Fumigant toxicity of Eucalyptus intertexta, Eucalyptus sargentii and Eucalyptus camaldulensis against stored‐product beetles

Abstract

Three essential oils extracted from the species of the family Myrtaceae found in Kashan (centre regions of Iran) were shown to have potent fumigant toxicity against three major stored-product insects: Callosobruchus maculatus (Fab.), Sitophilus oryzae (L.) and Tribolium castaneum (Herbst). These were the essential oils from Eucalyptus intertexta R.T. Baker, Eucalyptus sargentii Maiden and Eucalyptus camaldulensis Dehnh. The mortality of 1-to 7-day-old adults of the insect pests increased with concentration from 37 to 926 ll/l air and with exposure time from 3 to 24 h. The LC 50 values to the selected essential oils were between 2.55 and 3.97 ll/l air for C. maculatus, 6.93 and 12.91 ll/l for S. oryzae and 11.59 and 33.50 ll/l air for T. castaneum. Fumigant effects of these essential oils were considered to warrant further research into their potential for commercial use.

ACTIVIDAD INSECTICIDA DE ACEITES ESENCIALES DE DOS ESPECIES DE Eucalyptus SOBRE Rhyzopertha dominica Y SU EFECTO EN ENZIMAS DIGESTIVAS DE PROGENIES

“…In contrast to E. globulus, emergence of R. dominica progeny in wheat exposed to E. camaldulensis oil, with all volumes evaulated and at all exposure times, was not significantly affected (P < 0.05) ( Table 2). E. camaldulensis essential oil has been reported as an effective agent for reducing the population of insects in stored grains (Naseem & Khan, 2011;Negahban & Moharramipour, 2007); however, in this study it was not effective in reducing the emergence of R. dominica progenies.…”

“…This analysis found that the highest insect mortality that E. camaldulensis caused was reached at 48 h with no significant change observed over longer exposure times (P < 0.05) ( Table 1). E. camaldulensis oil has been reported as one of the causes of increased mortality in insects that damage stored grain (Negahban & Moharramipour, 2007), although in this study R. dominica was more resistant to the toxic effect of this oil.…”

“…con todos los volúmenes evaluados y en todos los tiempos de exposición, no fue afectada significativamente (P < 0.05) (Cuadro 2). El aceite esencial de E. camaldulensis ha sido reportado como un agente efectivo para reducir la población de insectos de granos almacenados (Naseem & Khan, 2011;Negahban & Moharramipour, 2007); sin embargo, en el presente estudio no fue eficaz para reducir la emergencia de progenies de R. dominica.…”

Can a Garden Cress (<i>Lepidium sativum</i>: Cruciferae) Seeds be a Poisonous Bait for the Larvae of <i>Trogoderma granarium</i> Everts?

“…Reference [55] indicated that the traditional use of L. sativum seed powder of applying and placing it on the skin to repel mosquitoes, domestic flies, ticks, and pest mites was effective due to its high repellency and exterminating activity.…”

Antifungal and insecticidal activities of Raphanus sativus mediated AgNPs against mango leafhopper, Amritodus brevistylus and its associated fungus, Aspergillus niger

“…Adults with less than 2 weeks old (Negahban & Moharramipour, 2007) were used for the experiments. Effects of the silver nanoparticles on adult mango leafhoppers were determined by contact toxicity assay at five different doses of 5 ppm, 10 ppm, 20 ppm, 50 ppm and 100 ppm.…”