall armyworm Spodoptera frugiperda egg masses was investigated in corn field. The results indicated that the egg masses were mainly located in the middle of corn plant, where in the 3rd-4th leaves from the top of the plants at early whorl stage, and the 5th-6th leaves from the top of the corn plants at silking stage. The egg masses of S.frugiperda were mainly distributed on the adaxial surface of corn leaf at the early whorl stage, and on the abaxial surface of corn leaf at the silking stage, with the average distance of 23.4 cm and 35.2 cm to the leaf tip, respectively. The results will provide useful information for the investigation and control of S.frugiperda egg in corn field.
Key words :Spodoptera frugiperda; egg; corn; distribution
草地貪夜蛾Spodoptera frugiperda (J.E.Smith)在2019年入侵为害了我国除青海、新疆及东北三省以外的大部分玉米种植地区,因其寄主范围广、迁飞与繁殖能力强等特点,对我国玉米的安全生产构成极大威胁[1]。实时监测和准确预报是草地贪夜蛾应急防控的基础[2],使用灯光或性信息素诱集成虫(性诱或灯诱)和大田普查幼虫是目前确定草地贪夜蛾的迁入时期和防治时期的主要方法[35]。由于草地贪夜蛾具有迁飞习性,诱到或见到成虫不能确定其就在本地产卵造成为害。调查幼虫虽然准确可靠,但决策和采取防治措施的时间紧迫,容易错过最佳防治时期。调查卵块既能准确反映虫情,又可给决策和采取防治措施留出足够的时间,与监测成虫和幼虫相比有明显的优势。
由于雌虫对不同寄主或同种寄主不同部位的趋性不同,卵量也因寄主种类或寄主部位而异[6]。棉铃虫Helicoverpa armigera在夏季喜欢产卵于棉花,而秋季喜产卵于吐丝期的玉米[7]。在同一寄主上,昆虫一般将卵产于幼嫩组织上(内)或繁殖器官上,以便为后代的生存提供优越条件[810]。……
