Effectiveness of Beauveria bassiana Bioinsecticide against the Erannis jacobsoni diak

We tested the bioactivity bioinsecticide of Beauveria bassiana –G07 /Bassiana muscardin/ against the Jacobson's spanworm /Erannis jacobsoni Diak/, which is the most destructive pest in the forest. The experiment was conducted 5 variants (1.5×10⁶ spore/ml, 1.5×10⁷ spore/ml, 1.5×10⁸ spore/ml, 1.5×10⁹ spore/ml, control), 3 times on the larvaes in the laboratory in 14 days. For the field experiment, we used 4 variants (1.5×10¹³ spore/he, 2.5×10¹³ spore/he, 3.5×10¹³ spore/he, control), 3 times in 21 days. From the result of laboratory study the 1.5×10⁹ spore shows 91.9% bioactivity, and in the field study 3.5×10¹³ spore/he shows 80% bioactivity. Local strain B. bassiana –G07 and cultures of B. Bassiana, which were isolated from larvaes, died during the laboratory experiment, were detected and it was identified as species B. bassiana by PCR.