Toxicity of Cinnamomum spp. essential oil to Tuta absoluta and to predatory mirid

The South American tomato pinworm Tuta absoluta (Meyrick, 1971) (Lepidoptera: Gelechiidae) causes economic losses in solanaceous crops. Chemical pesticides are the main management methods used against this pest, which causes the emergence of resistances in pest populations. Therefore, it is crucial...

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Bibliographic Details
Published in:Journal of pest science 2024-06, Vol.97 (3), p.1569-1585
Main Authors: de Figueiredo, Karolina Gomes, de Paiva Silva, Gabriel Tadeu, Passos, Luis Clepf, Alves, Dejane Santos, Biondi, Antonio, Carvalho, Geraldo Andrade
Format: Article
Language:English
Subjects:
Agriculture
Biocompatibility
Biological control
Biomedical and Life Sciences
Chemical pest control
Cinnamaldehyde
Cinnamomum
Ecology
Economic impact
Entomology
Essential oils
Fecundity
Forestry
Larvae
Life cycles
Life Sciences
Linalool
Management methods
Mortality
Oils & fats
Original Paper
Oviposition
Pest control
Pesticides
Pests
Plant Pathology
Plant Sciences
Predators
Sublethal effects
Tomatoes
Toxicity
Tuta absoluta
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Summary:The South American tomato pinworm Tuta absoluta (Meyrick, 1971) (Lepidoptera: Gelechiidae) causes economic losses in solanaceous crops. Chemical pesticides are the main management methods used against this pest, which causes the emergence of resistances in pest populations. Therefore, it is crucial to identify and develop new molecules showing toxicity to T. absoluta while being less harmful to the environment, to beneficial organisms and to human health. The objective of this study was to evaluate the lethal and sublethal effects of three essential oils (EOs) of Cinnamomum spp. (Lauraceae) against T. absoluta . We evaluated the effects of the EOs during the life cycle of the pest using an age-stage, two-sex life table. We assessed leaf consumption by T. absoluta treated with EOs or the main compounds found in EOs, cinnamaldehyde and linalool. Additionally, we investigated the toxicity of the EOs to the predator Macrolophus basicornis (Stal, 1860) (Hemiptera: Miridae). Our findings indicate that EOs significantly decreased the duration of all life cycle stages of T. absoluta in 5 days, as well as fecundity by 55%, oviposition period by 2 days and viability of second generation eggs by 50%. Cinnamaldehyde and linalool resulted in 83.3% and 86.7% mortality, respectively, of T. absoluta larvae, showing that these major EO compound significantly contribute to EO insecticidal activity. However, all three EOs caused between 43 and 53% of mortality to M. basicornis . Although Cinnamomum essential oils show great insecticidal potential for T. absoluta , they may not be compatible with other IPM tools such as the use of biocontrol agents when used at the LD 50 for T. absoluta .
ISSN:1612-4758
1612-4766
DOI:10.1007/s10340-023-01719-0