Residue behavior and efficacy of benzothiazole in grains under different fumigation conditions

Author:

Cui Kaidi1,Zhou Lin1ORCID,Jiang Chaofan1,Yang Song2,Zou Nan3,Liu Feng3ORCID,He Leiming1,Mu Wei3ORCID

Affiliation:

1. Henan Key Laboratory of Creation and Application of New Pesticides, College of Plant Protection Henan Agricultural University Zhengzhou China

2. Jiangsu Product Quality Testing & Inspection Institute Nanjing China

3. Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection Shandong Agricultural University Tai'an China

Abstract

AbstractBackgroundBenzothiazole is a potential grain fumigant for Tribolium castaneum. However, its safety profile and suitable fumigation conditions remain unknown. We therefore investigated the insecticidal efficacy, accumulation and dissipation of benzothiazole in grains (wheat, corn and rice) under different temperatures.ResultsWe established a universal detection method (modified QuEChERS coupled with GC–MS/MS) of benzothiazole residues in three grains, which provided high linearity (R2 > 0.999), sensitivity (limits of detection = 0.001 mg/kg, limits of quantification = 0.002–0.005 mg/kg), accuracy (recoveries = 88.18–118.75%) and precision (relative standard deviations < 4.78%). The insecticidal efficacy order of benzothiazole was 30 ≥ 10 > 20 °C and corn > wheat > rice. Temperature positively affected the accumulation/dissipation rate of benzothiazole. Rice was the most easily accumulated and dissipated grain for benzothiazole residues, while corn accumulated benzothiazole more than wheat but less than rice, with dissipation slower than wheat and rice.ConclusionOur results provide important references for the application of benzothiazole and other fumigants. © 2023 Society of Chemical Industry.

Funder

National Key Research and Development Program of China

Publisher

Wiley

Subject

Insect Science,Agronomy and Crop Science,General Medicine

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