Journal
AGRONOMY-BASEL
Volume 12, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/agronomy12071656
Keywords
isoxazoline; life table; Plutella xylostella; sublethal exposure; toxicity; transgenerational effect; detoxification enzyme; fitness cost
Categories
Funding
- Indian Council of Agricultural Research-Agricultural Technology Application Research Institute (ATARI), Kolkata, India [F/4(2)/ATARI/Kol/BE/Res8/2021]
Ask authors/readers for more resources
This study assessed the toxicity and sublethal effects of fluxametamide on diamondback moth Plutella xylostella, and found that sublethal concentrations of fluxametamide can suppress the reproduction, development, and survival of the pest population.
Fluxametamide, a novel isoxazoline insecticide, is newly registered for the control of various lepidopteran, coleopteran and thysanopteran insect pests on lethal and sublethal levels. In the present study, the toxicity and sublethal effects of fluxametamide on diamondback moth Plutella xylostella (L.), an invasive lepidopteran foliage feeder of cruciferous vegetables, were assessed to explore its bio-ecological impact on pest populations. The toxicity of fluxametamide to the third instar larvae of P. xylostella was 0.18 mg L-1 (LC50) at 72 h bioassay. After treatment with LC10 and LC30 concentrations of fluxametamide, the fourth instar larval duration, the rate of deformed pupa and adults, and the adult pre-oviposition period were significantly increased, whereas the pupation rate and pupal weight were significantly decreased in the F-0 generation. In the F-1 generation, sublethal effects of fluxametamide were indicated by a reduced fecundity, rate of pupation and adult emergence, pupal weight, and adult longevity, however a significant increase in eggs and total larval duration, deformed adults rate, and total longevity and pre-oviposition period was observed in the offspring. The intrinsic rate of increase (r), finite rate of increase (lambda) and net reproductive rate (R-0) of sublethal treatments were significantly lower than the control. The relative fitness of F-1 was 0.68 and 0.64 in LC10 and LC30 treatments, respectively. The LC30 fluxametamide treatment exhibited increased glutathione S-transferase activities (elevated 1.433-fold) in P. xylostella. Our results suggest that in addition to its high lethal toxicity, the sublethal concentrations of fluxametamide might suppress the reproduction, development and survival of the P. xylostella population and its progeny, which can help to optimize integrated pest management program.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available