Evaluation of soil-applied insecticides for control of corn rootworm in Minnesota from 2020 – 2024

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2025-05-07 DOI:10.1016/j.cropro.2025.107268

Yucheng Wang , Bruce Potter , Travis Vollmer , Fei Yang

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引用次数: 0

Abstract

Corn rootworms (CRW) are among the most destructive pests in corn production across the Corn Belt, causing considerable damage through larval feeding on roots. While crop rotation and Bt technologies are widely adopted management strategies, their effectiveness is increasingly compromised by the pest's evolution of resistance and behavioral adaptability. Chemical insecticides applied at planting to target larvae directly serve as an additional tool for corn rootworm control. In this study, we evaluated the performance of various insecticides, applied in-furrow, for managing corn rootworms by assessing Node Injury Scale (NIS), lodging rates, and grain yields from 2020 to 2024. We found that Mode of Action (MOA) 3A insecticides (sodium channel modulators), such as Force Evo (tefluthrin) and Capture LFR (bifenthrin), did not provide substantial efficacy in reducing NIS and lodging rates. In contrast, MOA 1B+3A insecticides (acetylcholinesterase (AChE) inhibitors + sodium channel modulators), such as INDEX (chlorethoxyfos + bifenthrin) and AZTEC HC (tebupirimphos + cyfluthrin), significantly reduced CRW larval damage, particularly under high pest pressure in 2020, 2021 and 2023. Differences in insecticide concentrations did not significantly impact larval control efficacy. Additionally, seasonal rainfall during larval hatching and variation in cumulative corn growing degree days (GDD) strongly influenced the root injury and lodging outcomes. Lower GDD likely limits root regeneration, increasing lodging risk under CRW pressure. These findings demonstrate the values of in-furrow insecticides in managing corn rootworms, particularly under high pest pressure and provide valuable insights for developing integrated pest management strategies to sustain effective CRW larval control and improve crop productivity.

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2020 - 2024年明尼苏达州玉米根虫土壤施药效果评价

玉米根虫（CRW）是玉米带玉米生产中最具破坏性的害虫之一，其幼虫以根为食，造成相当大的损害。虽然作物轮作和Bt技术是广泛采用的管理策略，但它们的有效性越来越受到害虫抗性和行为适应性进化的影响。种植时直接施用化学杀虫剂，可作为防治玉米根虫的一种辅助手段。在本研究中，我们通过评估2020 - 2024年玉米根虫的节点伤害等级（NIS）、倒伏率和粮食产量，评估了不同杀虫剂在玉米沟内施用的效果。我们发现，作用模式（MOA） 3A杀虫剂（钠通道调节剂），如Force Evo（氟菊酯）和Capture LFR（联苯菊酯），在降低NIS和倒伏率方面没有显著的效果。相比之下，MOA 1B+3A杀虫剂（乙酰胆碱酯酶（AChE）抑制剂+钠通道调节剂），如INDEX（氯甲氧虫+联苯菊酯）和AZTEC HC（虫腈磷+氟氯菊酯），显著降低了CRW幼虫的伤害，特别是在2020年、2021年和2023年的高虫害压力下。杀虫剂浓度差异对幼虫防治效果无显著影响。此外，幼虫孵化期间的季节性降雨和玉米累积生长度数（GDD）的变化对根系伤害和倒伏结果有重要影响。较低的gdp可能会限制根系再生，增加CRW压力下倒伏的风险。这些发现证明了沟内杀虫剂在管理玉米根虫方面的价值，特别是在高病虫害压力下，并为制定综合病虫害管理策略提供了有价值的见解，以维持有效的CRW幼虫控制和提高作物生产力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.