EFFICIENCY OF Bacillus thuringiensis AND Bacillus larvae ON Ceratitis capitata (WIED) LARVAE ( DIPTERA : TEPHRITIDAE) IN NORTH SINAI GOVERNORATE .

Bacillus thuringiensis and Bacillus larvae were tested as biocontrol agents  against Ceratitis capitata larvae, Results showed that when  larvae of C . capitata fed after five  days from egg hatching  at any of the tested concentrations (1.25,2.5,5,10) CFU/ml, the highest percentage of mortality occurred with the first three days following application, then the larval mortality  started to decrease. The LC50 of the most potent isolates (B. thuringiensis) was 3.5, this was followed by B. larvae 8.)