Insecticidal activity of Callistemon speciosus essential oil on Anticarsia gemmatalis and Spodoptera frugiperda

Insecticidal activity of lemongrass essential oil and its major compounds on velvet caterpillar

“…Means followed by the same letter, lowercase within the treatment, and uppercase within the concentration, do not differ statistically by Fisher's LSD test at 5 % probability error (p = 0.05). Thus, at higher concentrations (0.7 % and 0.9 % v/v), both the essential oil and the mixture of citral and myrcene were effective in controlling A. gemmatalis within 24 h. A similar behavior was observed by Silvestre et al (2021) when evaluating the insecticidal activity of Callistemon speciosus essential oil (major compound 1,8-cineole) on this pest insect. Plata-Rueda et al (2020 reported a quick action of citral (neral and geranial) and their derivatives (neryl/geranyl acetate) on Ulomoides dermestoides and A. gemmatalis.…”

“…SCALERANDI et al, 2018) Andrade-Ochoa et al (2018),. assessing the relationships of biological activity of several terpenes alone and in binary mixtures, reported that binary mixtures of myrcene with transanethole, limonene, carvacrol, and thymol have had a synergistic insecticidal effect against pupae and larvae of Culex quinquefasciatus (Diptera, Culicidae),Khorram et al (2011) observed that binary mixtures of myrcene with α-pinene, β-pinene, camphene, and γ-terpinene had an additive effect since there was no increase of the insecticidal activity relative to the activity of the individual compounds.As observed by Regnault-Roger (2013),Jankowska et al (2018), andSilvestre et al (2021), terpenes and essential oils act through a neurotoxic effect. This effect has two main mechanisms, the first is by disrupting neuron membranes (and not only nerve cell membranes), causing ionic imbalances and malfunctioning of ion channels and other membrane proteins.…”

“…As commented by Silvestre et al (2021), the toxic mechanism of novaluron occurs through inhibition of chitin synthesis. This active compound must be absorbed and transported to the target tissues for its toxic effect to occur, a slower process than the one observed for terpenes, which is believed to act by a neurotoxic mechanism, which is faster (ENAN, 2001;REGNAULT-ROGER, 2013).…”

Status and management strategies of major insect pests and fungal diseases of maize in Africa: A review

“…Essential oils from Cymbopogon citratus, Cymbopogon winterianus, and Lippia origanoides caused mortality in fall armyworm (FAW) within 24 hours (Sombra et al, 2020). Essential oil from Crocus speciosus exposed to FAW larvae resulted in mortality rates of 33.2% at 0.8% v/v, 86.6% at 1.0% v/v, and 100% at 1.5% v/v after 72 hours (Silvestre et al, 2021). Several studies have demonstrated the harmful effects of essential oils from Eucalyptus citriodora and Syzygium aromaticum on third-instar larvae of FAW (Cruz et al, 2017), and eugenol, Citrus aurantium, S. aromaticum, and Citrus limon have shown antifeedant activity against FAW (Da Camara et al, 2022).…”