author(s)
Iman Sharifian, Saeed Farahani, Masood Sanchooli, Fatemeh Sarani

abstract
Due to insect resistance to common fumigants such as Phostoxin, and some arguments about the genotoxicity of this pellet, production of alternative pellets with same application seems necessary. The aim of this work was comparison between insecticidal efficacy of Phostoxin and novel pellets based on Eucalyptol, botanical constituent, and Poly (vinyl alcohol) against Tribolium castaneum, Callosobruchus maculatus and Rhyzopertha dominica in 28±2 ºC, 24 and 48 h exposure time. Mortality percent in 24 h ± S.E. of 0.25 and 0.3 g Phostoxin pieces in 159 liter barrels against more tolerant (R. dominica) and more susceptible (T. castaneum) species were 33.3±4.4, 90±4.4, 45±2.8 and 100, respectively. Mortality percent in 24 h ± S.E. of 3 and 4 g novel pellets (with 3:5 dose) in 20 liter casks against more tolerant (T. castaneum) and more susceptible (C. maculatus) species were 0, 8.33±4.4, 35±2.8 and 48.33±4.4, respectively. In general, Phostoxin pellets were more effective than novel pellets, but results showed that Eucalyptol based pellets have potential toxicity to surrogate instead of obsolete Phostoxin pellets.