Evaluation of population fluctuations of the lily beetle Lilioceris faldermanni (Guérin-Méneville,1829) (Coleoptera: Chrysomelidae) and introduction of its natural enemies in Damash, Guilan Province

Articles in Press

Document Type : Research Paper

Authors

1 Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization(AREEO), Rasht, Iran

2 Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Guilan, Rasht, Iran

3 Department of Environment, Guilan Province, Rasht, Iran

4 Natural Resources and Watershed Management Organization, Tehran, Iran

Abstract

The beetle Lilioceris faldermanni (Guérin-Méneville,1829) (Coleoptera: Chrysomelidae) is a major pest affecting the Chehel Cheragh Lily in the Damash region of Gilan Province. Both its larvae and adults damage the plant’s aerial parts.From March 2018 to October 2021, the population dynamics of this pest were studied in Damash. After selecting an appropriate number of samples in each area, Population fluctuations were analyzed based on the average number of larvae and adults per sampling. The study revealed that overwintering adults emerge in late March, peaking in density within 45 days. Egg-laying begins in mid-April, and the first-generation adults appear between late June and early July, with a significant increase in population density.Three generations of this pest were recorded in the Damash region. The results of the correlation analysis between the different developmental stages of the pest and the average daily temperature showed a significant correlation at the 0.05 level between the population changes of adult insects, immature stages, and eggs. The spatial distribution pattern of this pest for all developmental stages over the four years in the Damash region was found to be aggregated. In this study, four species of ladybugs from the Coccinellidae family were collected and reported for the egg and larval stages, as well as one genus of parasitic fly from the Tachinidae family.

Keywords

Journal of Applied Research in Plant Protection

Articles in Press, Accepted Manuscript
Available Online from 31 August 2025

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History

  • Receive Date: 26 February 2025
  • Revise Date: 22 May 2025
  • Accept Date: 07 June 2025

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