CK2ZGU9T

3392

21 avril 2021 10:40

21 avril 2021 10:40

Blowflies play a substantial role as vectors of microorganisms, including human pathogens. The control of these insect pests is an important aspect of the prevention of foodborne diseases, which represent a significant public health threat worldwide. Among aromatic plants, spices essential oils (EOs) are the most suitable to protect food from insect pests. In this study, we determined the chemical composition of three oregano EOs and assessed their toxicity and deterrence to oviposition against the blowfly Calliphora vomitoria L. The chemical analyses showed that the EOs belonged to three chemotypes: one with a prevalence of carvacrol, the carvacrol chemotype (CC; carvacrol, 81.5%), and two with a prevalence of thymol, the thymol/p-cymene and thymol/γ-terpinene chemotypes (TCC and TTC; thymol, 43.8, and 36.7%, respectively). The bioassays showed that although all the three EOs chemotypes are able to exert a toxic activity against C. vomitoria adults (LD50 from 0.14 to 0.31 μL insect−1) and eggs (LC50 from 0.008 to 0.038 μL cm−2) as well as deter the oviposition (Oviposition Activity Index, OAI, from 0.40 ± 0.04 to 0.87 ± 0.02), the bioactivity of oregano EOs significantly varies among the chemotypes, with the thymol-rich EOs (TCC and TTC) overall demonstrating more effectiveness than the carvacrol-rich (CC) EO.

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• AB - Utile à l'AB
• FREDO alimentation humaine
• FREDO biologie des nuisibles
• FREDO conservation des productions
• FREDO lutte
• GEO Italie
• huile essentielle

• origanum vulgare
• diptera
• botanical insecticides
• chemotypes
• essential oils
• foodborne disease
• repellent

Insects

12

52

2021/1

22 janvier 2021

10.3390/insects12010052 Le DOI est une URL unique de référencement d'une publication. Il est donc plus fiable et permanent qu'une URL classique