Laboratory study of biological interraction between entomopathogenic fungi Beauveria bassiana (Bals.) Vuill. and some pesticides used in integrated plant protection systems.

This paper aimed to assess the effect of pesticides that are used to protect crops of peas, and sunflower on biological parameters (conidial germination, vegetative growth and sporulation) of an entomopathogenic fungi Beauveria bassiana -active ingredient of fungal bio-insecticides. The formulations with lambda-cyhalotrin, deltamethrin, imazamox, pendimetalin, tiuram and tribenuron-methyl were tested at three different concentrations (mean concentration-MC, half and twice the MC). The results indicated that formulations with pendimethalin and deltamethrin are not compatible with B. bassiana and it caused a strong or complete inhibition in its development. Compatible products with B.bassiana (strain BbS1.07) were those with tribenuron-methyl (1/1 MC), tiuram (½ and 1/1 MC) and imazamox (½ MC). These formulations can be used simultaneously with this entomopathogenic fungus in integrated pest management in crops of peas, barley and sunflower.