Collect, Isolate and Select Some Strain Mycopathogens on Scale Insect in Centre Highland

Abstract

360 specimens of scale insect (Pseudococcussp) infected with mycopathogens in three Central highland provinces of Dak Lak, Dak Nong, and GiaLai were collected. The fugal isolation has identified a total of 11 fungal strains, ofwhich 4 strains (MR1 to MR4) belonging to Metarhizium anisopliae Sorokin and 7 strains (BR1 to BR7) belonging to Beauveria bassiana Vuill. The virulence test by evaluating extra-cellular enzyme activity indicated that the diffusion ring of the strain BR5 on chitin-T substrate was 15.33 mm and on chitin-C 16.00mm. The figures for the strain BR4 was 13.33 mm, and 13.83mm, respectively. Similarly. The strains MR1 and MR3 on these substrates produced a diffusion ring of 11.00 mm, and 15.33 mm and 11.33 mm and 14.33, respectively. These are 4 promising strains that could be utilized for mass production and control scale insect on coffee