It was determined the effect of Lecanicillium lecanii (Zimm) and Beauveria bassiana (Bals.) On the phytophagous mite Panonychus citri. For this, the breeding of P. citri was carried out, and it was propagated to both fungi in potato sucrose agar. Five treatments were performed with three replicates each; each treatment had 30 specimens between nymphs and adults of P. citri and the technique of inoculation was by spray. At the first treatment, 0.1% tween 80 was inoculated; at the second and third treatments, L. lecanii were applied at concentrations of 106 and 107 conidia / mL respectively; and at the fourth and fifth treatments, B. bassiana was applied at 106 and 107 conidia / mL respectively, and the specimens were incubated at room temperature until symptoms appeared to be slow moving, tegument darkening, dehydration and death. Dead mites were placed in a humid chamber until the appear...

The effect of the 1200 and 1800 ppm concentrations of the insecticide metamidofos on the germination, growth and entomopathogenic activity of Beauveria bassiana was determined. The effect on B. bassiana germination was determined by placing 2mL of each insecticide concentration in small flasks, adding 2mL of the conidia suspension, to obtain a final concentration of 1x105 conidia/mL It was incubated at temperature of 25 ° C for 24 hours, then counted germinated conidia. For growth, the insecticide was incorporated into potato dextrose agar, and served in Petri dishes, as well as a control plate containing only culture medium, by puncturing in the central part of each Petri dish according to its corresponding concentration of each insecticide and the control, incubating at 25 ° C for 7 days. For the entomopathogenic activity S. frugiperda larvae were inoculated with the fungus grown in ...