Hormesis for the intractable pests can be dreadful, but natural enemies of pests, it is a puissant strategy in optimizing their mass rearing. We report multigenerational stimulatory effects widely used insecticide, imidacloprid, on demographic traits an important egg parasitoid Trichogramma chilonis Ishii. The study investigated consequences sublethal (LC5), low lethal (LC30), and median (LC50)...

Hormesis is commonly defined as a beneficial or stimulatory effect caused by exposure to low doses of a chemical known to be toxic at high doses. Hormetic responses of food-supplied PCB 31 (2, 4', 5-Trichlorobiphenyl) was studied by using zebrafish (Danio rerio) growth as an end point. The results in general followed the hormesis hypothesis, PCB 31 at lower concentrations (0.042 μg/g and 0.084 ...

Phytotoxicity of Flumequine on the aquatic weed Lythrum salicaria L. was determined by two laboratory models: a single concentration test, by which the effects of 100 mg l-1 were evaluated after 10, 20, 30 days and a multiple concentration test, by which the effects of 5000-1000-500-100-50 micrograms l-1 were evaluated after 35-day exposure. 100 mg l-1 are highly toxic and significantly decreas...

Hormesis-like effects of immunity have been documented during tumor-growth experiments in mice, quantitatively large immune-reactions have inhibited while lesser quantities of the same specific immune-reactants have been stimulatory to the growth of implanted tumors. Likewise, carcinogenesis has been inhibited by a high quantities of immune reactants, but positively stimulated by lower levels o...

The occurrence of U-shaped dose-response relationships (often termed hormesis) has been documented in numerous biological, toxicological, and pharmacological investigations. Many of the endpoints studied are of considerable significance to public health (e.g. body weight, cholesterol levels, ethanol consumption, longevity, cancer incidence, etc). Despite the fact that U-shaped dose-responses ar...