Y. Wen, Huayue Meng, Chen Zhao
Jan 25, 2021
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Influential Citations
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Quality indicators
Journal
Pest management science
Abstract
BACKGROUND Chemical control is the most used and effective method to control Diaphorina citri (D. citri), the vector of the phloem-limited bacteria associated with citrus huanglongbing (HLB) disease. The objectives of this study were to determine the effectiveness of flupyradifurone applied via dripping irrigation systems on D. citri. Bioassays were conducted using leaves harvested on various dates post-treatment, and insecticide residue in leaf tissue was quantified. RESULTS The drip application of flupyradifurone on citrus trees provided high-level and long-term control against D. citri adult, and the LC50 for ingestion of flupyradifurone in D. citri was 22.22 mg/kg (fresh leaf). Residue of flupyradifurone was detected in leaf tissue within 3 days after treatment. The measured level of flupyradifurone peaked on the 40th day after application, and then showed a steady decline in subsequent days with all three applied dosages. The amounts of flupyradifurone in upper, middle, and lower leaves were similar, and the trends of change on concentration of flupyradifurone were consistent. CONCLUSIONS The results demonstrate that flupyradifurone can be a valuable new tool for D. citri management programs, and drip-applied flupyradifurone provides an extended period of control efficacy. This paper could provide a reference to reduce the dependence on foliar-applied insecticides, with associated benefits for non-target exposure to workers and pollinators. This article is protected by copyright. All rights reserved.