Amaral Fernando Semmelroth de Assunção E, Kanno Rubens Hideo, Nascimento Antonio Rogério Bezerra do, Guidolin Aline Sartori, Omoto Celso
Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba 13418-900, Brazil.
Insects. 2023 Jan 26;14(2):129. doi: 10.3390/insects14020129.
Susceptibility monitoring to insecticides is a key component to implementing insecticide resistance management (IRM) programs. In this research, the susceptibility to teflubenzuron in (J.E Smith) was monitored in more than 200 field-collected populations from major corn-growing regions of Brazil, from 2004 to 2020. Initially, we defined a diagnostic concentration of 10 µg mL of teflubenzuron using a diet-overlay bioassay for monitoring the susceptibility. A variation in the susceptibility to teflubenzuron in was detected among populations from different locations. We also detected a significant reduction in the susceptibility to teflubenzuron throughout time in all the populations of evaluated, with larval survival at diagnostic concentration varying from values of <5% in 2004 to up 80% in 2020. Thus, this research provides evidence of field-evolved resistance of to teflubenzuron and reinforces that IRM practices are urgently needed to be implemented in Brazil.
杀虫剂敏感性监测是实施抗药性管理（IRM）计划的关键组成部分。在本研究中，于2004年至2020年期间，对从巴西主要玉米种植区采集的200多个田间种群进行了对氟苯脲（J.E Smith）的敏感性监测。最初，我们使用饲料涂抹生物测定法确定了10 µg/mL氟苯脲的诊断浓度以监测敏感性。在来自不同地点的种群中检测到了对氟苯脲敏感性的差异。我们还在所有评估的种群中检测到随着时间推移对氟苯脲的敏感性显著降低，诊断浓度下的幼虫存活率从2004年的<5%变化到2020年的高达80%。因此，本研究提供了田间种群对氟苯脲产生抗性的证据，并强调巴西迫切需要实施IRM措施。
