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- Title
Insecticidal activity of three plant extracts against adult Ips typograpgus L. under laboratory conditions.
- Authors
Takov, Danail; Barta, Marek; Nikolova, Milena; Doychev, Danail; Toshova, Teodora; Ostoich, Peter; Pilarska, Daniela
- Abstract
Three plant extracts - Origanum vulgare subsp. hirtum essential oil (EO), Monarda fistulosa EO, and a hexane fraction of Tanacetum cinerariifolium, wre evaluated and compared regarding their insecticide activity under laboratory conditions against the adults of the European spruce bark beetle, Ips typographus. The viability of I. typographus was affected with all tested plant extracts. The insecticidal effect varied among the extracts and concentrations used. Generally the mortality of beetles increased with the concentration of extracts and a significant positive correlation between the cumulative mortality and the extract concentration was confirmed by Pearson's correlation analysis (r = 0.910, p = 0.012 for O. vulgare subsp. hirtum, r = 0.937, p = 0.005 for T. cinerariifolium, r = 0.814, p = 0.048 for M. fistulosa). At the highest extract concentration (10%), the total cumulative mortalities reached 98% for O. vulgare subsp. hirtum and T. cinerariifolium extracts at the end of the bioassay (four days after treatment). The exposure of beetles to M. fistulosa extract decreased the survivability of I. typographus the most (15%) and was followed by T. cinerariifolium (38%) and O. vulgare subsp. hirtum (43%). Log-rank test showed no significant difference in the survival probabilities among the extracts. These are the first tests on the insecticidal effect of plant extracts from Tanacetum cineranifolium and Monarda fistulosa against the European spruce bark beetle Ips typographus.
- Subjects
PLANT extracts; OREGANO; PEARSON correlation (Statistics); IPS typographus; INSECTICIDES; NORWAY spruce; BARK beetles
- Publication
Baltic Journal of Coleopterology, 2023, Vol 23, Issue 2, p139
- ISSN
1407-8619
- Publication type
Article
- DOI
10.59893/bjc.23(2).001