Field Efficacy of Different Insecticides Against Fall Armyworm (Spodoptera frugiperda J.E. Smith) in Spring Maize (Zea mays L.)

Nikita Karki; Ankit Soti; Shambhu Katel; Rachana Bhandari; Niru Thapa; Shubh Pravat Singh Yadav

doi:10.59983/s2023010202

Nikita Karki ¹ , Ankit Soti ² , Shambhu Katel ³ , Rachana Bhandari ⁴ , Niru Thapa ⁵ , Shubh Pravat Singh Yadav ⁶

¹ G.P. Koirala College of Agriculture and Research Centre, Purbanchal University, Gothgaun, Morang 56600, Nepal
² Gauradaha Agriculture Campus, Gauradaha, Jhapa 57216, Nepal
³ G.P. Koirala College of Agriculture and Research Centre, Purbanchal University, Gothgaun, Morang 56600, Nepal https://orcid.org/0000-0001-6956-3934
⁴ G.P. Koirala College of Agriculture and Research Centre, Purbanchal University, Gothgaun, Morang 56600, Nepal
⁵ G.P. Koirala College of Agriculture and Research Centre, Purbanchal University, Gothgaun, Morang 56600, Nepal
⁶ G.P. Koirala College of Agriculture and Research Centre, Purbanchal University, Gothgaun, Morang 56600, Nepal

✉ Author responsible for correspondence: This information is protected, please see article PDF.

doi 10.59983/s2023010202

Abstract

An experiment was conducted from February to June 2022 to determine the effectiveness of different insecticides in controlling fall armyworm (Spodoptera frugiperda: FA) under field conditions. The experiment followed a randomized complete block design (RCBD) with 5 treatments and 4 replications. Insecticides were applied three times at 7-day intervals. The treatments included: T1 - untreated or control (water spray), T2 - Cypermethrin 5% + Chlorpyriphos 50% EC, T3 - Chlorantraniliprole 18.5% SC, T4 - Emamectin Benzoate 5% SG, and T5 - Spinetoram 11.7% SC. Data were collected for the number of live larvae, damage to the top four leaves and whorls, and yield attributes. The results showed that the lowest FA infestation was observed in the plots treated with Chlorantraniliprole 18.5% SC, while the highest infestation was observed in the control group. The highest yield (7.52 t/ha) was obtained from the Emamectin Benzoate treatment, while the lowest yield (5.74 t/ha) was recorded in the control group. Among the different control measures, spraying Chlorantraniliprole 18.5% SC at 7-day intervals was found to be the most effective method to control FA in spring maize variety TX-369, achieving 100% efficacy. These results provide valuable guidance to growers in selecting effective insecticides for FA control. This study addresses the challenge of FA management in maize crops while aligning with multiple Sustainable Development Goals (SDGs).

Keywords:

efficacy, fall armyworm, insect-pest infestation, spring maize

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