Field efficacy of insecticides for management of invasive fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) on maize in India

Authors

  • Sharanabasappa Deshmukh Department of Entomology, College of Agriculture, University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India
  • H. B. Pavithra Department of Entomology, College of Agriculture, University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India
  • C. M. Kalleshwaraswamy Department of Entomology, College of Agriculture, University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India
  • B. K. Shivanna Department of Entomology, College of Agriculture, University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India
  • M. S. Maruthi Department of Entomology, College of Agriculture, University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India
  • David Mota-Sanchez Department of Entomology, Michigan State University, 1129 Farm Lane Room B18, Food Safety and Toxicology Building, East Lansing, Michigan 48824, USA

Abstract

The invasive fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), was reported for the first time causing severe damage on maize in Karnataka, India, during May 2018. Thereafter, the pest has spread to most states of India and then spread to other Asian countries, including Thailand, Sri Lanka, Bangladesh, Myanmar, Vietnam, Laos, and China. Being a new invasive, there is no information on its susceptibility to insecticides. Hence, insecticides having different modes of action were evaluated for control of second instar larvae by the leaf-dip bioassay method, as well as under field conditions both in Jun and Sep. Emamectin benzoate 5 SG showed the highest acute toxicity, followed by chlorantraniliprole18.5 SC, and spinetoram 11.7 SC, whereas toxicities of flubendiamide 480 SC, indoxacarb 14.5 SC, lambda-cyhalothrin5 EC, and novaluron10 EC were at par by the leaf-dip bioassay. The results of field efficacy for 2 planting dates (Jun sown crop, and Sep sown crop 2018) revealed that the effective insecticides were chlorantraniliprole 18.5 SC, followed by emamectin benzoate 5 SG, spinetoram 11.7 SC, flubendiamide 480 SC, indoxacarb 14.5 SC, lambda cyhalothrin 5 EC, and novaluron 10 EC. Higher efficacy also was correlated with higher grain yield in comparison with the control. Chlorantraniliprole, emamectin benzoate, and spinetoram are suitable as one of the components of Integrated Pest Management of fall armyworm in India.

 

Resumen

El cogollero, Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae), fue reportado por primera vez causando daños severos en el maíz en Karnataka, India, durante mayo del 2018. Luego, la plaga se ha extendido a la mayoría de los Estados de la India y luego se extendió a otros países asiáticos, incluidos Tailandia, Sri Lanka, Bangladesh, Myanmar, Vietnam, Laos, y China. Al ser un nuevo invasor, no hay información sobre su susceptibilidad a insecticidas. Por lo tanto, los insecticidas que tienen diferentes modos de acción fueron evaluados para el control de las larvas del segundo estadio por el método de bioensayo por inmersión de las hojas, así como en condiciones de campo durante los meses de junio y septiembre. El benzoato de emamectina 5 SG mostró la toxicidad aguda más alta seguida por clorantraniliprol 18.5 SC y spinetoram 11.7 SC, mientras que las toxicidades de flubendiamida 480 SC, indoxacarb 14.5 SC, lambda-cyhalothrin5 EC, y novaluron10 EC estaban a la par por el bioensayo de inmersión foliar. Los resultados de la eficacia de campo para 2 fechas de siembra (cultivo sembrados en los meses de junio y septiembre del 2018) revelaron que los insecticidas efectivos fueron clorantraniliprol 18.5 SC, seguido de benzoato de emamectina 5 SG, spinetoram 11.7 SC, flubendiamida 480 SC, indoxacarb 14.5 SC, lambda cyhalothrin 5 EC y novaluron 10 EC. Se correlacionó una mayor eficacia también con un mayor rendimiento de grano en comparación con el control. El clorantraniliprol, el benzoato de emamectina y el espinetoram son adecuados como un componente para el Manejo Integrado de Plagas del cogollero en la India.

Key Words: larval population; bioassay; efficacy; yield

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Published

2020-07-09

Issue

Vol. 103, No. 2 (June 2020)

Section

Research Papers

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