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Mishra R, Mishra HP, Pradhan SS, Guru-Pirasanna-Pandi G, Gowda GB, Patil NB, Annamalai M, Rath PC, Adak T. Residue dynamics and bio-efficacy of triflumezopyrim against Nilaparvata lugens and non-targeted effect on natural enemies in a rice ecosystem. Environ Sci Pollut Res Int 2022; 29:30206-30216. [PMID: 34997925 DOI: 10.1007/s11356-022-18551-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
Triflumezopyrim (TMP), a mesoionic insecticide, is commonly used for controlling planthoppers in rice. However, the relationship between the TMP residue and toxicity against brown planthoppers (BPHs) has not been studied in detail. We are reporting the dissipation of TMP from rice plant and soil under field conditions. The median lethal dose and median lethal concentration were 0.036 ng per insect and 0.525 mg L-1, respectively. TMP at recommended dose (25 g a.i. ha-1) recorded 1.25 live BPH per hill as against 25.5 per hill in control at 14 days after treatment. TMP was considered to be harmless to the natural enemies, namely, Cyrtorhinus lividipennis and Lycosa pseudoannulata in the rice ecosystem. The residue of TMP from rice plant and soil was estimated using the QuEChERS method using three different doses (12.5, 25, and 50 g a.i. ha-1). The limit of quantitation (LOQ) of TMP in plant and soil was 5 µg kg-1 and 1 µg kg-1, respectively. The maximum content of TMP in soil was less than 1% that of plant content on day 1. The dissipation pattern of TMP both from plant and soil was better explained by the first-order double-exponential decay model (FODED) as compared to the first-order kinetic model. Overall, the half-lives of TMP were ranged from 2.21 to 3.02 days in plant tissues and 3.78 to 4.79 days in soil as per the FODED model. Based on the persistence and toxicity of TMP, we could conclude that TMP will be effective against BPH up to 7-10 days after application. Triflumezopyrim with reasonable persistence and high efficacy could be recommended as an alternate pesticide in BPH management in rice.
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Affiliation(s)
- Ritesh Mishra
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, 753006, Odisha, India
- Department of Entomology, College of Agriculture, OUAT, Bhubaneswar, Odisha, 751003, India
| | - Hara Prasad Mishra
- Department of Entomology, College of Agriculture, OUAT, Bhubaneswar, Odisha, 751003, India
| | - Sophia Subhadarsini Pradhan
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, 753006, Odisha, India
- Ravenshaw University, Cuttack, Odisha, 753003, India
| | | | - Gadratagi Basana Gowda
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, 753006, Odisha, India
| | - Naveenkumar B Patil
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, 753006, Odisha, India
| | - Mahendiran Annamalai
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, 753006, Odisha, India
| | - Prakash Chandra Rath
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, 753006, Odisha, India
| | - Totan Adak
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, 753006, Odisha, India.
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