Evaluating Efficacy and Chemical Concentrations of Commonly Used Insecticides Targeting Tarnished Plant Bug in Mid-South Cotton

IF 0.7 Q4 AGRICULTURAL ENGINEERING Journal of cotton science Pub Date : 2023-04-01 DOI:10.56454/hkrj8091
Jacob Smith, W. Crow, A. Catchot, J. Gore, D. Cook, F. Musser, S. Stewart, S. Brown, B. Thrash, G. Lorenz, N. Bateman, G. Studebaker, T. Towles, D. Kerns
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引用次数: 1

Abstract

Studies were conducted from 2017 to 2021 at nine locations across Arkansas, Louisiana, Mississippi, and Tennessee to evaluate efficacy, residual control, and effective chemical concentrations of commonly used insecticides targeting tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), nymphs in Mid-South cotton. Foliar applications of imidacloprid, flonicamid, thiamethoxam, oxamyl, dicrotophos, acephate, novaluron, and sulfoxaflor were applied at locally recommended rates. Plots were sampled for nymphs at 4, 7, and 10 d after treatments (DAT), and leaves were analyzed for concentration of active ingredients from plots located in one site in 2021 at 4, 7, 10, and 14 DAT. Across all sampling dates, insecticide treatments reduced nymph infestations compared to untreated control, except for imidacloprid at 10 DAT. All insecticide treatments resulted in higher lint yields compared to untreated control. Overall, sulfoxaflor, novaluron, and acephate offered the best control of nymphs and provided the greatest yield protection among treatments. Moderate control was achieved with thiamethoxam, oxamyl, and dicrotophos. Imidacloprid and flonicamid resulted in less control. Concentrations of flonicamid, thiamethoxam, dicrotophos, acephate, and novaluron persisted up to 14 DAT in leaves. Imidacloprid and oxamyl were not detected at 7, 10, or 14 DAT, and sulfoxaflor was not detected at 14 DAT in leaves. In these studies, control of tarnished plant bug nymphs never exceeded 75% regardless of insecticide or sampling date. The moderate efficacy and short residual control shown in these studies explain why multiple insecticide applications within short intervals are needed to manage heavy tarnished plant bug populations
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常用杀虫剂对中南棉脱胶虫的药效及化学浓度评价
2017年至2021年,在阿肯色州、路易斯安那州、密西西比州和田纳西州的九个地点进行了研究,以评估常用杀虫剂针对中南部棉花若虫的功效、残留控制和有效化学浓度。吡虫啉、氟硝胺、噻虫嗪、恶氨酰、双氯膦、乙酰甲胺磷、诺伐隆和磺基恶氟的叶面施用按当地推荐的速率施用。在处理(DAT)后4、7和10天对若虫的地块进行采样,并在2021年4、7、10和14天对位于一个地点的地块的叶片进行活性成分浓度分析。在所有采样日期,与未经处理的对照相比,杀虫剂处理减少了若虫侵扰,但10 DAT的吡虫啉除外。与未经处理的对照相比,所有杀虫剂处理都能提高皮棉产量。总的来说,磺基恶氟隆、诺伐隆和乙酰甲胺磷对若虫的控制效果最好,对产量的保护效果最好。噻虫嗪、恶氨酰和双氯膦实现了适度控制。吡虫啉和氟硝胺的防治效果较差。氟硝胺、噻虫嗪、双氯膦、乙酰甲胺磷和诺伐隆在叶片中的浓度持续高达14DAT。在7、10或14DAT时未检测到吡虫啉和恶氨酰,在14DAT处未检测到磺基恶唑。在这些研究中,无论杀虫剂或采样日期如何,对失去光泽的植物虫若虫的控制从未超过75%。这些研究中显示的中等疗效和短暂的残留控制解释了为什么需要在短时间内多次施用杀虫剂来管理严重受损的植物害虫种群
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来源期刊
Journal of cotton science
Journal of cotton science AGRICULTURAL ENGINEERING-
CiteScore
0.90
自引率
20.00%
发文量
0
期刊介绍: The multidisciplinary, refereed journal contains articles that improve our understanding of cotton science. Publications may be compilations of original research, syntheses, reviews, or notes on original research or new techniques or equipment.
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