Evaluation of the Insecticidal Activities of Three Eucalyptus Species Cultivated in Iran, Against Hyphantria Cunea Drury (Lepidoptera: Arctiidae)

Abstract

In the current study, the larvicidal activity of leaf essential oils from three eucalyptus species (Eucalyptus largiflorens Meull, Eucalyptus oleosa Meull, and Eucalyptus spathulata Hook) against American white moth, Hyphantria cunea Drury 1773 (Lepidoptera: Arctiidae), was investigated. Mortality was recorded daily for three days after treatment. Leaf disc bioassays revealed that all three oils had strong insecticidal activity on the experimental insects insofar as 50% lethal concentrations (LC 50 ) for E. oleosa, E. spathulata, and E. largiflorens at 24 h exposure time were 0.36, 0.61, and 1.24%, respectively. The time needed to kill 50% (LT 50 ) values were calculated as 9.09 h with E. largiflorens, 11.03 h with E. oleosa, and 13.03 h with E. spathulata at the highest concentrations (2.5% for E. largiflorens, 2% for E. oleosa, and 2.5% for E. spathulata). Based on probit analysis, an increase in the susceptibility of the insect was associated with an increase in the different concentrations of all oils and the increase in the time of exposure. The results of this study show that leaf essential oils of E. largiflorens, E. oleosa, and E. spathulata might be considered as a potent source for the production of fine natural larvicides.

Insecticidal activity of young and mature leaves essential oil from Eucalyptus globulus Labill. against Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae)

“…In that sense, for biological purposes, it could be more informative to 1: α-Pinene, 2: β-pinene, 3: β-myrcene, 4: limonene, 5: α-terpineol, 6: 1,8-cineole, 7: globulol. study the entire oil rather than some of its components because the concept of synergism seems to be important (Regnault-Roger et al, 2012;Ebadollahi et al, 2013).…”

Effect of soil type on pyrethrum seed germination

“…The development of alternative methods that are not chemical applications is necessary in pest management for the sake of human health and for the safety of the environment (Jafarbeigi et al 2012). The demand for natural insecticides (Ertürk et al 2004;Ebadollahi 2013) as well as the demand for pyrethrum as a botanical insecticide is rising rapidly in the world market (Andreev 2008;Li 2011). Its powder is prepared from dried flower heads.…”

Chemical Composition and Insecticidal Activities of Essential Oils of Myrtaceae against Tribolium castaneum (Coleoptera: Tenebrionidae)

“…α-Pinene has been known to show fumigant toxicity against Sitophilus oryzae, T. castaneum, and Triboleum confusum [62][63]. The effectiveness of 1,8-cineole has been documented against many storedproduct insects [22]. This implies that the higher the 1,8-cineole content, the lower the LC 50 values and vice versa.…”

“…Studies have also reported insecticidal activities of different species of Myrtaceae against T. castaneum [16][17][18]. α and β-pinene, terpinen-4-ol, 1,8-cineole, and methyl eugenol have been reported as major components in Myrtaceae essential oils, which have been known for their toxicities against pestiferous insects [19][20][21][22][23].…”