Insecticidal activity of three plants extracts against Myzus persicae (Sulzer, 1776) and their phytochemical screening | Insekticidno delovanje izvlečkov treh rastlin na listno uš Myzus persicae (Sulzer, 1776) in njihova fitokemična analiza

English. To reduce the use of synthetic pesticides and their negative effects on the environment, leaves extracts of Artemisia herba-alba Asso, Eucalyptus camaldulensis Dehnh and Rosmarinus officinalis L. were obtained with petroleum ether, ethanol and distilled water as solvents. These extracts were evaluated under laboratory conditions for their insecticidal effect against 3 to 4 days-old Myzus persicae individuals (Homoptera: Aphididae) at 1, 2.5, 5, and 10 %. We made observations after 24 hours. Etheric extract of all plants was effective and caused mortalities (100 %, 53 % and 60 % respectively) at the highest concentration. However, ethanolic and aqueous extracts did not show any significant insecticidal effect. The phytochemical screening showed the richness of etheric extract in terpenes. The results obtained suggest that we can make bioinsecticides based on leaves etheric extracts from these plants for use in integrated pest management.

Slovenian. Z namenom zmanjševanja negativnih učinkov sintetičnih pesticidov na okolje so bili narejeni izvlečki listov s petroletrom, etanolom in distilirano vodo iz naslednjih treh rastlin Artemisia herba-alba Asso, Eucalyptus camaldulensis Dehnh. in Rosmarinus officinalis L.. Insekticidni učinki teh izvlečkov so bili ovrednoteni v laboratorijskih razmerah na 3 do 4 dni starih osebkih listnih uši vrste Myzus persicae (Sulzer, 1776), Homoptera: Aphididae) v 1, 2.5, 5, in 10 % razredčitvah. Opazovanja so bila opravljena 24 ur po uporabi. Učinkoviti so bili izvlečki s petroletrom vseh rastlin, ki so povzročili smrtnost (100 %, 53 % in 60 %) pri največjih koncentracijah. Etanolni in vodni ekstrakti niso imeli značilnega insekticidnega delovanja. Fitokemična analiza ekstraktov je pokazala veliko vsebnost terpenov v izvlečkih, dobljenih s petroletrom. Rezultati raziskave nakazujejo, da lahko naredimo bioinsekticide iz analiziranih rastlin na osnovi izvlečkov s petroletrom in jih uporabimo v integriranem varstvu rastlin.