昆虫学报 ›› 2020, Vol. 63 ›› Issue (5): 613-623.doi: 10.16380/j.kcxb.2020.05.011

• 研究论文 • 上一篇    下一篇

草地贪夜蛾在浙江东阳田间玉米植株上的发生及防治策略

韩海亮1, 章金明2, 徐红星2, 包斐1, 刘敏2, 赵福成1吕要斌2, 吕仲贤2, 王桂跃1,*   

  1. (1. 浙江省东阳玉米研究所, 浙江东阳 322100; 2. 浙江省农业科学院植物保护与微生物研究所, 杭州 310021)
  • 出版日期:2020-05-20 发布日期:2020-06-08

Occurrence and control strategy of Spodoptera frugiperda (Lepidoptera: Noctuidae) on maize plants in fields in Dongyang, Zhejiang, eastern China

HAN Hai-Liang1, ZHANG Jin-Ming2, XU Hong-Xing2, BAO Fei1, LIU Min2, ZHAO Fu-Cheng1, LÜ Yao-Bin2, LÜ Zhong-Xian2, WANG Gui-Yue1,*   

  1.  (1. Zhejiang Dongyang Maize Research Institute, Dongyang, Zhejiang 322100, China; 2. Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China)
  • Online:2020-05-20 Published:2020-06-08

摘要:  【目的】明确草地贪夜蛾Spodoptera frugiperda在浙江省鲜食玉米品种上的发生规律和防治方法。【方法】2019年在浙江东阳通过灯诱和性信息素诱捕方法研究草地贪夜蛾成虫消长规律;通过田间调查明确成虫产卵习性和幼虫对玉米植株的为害习性,以及幼虫对不同甜、糯玉米品种的为害差异;通过田间药效试验筛选高效防治药剂。【结果】灯诱和性信息素诱捕结果表明草地贪夜蛾在浙江东阳于6月中下旬和9月中旬出现2次明显成虫高峰,9月峰值显著高于6月;草地贪夜蛾成虫趋向于在较低叶龄玉米植株上产卵,80%的卵产于玉米叶片正面,幼虫取食具有显著的趋嫩习性,严重为害玉米心叶和果穗;不同玉米品种被害株率差异较大,甜玉米品种为害株率为0~28.41%,糯玉米品种为害株率为0~42.50%。2019年在浙江东阳进行的田间药剂试验筛选出了甲维盐、虱螨脲、乙基多杀菌素、甲氧虫酰肼、虫螨腈、丙溴磷、灭多威、茚虫威、苦皮藤素Celastrus angulatus和甘蓝夜蛾核型多角体病毒(Mamestra brassicae NPV, MbNPV)等高效防治药剂,药后3 d虫口减退率为87.61%~98.99%,田间持效期约为7~10 d。【结论】草地贪夜蛾不仅为害玉米植株的叶片,更严重为害果穗,秋季为害显著高于春季,对鲜食玉米的生产造成严重影响。在防治玉米上的草地贪夜蛾时,应采用化学防治、生物防治和物理诱控相结合的综合防控措施,以及重视苗期保苗和后期保穗,适当放宽拔节期到抽雄期防治阈值的防治策略。

关键词: 草地贪夜蛾, 鲜食玉米, 种群动态, 为害习性, 化学防治, 综合防治

Abstract:  【Aim】 This study aims to clarify the occurrence and control methods of Spodoptera frugiperda on fresh-eating maize varieties in Zhejiang Province, eastern China. 【Methods】 The population dynamics of S. frugiperda adults was monitored by light trap and sex pheromone trap in Dongyang, Zhejiang in 2019. The oviposition and damage characteristics of S. frugiperda larvae on maize plants were observed in field, and the damage differences of S. frugiperda to different waxy and sweet maize varieties were determined by field investigation. The highly effective insecticides for field application were screened by field test. 【Results】Theresultsoflighttrapandsexpheromonetrapshowed that there were two peaks of S. frugiperda adults in Dongyang, Zhejiang, which happened in late June and mid-September, respectively, and the peak in September was significantly higher than that in June. The moth tended to lay eggs on the young maize plants, and 80% of the eggs were laid on the upperside of leaves of maize. The larval feeding showed a significant tendency toward tender tissues, damaging heart leaves and ears of maize. The damage rates of S. frugiperda to different maize varieties were quite different, being 0-28.41% to sweet corn, and 0-42.50% to waxy corn. Emamectin benzoate, lufenuron, spinetoram, methoxyfenozide, phlorfenapyr, profenofos, methomy, indoxacarb, Celastrus angulatus and Mamestra brassicae NPV (MbNPV) were screened out as the highly effective pesticides to control S. frugiperda in the filed test in Dongyang, Zhejiang in 2019, the larval population decreased by 87.61%-98.99% at 3 d post pesticide application, and the persistence period was about 7-10 d in the field. 【Conclusion】 S. frugiperda not only injures leaves of maize plants, but also ears. The damage in autumn is significantly serious than that in spring. For the control of S. frugiperda on maize plants, the integrated control measures including chemical control, biocontrol and physical induction control methods should be adopted. The control strategies also need to pay attention to seedling conservation at the seeding stage and ear conservation at the later stage, and to appropriately relax the control threshold from the jointing stage to the tassel stage.

Key words: Spodoptera frugiperda, fresh-eating maize, population dynamics, damage characteristics, chemical control, integrated control