pistachio in Iran, and is generally controlled by insecticides belonging to various classes
especially, phosalone. The toxicity of phosalone in nine populations of the pest was assayed
using the residual contact vial and insect-dip methods. The bioassay results showed
significant discrepancy in susceptibility to phosalone among the populations. Resistance
ratio of the populations to the susceptible population ranged from 3.3 to 11.3. The synergistic …