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<p>Turfgrass provides habitat to various arthropods, including beneficial arthropods, herbivores, and detritivores. Chemical control is an important tactic for managing major arthropod pests in turfgrass. However, the non-target effects of insecticides are poorly understood, especially with the availability of newer insecticides to turfgrass managers. This study aimed to determine the effects of commonly used insecticides targeting major turfgrass pests on beneficial arthropods. In 2022, two field trials were conducted on the bermudagrass (<i>Cynodon</i> spp.) in mid-Georgia (USA). The treatments included bifenthrin, chlorantraniliprole, tetraniliprole, imidacloprid, acephate plus imidacloprid, novaluron, and methoxyfenozide, which were applied to the bermudagrass. Arthropods were sampled using pitfall traps at 0, 3, 13, 21, and 28 days post-application. Imidacloprid, acephate + imidacloprid, and bifenthrin reduced the abundance of predaceous mirids, geocorids, and parasitic hymenopterans more than carabids, formicids, and Araneae. Methoxyfenozide, novaluron, tetraniliprole, and chlorantraniliprole were less disruptive to carabids, staphylinids, predaceous mirids, geocorids, formicids, parasitic hymenopterans, and Araneae. This information can be utilized to mitigate nontarget effects during pest management in turfgrass, thereby contributing to insect conservation and ultimately promoting biodiversity and functional resilience.</p>

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Commonly used insecticides can induce short-term impacts on abundance of beneficial arthropods in turfgrass

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月13日

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  • Mahesh Ghimire,
  • Shimat V. Joseph

摘要

Turfgrass provides habitat to various arthropods, including beneficial arthropods, herbivores, and detritivores. Chemical control is an important tactic for managing major arthropod pests in turfgrass. However, the non-target effects of insecticides are poorly understood, especially with the availability of newer insecticides to turfgrass managers. This study aimed to determine the effects of commonly used insecticides targeting major turfgrass pests on beneficial arthropods. In 2022, two field trials were conducted on the bermudagrass (Cynodon spp.) in mid-Georgia (USA). The treatments included bifenthrin, chlorantraniliprole, tetraniliprole, imidacloprid, acephate plus imidacloprid, novaluron, and methoxyfenozide, which were applied to the bermudagrass. Arthropods were sampled using pitfall traps at 0, 3, 13, 21, and 28 days post-application. Imidacloprid, acephate + imidacloprid, and bifenthrin reduced the abundance of predaceous mirids, geocorids, and parasitic hymenopterans more than carabids, formicids, and Araneae. Methoxyfenozide, novaluron, tetraniliprole, and chlorantraniliprole were less disruptive to carabids, staphylinids, predaceous mirids, geocorids, formicids, parasitic hymenopterans, and Araneae. This information can be utilized to mitigate nontarget effects during pest management in turfgrass, thereby contributing to insect conservation and ultimately promoting biodiversity and functional resilience.