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ISSN : 1225-0171(Print)
ISSN : 2287-545X(Online)
Korean Journal of Applied Entomology Vol.63 No.3 pp.253-263
DOI : https://doi.org/10.5656/KSAE.2024.08.0.031

Evaluation of Insecticidal Ingredients and Efficacy of Extracts from Pyrethrum Flowers Cultivated in South Korea

Ka Hee Cho†, Hyo Jeong Kim1†, Jang Hoon Lee2, Young Cheol Kim*
Department of Applied Biology, Chonnam National University, Gwangju 61186, Korea
1Environment-Friendly Agriculture Research Institute, Jeollanamdo Agricultural Research & Extension Services, Naju 58213, Korea
2Agricultural Solutions, BASF Korea Ltd., Seoul 04518, Korea

Abstract

Research on using plant extracts for eco-friendly pest control is being conducted worldwide to reduce reliance on chemical products. While pyrethrum plants are widely recognized as a source of pyrethrin for insecticides, studies focusing on the extraction and efficacy of products from Korean-grown plants remain limited. This study compared methods to extract pyrethrins from two pyrethrum varieties grown in Korea. Furthermore, it examined the efficacy of the isolated pyrethrin-containing extracts against three plant pests. Pyrethrin contents were significantly higher in pyrethrin preparations from Tanacetum cinerariifolium var. Dalmatian compared to a French-imported cultivar, Gyetong. Therefore, pyrethrin extracts from the Dalmatian variety were used for further studies. The amount of pyrethrins extracted increased with the ethanol concentration used for extraction, reaching the highest level (6,064 ppm/100 g dry flower mass) with 95% ethanol. Total pyrethrin content and the pyrethrin I/II ratio were highest in flowers harvested at full bloom. In vitro bioassays of the extract showed LC50 values of 34 ppm for green peach aphids, 69 ppm for cabbage diamondback moth larvae, and notably, 0.1 ppm for juveniles of the root-knot nematode. These findings indicate that the ethanol extract from Dalmatian flowers grown in Korea could serve as a valuable alternative for developing botanical pesticides. These results suggest the potential of extracts from Korean-grown T. cinerariifolium var. Dalmatian flowers in providing effective and eco-friendly control of plant pests in local agriculture.

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Vol. 40 No. 4 (2022.12)

Journal Abbreviation Korean J. Appl. Entomol.
Frequency Quarterly
Doi Prefix 10.5656/KSAE
Year of Launching 1962
Publisher Korean Society of Applied Entomology
Indexed/Tracked/Covered By