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Open Access

ARTICLE

A Preliminary Study on Controlling Chilo suppressalis in Rice Fields Using Precision Timing and Insecticide Combinations

Li Wang1,2, Jinfeng Zhang2, Binbin Li2, Zhengbo Pen3, Zhiyuan Yang3,*, Anshu Rastogi4,*
1 Department of Municipal and Ecological Engineering, Shanghai Urban Construction Vocational College, Shanghai, China
2 Department of Modern Agriculture, Meishan Vocational and Technical College, Sichuan, China
3 Rice Research Institute, Sichuan Agricultural University, Sichuan, China
4 Department of Bioclimatology, Poznan University of Life Sciences, Poznan, Poland
* Corresponding Author: Zhiyuan Yang. Email: email; Anshu Rastogi. Email: email
(This article belongs to the Special Issue: Crop Managements and Crop Adversity: Strategies, Mechanisms, and Implements)

Phyton-International Journal of Experimental Botany https://doi.org/10.32604/phyton.2026.075709

Received 06 November 2025; Accepted 20 January 2026; Published online 03 February 2026

Abstract

Chilo suppressalis (Walker) is one of the most important rice pests worldwide, posing a significant challenge to effective control. To develop a precision-timed, eco-friendly management strategy, overwintering population investigation and dynamic monitoring of C. suppressalis populations were conducted in the Meishan region of Sichuan, China, from 2023 to 2024. The optimal timing for insecticide application was estimated, followed by field trials evaluating the efficacy of different insecticides. Results demonstrated that the peak emergence of first-generation adults typically occurred in early July (under the environmental conditions of the Meishan region), with the ambient humidity below 75% and temperature around 29°C. Pesticide efficacy trials show that insecticide combinations exhibited superior control. Notably, a combined treatment of emamectin benzoate·methoxyfenozide + chlorantraniliprole achieved the highest control efficacy (90.05%) and a corresponding yield of 12,491.55 kg/ha. All tested treatments were determined to be safe for rice growth. Furthermore, this optimized strategy resulted in notable economic benefits, including a 50% reduction in pesticide usage and cost savings of 4796.15 CNY compared to conventional practices. This study provides valuable insights into sustainable rice production and pest management and, for the first time, proposes a precision application time window based on intelligent monitoring.

Keywords

Chilo suppressalis; rice; precision timing; emamectin benzoate; chlorantraniliprole

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