Phytovirus vectors Frankliniella schultzei (Trybom, 1920) (Thysanoptera: Thripidae) and Myzus
persicae (Sulzer, 1776) (Hemiptera: Aphididae) feed on crops of great economic importance brings large economic losses
worldwide to cultivated species such as tomato and cotton. F. schultzei transmits Tospovirus, Groundnut ring spot virus
(GRSV) and Tomato spotted wilt virus (TSWV) to tomato plants and M. persicae transmits Potato virus Y (PVY), Tomato
yellow top virus (ToYTV) and Tomato bottom yellow leaf virus (TBYLV) to tomato crops. Chemical constituents of
essential oils have been increasingly studied because they present a wide range of biological activities. The aim of this
work was to characterize Cymbopogon citratus essential oil and evaluate its potential insecticide activity against F.
schultzei and M. persicae. The essential oil was obtained from fresh leaves by hydrodistillation using a Clevenger
apparatus. Its yield (1.04%) was determined relative to the dry mass of the plant. Qualitative analysis was performed by
gas chromatography coupled to mass spectrometry and chemical constituent content was determined by gas
chromatography with a flame ionization detector. Nine compounds were identified, with geranial (49.98%) and neral
(37.78%) being the major components. The insects were sprayed with C. citratus essential oil at different concentrations
using a Potter tower. The LC50 values for M. persicae and F. schultzei were 0.28% and 1.49%, respectively. Essential oil
from C. citratus is a promising natural alternative for developing pesticides to manage M. persicae
Phytovirus vectors Frankliniella schultzei (Trybom, 1920) (Thysanoptera: Thripidae) and Myzuspersicae (Sulzer, 1776) (Hemiptera: Aphididae) feed on crops of great economic importance brings large economic lossesworldwide to cultivated species such as tomato and cotton. F. schultzei transmits Tospovirus, Groundnut ring spot virus(GRSV) and Tomato spotted wilt virus (TSWV) to tomato plants and M. persicae transmits Potato virus Y (PVY), Tomatoyellow top virus (ToYTV) and Tomato bottom yellow leaf virus (TBYLV) to tomato crops. Chemical constituents ofessential oils have been increasingly studied because they present a wide range of biological activities. The aim of thiswork was to characterize Cymbopogon citratus essential oil and evaluate its potential insecticide activity against F.schultzei and M. persicae. The essential oil was obtained from fresh leaves by hydrodistillation using a Clevengerapparatus. Its yield (1.04%) was determined relative to the dry mass of the plant. Qualitative analysis was performed bygas chromatography coupled to mass spectrometry and chemical constituent content was determined by gaschromatography with a flame ionization detector. Nine compounds were identified, with geranial (49.98%) and neral(37.78%) being the major components. The insects were sprayed with C. citratus essential oil at different concentrationsusing a Potter tower. The LC50 values for M. persicae and F. schultzei were 0.28% and 1.49%, respectively. Essential oilfrom C. citratus is a promising natural alternative for developing pesticides to manage M. persicae
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