جستجوی مقالات مرتبط با کلیدواژه « سمیت تنفسی » در نشریات گروه « زیست شناسی »

The flour beetle, Tribolium castaneum Herbst is one of the most important pests damaging cereals specially wheat and lowering the quality and quantity of the production directly and indirectly each year. This study had done in order to investigate the toxicity effect of two essential oils of Cichorium intybus and Utrica dioica in different treatment duration (24, 48 and 72 hours) on mortality of larval and adult stages of T. castaneum. The experiments were done at entomology laboratory of Islamic Azad University of Tabriz during 2018, based on a complete randomized design in 25 ± 1°C and 60 ± 5 % of humidity. Investigation had done in 4 replications and 25 insects per unit. Based on LC50 value from probit analysis of mortality percent in T. confusum 72 hour after treatment, least LC50 belong to larvae and application of C. intybus essential oil. In response to essential oil of both medicinal plant, least LC50 value observed in larval stage. In this investigation increasing treatment time, decreased LC50 value. Results of line-effects showed that sensitivity of two stage to C. intybus is the same. But adult insect of T. confusum in lower concentration were more sensitive V. dioica essential oil. Also in higher concentrations there were less difference between these two stage to V. dioica essential oil that shows higher concentrations of V. dioica cause more effective death in adults than larval stage.