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Objective This study was aimed to assess the enzymatic activity and pathogenicity potential of  Beauveria bassiana  and  Metarhizium anisopliae  against whiteflies in Ethiopia. Results The data showed that  Beauveria bassiana  AAUMB-29, AAUMFB-77, and AAUEB-59 generated the highest chitinase (EI = 3.41), lipase (EI = 4.45), and protease activities (EI = 5.44) respectively. The pathogenicity study of isolates on whitefly nymphs and adults indicated significant variation (P &lt; 0.05) with mortality ranging from 71.67 to 98.33% and 60 to 100% against  Bemisia tabaci  and  Trialeurodes vaporariorum  nymphs respectively. The mortality of adults was between 58 and 94.27% against  B. tabaci  and 59.03 to 95.37% against  T.vaporariorum.  The result also showed that AAUMB-29, AAUMFB-77, and AAUDM-43 were the most virulent with LC 50  values of 2.7 × 10 4 , 5.3 × 10 4 , and 5.4 × 10 4  conidia/ml against nymphs of  B. tabaci , and with LC 50  values 6.8 × 10 4 , 8.2 × 10 4 , and 7.2 × 10 4  conidia/ml against nymphs of  T. vaporariorum , respectively. The  B. bassiana  AAUMB-29,  B. bassiana  AAUMFB-77, and  M. anisopliae  AAUDM-43 induced the highest whitefly mortality than other isolates. These isolates can be recommended for further tests under field conditions to fully realize their potential as effective biocontrol agents against whitefly pests in tomato.

bmc research notes

Extracellular enzyme activity of entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae and their pathogenicity potential as a bio-control agent against whitefly pests, Bemisia tabaci and Trialeurodes vaporariorum (Hemiptera: Aleyrodidae)