2026/03/18 by Fatma zohra Tchaker, Zahr-eddine Djazouli, İsmail Karaca · 1 voice
Agricultural and Biological Sciences · #Insect Pest Control Strategies #Insect-Plant Interactions and Control #Allelopathy and phytotoxic interactions
paper · doi:10.17221/187/2024-pps
openalex publication_date 2026/03/18 · openalex created_date 2026/03/20 · openalex updated_date 2026/06/24
<br>Methods used to control insect pests have been mainly chemical. Given the irritations associated with the use of pesticides, a search for alternatives is required, particularly through the use of plant extracts. The present study focused on comparing the insecticidal power of the aqueous extracts of the whole plant <i>Dittrichia viscosa </i>(commonly known as false yellowhead), the aqueous extract ratio of <i>D. viscosa</i>, and the bio-adjuvant <i>Silene fuscata</i> (1 : 1), as well as the synthetic pesticides Thiamethoxam/Lambda-cyhalothrin. Abundance, fecundity, demographic parameters, and biochemical parameter<i>s</i> (lipid-glucidic biomarkers) of the winter phenotype of the black poplar leaf aphid <i>Chaitophorus leucomelas</i> were considered variables to assess the effectiveness of different approaches. The results show a strong effect of the aqueous extracts of <i>D.</i><i>viscosa</i> (A.E. Plant) on abundance, with pronounced insecticidal activity from the aqueous extract ratio (A.E. Ratio) (<i>P</i><0.05). The lipid and carbohydrate energy of sexuparae undergo significant changes depending on the products used, with a disturbing effect of the synthetic product compared to aqueous extracts (<i>P</i><0.05). Fecundity shows a remarkable disturbance under the action of the active ingredient compared to the extracts. The results confirm that the products applied cause a disturbance in the growth rate (<i>r<sub>m</sub></i>) and net reproductive rate (<i>R</i><sub>0</sub>) of sexuparae, with the chemical treatment having the strongest effect (<i>P</i><0.05). The full dose of the active ingredient causes remarkable disturbances in the multiplication rate (λ) and the mean generation time (<i>T</i>) of the sexuparae compared to the other applied molecules. Some stability is reported for the doubling time (<i>DT</i>) of treated females compared to the control ones.