Prasannakumar_2023_Pestic.Biochem.Physiol_190_105329

Reference

Title : Insecticidal properties of Ocimum basilicum and Mentha piperita essential oils against South American Tomato moth, Phthorimaea absoluta (Meyrick) (Lepidoptera: Gelichiidae) - Prasannakumar_2023_Pestic.Biochem.Physiol_190_105329
Author(s) : Prasannakumar NR , Jyothi N , Saroja S , Lokesha AN
Ref : Pestic Biochem Physiol , 190 :105329 , 2023
Abstract :

Phthorimaea absoluta (Meyrick) is one of the most destructive pests of tomato, causing 100% yield loss in the absence of control measures. The important method of managing the pest is by using synthetic insecticides. However, intermittent and indiscriminate uses of certain insecticides have negative effect on the environment. Use of herbal insecticides such as secondary metabolites and essential oils is a key for sustainable long term crop protection. Investigation on the insecticidal properties of Ocimum basilicum, Mentha piperita essential oils (EOs) and their constituents was carried out against P. absoluta. The M. piperita EO showed highest mortality (100%) of P. absoluta with LC(50) 1.78 microl/ml due to alloaromadendrene (27.99%), levomenthol (18.31%) and santolina triene (9.78%). The O. basilicum EO also had significant mortality (90%) effect with LC(50) 3.58 microl/ml due to humulene (32.31%), alpha farnesense (27.22%), estragole (19.24%) and 4-cerene (10.61%). Among binary compounds, levomenthol showed highest mortality (100%) having LC(50) 13.18 microl/ml followed by alpha-pinene (100%) with LC(50) 16.10 microl/ml, 4-cerene (95%) with LC(50) 38.20 microl/ml and alpha-phellandrene (90%) having LC(50) 46.83 microl/ml. The observed toxicity in all compounds was due to significant changes in the activity of esterases, glutathione S-transferase and acetylcholine esterases over the time. The present study suggests that O. basilium and M. piperita EOs would provide an additional approach for the management of P. absoluta over synthetic insecticides.

PubMedSearch : Prasannakumar_2023_Pestic.Biochem.Physiol_190_105329
PubMedID: 36740335

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Prasannakumar NR, Jyothi N, Saroja S, Lokesha AN (2023)
Insecticidal properties of Ocimum basilicum and Mentha piperita essential oils against South American Tomato moth, Phthorimaea absoluta (Meyrick) (Lepidoptera: Gelichiidae)
Pestic Biochem Physiol 190 :105329

Prasannakumar NR, Jyothi N, Saroja S, Lokesha AN (2023)
Pestic Biochem Physiol 190 :105329