Susceptibilidade de adultos de Musca domestica (Linnaeus, 1758) (Diptera, Muscidae) a organofosforado (Phosmet®), em condições de laboratório

RESUMO

Musca domestica (L., 1758) presents great medical, veterinary and public health importance. Aiming to avoid the accelerated development of insect resistance to insecticides, it is highly advisible to rotate insecticides. For this reason, the organophosphates continue to be a group of insecticides of importance, presenting low toxicity for animals and environment, associated to a low cost, mainly if applied in a rational rotation strategy. The current experiment aimed to evaluate the susceptibility of adults of M. domestica, using a composed 0,0-dimethyl-Sphthalimidomethyl phosphorodithioate. The tests were accomplished bytopical application of 1?l of the insecticide (diluted in organic solvent) on the prothoraxic of the insects. Five concentrations of the insecticide were evaluated, consisting of four repetitions, by the use of 20 flies per repetition. The LD50 found for the insecticide, after 24 and 48 hours of exposure were 0,00273 mol/l and 0,00234 mol/l, respectively. The tested insecticideshowed toxicity to adults of M. domestica, what signals the possible application of this insecticide in the control of this insect.