Research Information System
JOURNAL OF PLANT DISEASES AND PROTECTION, vol.133, pp.1-9, 2026 (SCI-Expanded, Scopus)
In response to increasing concerns over the ecological and
health-related consequences of synthetic pesticide use, this study investigates
the insecticidal efficacy of methanolic extracts derived from Carthamus
dentatus against the invasive agricultural pest Halyomorpha halys (Brown
Marmorated Stink Bug). Laboratory bioassays revealed a statistically
significant, dose- and time-dependent increase in adult mortality over a 10-day
exposure period. Notably, Flower Dose 25 (mg/L) consistently induced complete lethality
by Day 7 (100.00 ± 0.00%), while Leaf Dose 25 (mg/L) approached similar
efficacy by Day 9 (96.60 ± 1.99%). Intermediate mortality levels were recorded
for Flower Dose 50 (mg/L) and Leaf Dose 50 (mg/L), whereas the control group
exhibited negligible mortality (≤ 0.86 ± 1.33%), underscoring the specificity
of the treatment effect. To elucidate the phytochemical basis of this
bioactivity, high-performance liquid chromatography (HPLC) was employed to
characterise the phenolic composition of the extracts. Rutin was identified as
the predominant compound in floral tissues (56.4%), while o-coumaric acid was
most abundant in cauline leaves (38.9%). Additional phenolics, including
chlorogenic acid, naringin, chrysin, t-ferulic acid, quercetin, and rosmarinic
acid, were also detected. These compounds are known to contribute to plant
defence through mechanisms such as allelopathy, UV protection, and
anti-herbivory activity. Collectively, the findings highlight the potential of
C. dentatus methanolic extracts as a promising botanical alternative for the
sustainable management of H. halys populations.