Bioactivities of scent gland chemicals from Mictis fuscipes Hsiao (Hemiptera: Coreidae) on Solenopsis invicta Buren (Hymenoptera: Formicidae)

BACKGROUND Given the chemical diversity within stink bugs scent glands, they can be convenient models for bioprospecting novel pest control products. Preliminary behaviour observations indicated that adult Mictis fuscipes stink bugs secrete liquid droplets when defending against Solenopsis invicta f...

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Published in:Pest management science 2024-06, Vol.80 (6), p.2892-2904
Main Authors: Zhong, Jiamei, Fox, Eduardo G. P., Ling, Siquan, Yan, Zheng, Xu, Jinzhu, Yang, Hua, Hong, Ziqiong, Qin, Changsheng, Qiu, Hualong
Format: Article
Language:English
Subjects:
Acetates
Acetic acid
Adults
agricultural pest
Animals
Ants
Ants - drug effects
Biocompatibility
Biological activity
Bioprospecting
Chemical composition
Chromatography
Components
Electrophysiology
Eugenol
Female
Females
Fire Ants
Fires
Glands
Hemiptera - drug effects
Hemiptera - physiology
Heteroptera - drug effects
Heteroptera - physiology
Hexanoic acid
invasive fire ants
Male
metathoracic gland ejections
Pentatomidae
Pest control
Pesticides
Repellents
Scent gland
Scent Glands - chemistry
Secretion
Secretions
Solenopsis invicta
Toxicity
toxins
volatile allochemical
Volatile compounds
Volatiles
Workers (insect caste)
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Summary:BACKGROUND Given the chemical diversity within stink bugs scent glands, they can be convenient models for bioprospecting novel pest control products. Preliminary behaviour observations indicated that adult Mictis fuscipes stink bugs secrete liquid droplets when defending against Solenopsis invicta fire ants, killing them within minutes. Hence, this study aimed to analyse the chemical composition of the metathoracic scent gland secretions of M. fuscipes adults, as well as assess their biological activities against fire ants. RESULTS Bioassaying fire ants against secretions of several local stink bugs confirmed that the defensive secretions of two Mictis species are significantly more lethal, where M. fuscipes was the most lethal. Volatiles chromatography analysis indicated the secretions of female and male M. fuscipes stink bugs contains 20 and 26 components, respectively, chiefly hexanoic acid and hexyl hexanoate. Five compounds were consistently present in the secretion of female adults: hexyl hexanoate, hexanoic acid, hexyl acetate, hexyl butyrate, and eugenol. These yielded a strong electrophysiological antennal (EAD) response from S. invicta workers, female alates and males, where hexyl acetate showed the strongest response. The combination of these five compounds proved strongly repellent to S. invicta. When tested singly, hexanoic acid, hexyl butyrate, hexyl hexanoate, and eugenol were repellent to S. invicta, but hexyl acetate seemed slightly attractive. Additionally, the same mixture of five components exhibited strong contact and fumigant toxicity towards S. invicta workers, eugenol being the strongest. CONCLUSION Defensive chemicals of M. fuscipes exhibit robust biological activity against S. invicta and could inspire the development of biopesticides. © 2024 Society of Chemical Industry. Mictis fuscipes can effectively knock down and kill Solenopsis invicta. Adult M. fuscipes secretions predominantly contain hexanoic acid and hexyl hexanoate, confering repellent and toxic activity against fire ants.
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.7997