University of Guilan Plant Pest Research 2322-2409 4 2 2014 08 23 Evaluation the toxicity of Neemarin® against larvae of the Mediterranean flour moth, Ephestia kuehniella Zell. (Lep.: Pyralidae) and Indian meal moth, Plodia interpunctella Hübner (Lep.: Pyralidae) Evaluation the toxicity of Neemarin® against larvae of the Mediterranean flour moth, Ephestia kuehniella Zell. (Lep.: Pyralidae) and Indian meal moth, Plodia interpunctella Hübner (Lep.: Pyralidae) 11 17 518 FA N. Moazeni H. Izadi J. Khajeali Journal Article 2015 06 26 Concerns over health and environmental problems associated with using synthetic insecticides in storages, have led to an intensification of efforts to find safe, effective and viable alternatives. In this research, susceptibility of larvae of<em>Ephestia kuehniella</em> and <em>Plodia interpunctella</em> was investigated to neemarin. Probit analysis of concentration-mortality data was conducted to estimate the LC₅₀. Our results showed that mortality of the both pests increased as concentration of the insecticide increased. Effectiveness of the insecticide against both pests was proportional to pesticide concentration and time of treatment. It was more effective in 14 than 7 days after treatments. The exposure time was comparatively increased neemarin efficacy against <em>E. kuehniella</em> more than <em>P. interpunctella</em>. In conclusion, susceptibility of both pests to neemarin was the same and relatively low. LC₅₀s of <em>E. kuehniella </em>larvae after 7 and 14 days were 4252 and 2994 ppm, respectively and for <em>P. interpunctella</em> larvae were 4029 and 3581 ppm, respectively. Concerns over health and environmental problems associated with using synthetic insecticides in storages, have led to an intensification of efforts to find safe, effective and viable alternatives. In this research, susceptibility of larvae of<em>Ephestia kuehniella</em> and <em>Plodia interpunctella</em> was investigated to neemarin. Probit analysis of concentration-mortality data was conducted to estimate the LC₅₀. Our results showed that mortality of the both pests increased as concentration of the insecticide increased. Effectiveness of the insecticide against both pests was proportional to pesticide concentration and time of treatment. It was more effective in 14 than 7 days after treatments. The exposure time was comparatively increased neemarin efficacy against <em>E. kuehniella</em> more than <em>P. interpunctella</em>. In conclusion, susceptibility of both pests to neemarin was the same and relatively low. LC₅₀s of <em>E. kuehniella </em>larvae after 7 and 14 days were 4252 and 2994 ppm, respectively and for <em>P. interpunctella</em> larvae were 4029 and 3581 ppm, respectively. https://iprj.guilan.ac.ir/article_518_88207476c687675d795ef2e3df6c6447.pdf