The combined effect of sublethal concentrations of insecticides and local entomopathogenic nematode isolates on larval and pupal stages of Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae)

Ahmed F. S., İNAK E., Helmy W. S., Abo-Shady N. M.

Crop Protection, cilt.184, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 184
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.cropro.2024.106856
  • Dergi Adı: Crop Protection
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Environment Index, Veterinary Science Database
  • Anahtar Kelimeler: Black cutworm, Heterorhabditis bacteriophora, Heterorhabditis indica, Indoxacarb, IPM, Lufenuron
  • Ankara Üniversitesi Adresli: Evet

Özet

The black cutworm (BCW), Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae), is an economically significant pest affecting numerous crops and turf grasses. Despite employing various methods, such as chemical and biological control, to mitigate this pest, the efficacy of these methods often fails to reach the desired level. Hence, the integration of diverse strategies is a key to sustainable management. In this study, we assessed the toxicity of four insecticides (indoxacarb, pyridalyl, lufenuron, and methoxyfenozide) and three local EPN isolates (two isolates of Heterorhabditis indica and one of Heterorhabditis bacteriophora) in targeting the fifth instar larval (L5) and pupal stages of BCW. After demonstrating their potential use in BCW control, we explored the combined use of sublethal concentrations of insecticides (LC15 or LC30) alongside the LC20 values of EPNs. The findings revealed that lufenuron and methoxyfenozide, when combined with EPNs, exhibited a synergistic effect on the L5 stage of BCW, whereas the same combination displayed antagonism on pupae. On the other hand, the combination of indoxacarb and pyridalyl with EPNs demonstrated a synergistic effect on the pupal stage of BCW. These results highlight the potential of employing a combination of insecticides and EPNs at sublethal concentrations to control BCW effectively. This approach shows promise for designing sustainable pest management strategies within the framework of integrated pest management (IPM).