Insects (2021) 12 (8 - 696)

Panagiotis J. Skouras, nastasios I. Darras, Marina Mprokaki, Vasilios Demopoulos, John T. Margaritopoulos, Costas Delis and George J. Stathas (2021)
Toxicity, sublethal and low dose effects of imidacloprid and deltamethrin on the aphidophagous predator Ceratomegilla undecimnotata (Coleoptera: Coccinellidae)
Insects 12 (8 - 696)
Abstract: Ceratomegilla undecimnotata (Coleoptera: Coccinellidae) is a common aphidophagous coccinellid predator used in biological control against aphid pests. Knowing toxicity, lethal, and sublethal effects of insecticides on natural enemies is essential in order to incorporate them into Integrated Pest Management (IPM). In the present study, the lethal and sublethal effects of imidacloprid and deltamethrin were evaluated on the fourth instar larvae of C. undecimnotata and subsequently on the full life cycle. Our results strongly suggest that sublethal and low doses of imidacloprid and deltamethrin at LD₁₀ and LD₃₀ affected fourth instar larvae duration time, adult preoviposition period, total preoviposition period, and fecundity. Moreover, the intrinsic (r) and finite (λ) rate of increase and the net reproduction rate (R₀) significantly decreased in populations treated with imidacloprid compared to the control population. The data clearly suggest that imidacloprid and deltamethrin have a negative influence on population growth parameters of C. undecimnotata at sublethal and low doses and, therefore, these insecticides should be used with caution within the context of IPM.
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Database assignments for author(s): Panagiotis J. Skouras, John T. Margaritopoulos

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Ceratomegilla undecimnotata (predator)			Greece