فاعلية عزلة محلية للفطر Beauveria bassiana (Bals.)‎ Vuil. في قتل حافرة أوراق البندورة الطماطم Tuta absoluta Meyrick

الملخص EN

A study was carried out in the laboratory to evaluate the potential of three different concentrations of Beauveria bassiana, isolated from local soils using "Galleria bait method", on larvae of the tomato leaf miner, Tuta absoluta (2nd and 3rd instars).

Mortality rate reached 100, 76 and 60 % for the concentrations 108, 106 and 104 spore/ml, respectively, 7 days after application, compared to 4% for the control treatment.

Average infestation rate of tomato plants after treating the larvae with the fungus was 57, 50 and 42% when 108, 106 and 104 spore/ml concentrations were used, respectively, compared to 95% for the control treatment.

Statistical analysis showed significant difference between the 1st and 2nd concentrations and the control treatment, whereas insignificant difference was obtained between concentration 104 spore/ml treatment and the control.

LC50 was calculated to be 3×105 spore/ml.

Keywords: Beauveria bassiana, Tuta absoluta, potential, entomopathogen.