Toxicity and Efficacy of Thirty Insecticides Against <i>Thrips flavus</i> in Northeast China: Laboratory, Semifield, and Field Trials
In soybean fields across Northeast China, <i>Thrips flavus</i> Schrank (Thysanoptera, Thripidae) populations are increasing, posing a significant threat to soybean production. The aim of this study was to evaluate the toxicity, insecticide efficacy, and field performance of thirty insect...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
|
| Series: | Insects |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4450/16/4/405 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | In soybean fields across Northeast China, <i>Thrips flavus</i> Schrank (Thysanoptera, Thripidae) populations are increasing, posing a significant threat to soybean production. The aim of this study was to evaluate the toxicity, insecticide efficacy, and field performance of thirty insecticides against <i>T. flavus</i>. Laboratory bioassays revealed that fenthion (LC<sub>50</sub> = 2.26 mg/L), sulfoxaflor (LC<sub>50</sub> = 4.28 mg/L), cyetpyrafen (LC<sub>50</sub> = 4.94 mg/L), and imidacloprid (LC<sub>50</sub> = 6.16 mg/L) exhibited the highest toxicity against <i>T. flavus</i>. Pot experiments were subsequently conducted to assess insecticide efficacy. Seven days after application at the highest tested concentration, the insecticide efficacy of fenthion, sulfoxaflor, chlorantraniliprole, bifenazate, and malathion achieved 100% control efficacy. The four insecticides were selected for field trials based on their high toxicity and insecticide efficacy. Seven days after application, the field efficacy of fenthion at 11.25 g a.i.·hm<sup>−2</sup>, sulfoxaflor at 1.19 g a.i.·hm<sup>−2</sup>, cyetpyrafen at 8.10 g a.i.·hm<sup>−2</sup>, and imidacloprid at 11.25 g a.i.·hm<sup>−2</sup> exceeded 80%. Thus, these four insecticides hold strong potential for integrated management of <i>T. flavus</i>. Overall, the findings provide a valuable reference for developing chemical control strategies against this pest. |
|---|---|
| ISSN: | 2075-4450 |