The Insecticidal Efficacy and Physiological Action Mechanism of a Novel Agent GC16 against Tetranychus pueraricola (Acari: Tetranychidae)

Chemical control plays a crucial role in pest management but has to face challenges due to insect resistance. It is important to discover alternatives to traditional pesticides. The spider mite (Ehara & Gotoh) (Acari: Tetranychidae) is a major agricultural pest that causes severe damage to many...

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Bibliographic Details
Published in:Insects (Basel, Switzerland) Switzerland), 2022-05, Vol.13 (5), p.433
Main Authors: He, Yanyan, Du, Guangzu, Xie, Shunxia, Long, Xiaoming, Sun, Ganlin, Zhu, Shusheng, He, Xiahong, Liu, Yixiang, Zhu, Youyong, Chen, Bin
Format: Article
Language:English
Subjects:
Abnormalities
Acari
Acaricides
action mechanism
Agriculture
Bioassays
Biodiversity
Calcium chloride
Chemical control
Chemical pest control
Crop damage
Damage
Dehydration
Eggs
Epicuticle
Females
Food additives
GC16
Harmonia axyridis
insecticidal activity
Insecticide resistance
Insects
Larvae
Lecithin
Lethal effects
Microscopy
Mites
Mitochondria
Mode of action
Mortality
Organelles
Pest control
Pest resistance
Pesticides
Pests
Physiology
Picromerus lewisi
Scanning electron microscopy
Sustainable agriculture
Synergistic effect
Tetranychidae
Tetranychus pueraricola
Toxicity
Transmission electron microscopy
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Summary:Chemical control plays a crucial role in pest management but has to face challenges due to insect resistance. It is important to discover alternatives to traditional pesticides. The spider mite (Ehara & Gotoh) (Acari: Tetranychidae) is a major agricultural pest that causes severe damage to many crops. GC16 is a new agent that consists of a mixture of Calcium chloride (CaCl ) and lecithin. To explore the acaricidal effects and mode of action of GC16 against , bioassays, cryogenic scanning electron microscopy (cryo-SEM) and transmission electron microscopy (TEM) were performed. GC16 had lethal effects on the eggs, larvae, nymphs, and adults of , caused the mites to dehydrate and inactivate, and inhibited the development of eggs. GC16 displayed contact toxicity rather than stomach toxicity through the synergistic effects of CaCl with lecithin. Cryo-SEM analysis revealed that GC16 damaged by disordering the array of the cuticle layer crest. Mitochondrial abnormalities were detected by TEM in mites treated by GC16. Overall, GC16 had the controlling efficacy on by cuticle penetration and mitochondria dysfunction and had no effects on and , indicating that GC16 is likely a new eco-friendly acaricide.
ISSN:2075-4450
2075-4450
DOI:10.3390/insects13050433