Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (8): 1571-1576.DOI: 10.3969/j.issn.1000-2561.2019.08.017

• Crop Pests, Diseases and Their Control, Environmental Protection • Previous Articles     Next Articles

Toxicity of Insecticides Against Larvae of Spodoptera frugiperda Population, A New Invasive Pest

JIN Tao,LIN Yuying,MA Guangchang,MA Zilong,XIANG Kaiping,YI Kexian,PENG Zhengqiang()   

  1. Environment and Plant Protection Institute of China Academy of Tropical Agricultural Science / Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou, Hainan 571101, China
  • Received:2019-06-18 Revised:2019-07-22 Online:2019-08-25 Published:2019-08-20
  • Contact: PENG Zhengqiang


The fall armyworm, Spodoptera frugiperda, first invaded Yunnan, China, in January 2019, is a notorious agricultural pest insects. It was first founded on maize in Haikou city in April, and poses a serious threat to the production of fresh eating maize. It is urgent to screen out high toxicity insecticides for controlling this pest. By leaf dipping method, the toxicities of 15 insecticides to larvae of S. frugiperda were tested under laboratory conditions. The results showed that at the relative lower concentration of emamectin benzoate (5 mg/L, 24 h) and spinosad (5 mg/L, 24 h), and relative higher concentration of chlorantraniliprole (50 mg/L, 72 h) and phoxim (100 mg/L, 72 h) have 100% contact toxicity to larvae of S. frugiperda. Their 50% lethal concentration (LC50) at 24 h is 0.28, 0.31, 9.77 and 11.7 mg/L, respectively. Other insecticides such as methomy, pyriproxyfen, fipronil, acetamiprid, abamectin, beta-cypermethrin and lufenuron, at concentration of 100 mg/L with 72 h, have 100%, 96.67%, 88.33%, 86.11%, 81.67%, 80.83%, and 80.09% contact toxicity to larvae of S. frugiperda. It recommended to use emamectin benzoate, spinosad, chlorantraniliprole, and phoxim as the main ingredients, as well as combined with other above mentioned insecticides, for controlling of larvae of S. frugiperda.

Key words: Spodoptera frugiperda, insecticide, toxicity bioassay, leaf dipping method

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