Ecotoxicology (2021) 30, 1150-1160

Hina Gul, Farman Ullah, Muhammad Hafeez, Kaleem Tariq, Nicolas Desneux, Xiwu Gao and Dunlun Song (2021)
Sublethal concentrations of clothianidin affect fecundity and key demographic parameters of the chive maggot, Bradysia odoriphaga
Ecotoxicology 30 (6), 1150-1160
Abstract: Bradysia odoriphaga is a major insect pest that infests Chinese chive in northern China. Clothianidin is a second-generation neonicotinoid insecticide that is commonly used against B. odoriphaga. In this study, the effect of sublethal clothianidin concentrations (LC₅ and LC₁₀) on key biological characteristics of B. odoriphaga was investigated using an age-stage, two-sex life table method. Bioassays results showed that clothianidin exhibited high toxicity against B. odoriphaga with LC₅₀ of 1.898 mg L^-1 following 24 h exposure. The developmental duration of larvae was significantly increased when exposed to the LC₅ (0.209 mg L^-1) and LC₁₀ (0.340 mg L^-1) of clothianidin. No significant effects were observed on the pupal stage, adult pre-oviposition period (APOP), total pre-oviposition period (TPOP), and mean longevities of male and female. The oviposition period and fecundity of B. odoriphaga were reduced in clothianidin-treated groups. Moreover, key demographic parameters, including the intrinsic rate of increase (r), finite rate of increase (λ), and net reproductive rate (R₀), were significantly decreased by the LC₅ and LC₁₀ of clothianidin, while no effects were noted on mean generation time (T). Overall, this study showed that sublethal concentrations of clothianidin have a detrimental effect on B. odoriphaga developmental period, fecundity, and life table parameters. Therefore, clothianidin has the potential to suppress the population of B. odoriphaga even at sublethal concentrations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Nicolas Desneux, Xi-Wu Gao, Dun-Lun Song

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bradysia odoriphaga	Onion/garlic/leek (Allium)	China (NE)