Use of Bacillus thuringensis (Berliner) and Insect Growth Regulator Nomolt to Control Schizaphis graminum (Rondani)

2006 Schizaphis graminum (Rondani) (0.53 / ) Bacillus thuringensis 1 410 1 510 1 610 2 610 / . / / 59.61 85.71% . 62.5 71.74% .Through the seaeon 2006 field trial for cereal aphid Schizaphis graminum (Rondani) control on wheat included Insect growth regulator NOMOLT at (0.5 cm3/L); Bacillus thuringensis (Berliner) at four concentration (1 104 , 1 105 , 1 106 , 2 106) and NOMOLT with Bacillus thuringensis (Berliner) and an uninfested control in exclusion cages. Significant grain yield through no. grains /head and grain weight/ head (g.) about (59.61 , 85.71%) were observed in the biochemical treatment (NOMOLT + 1 106) respectively , than the other treatments. AS well as significantly greater impact on aphid populations was evoked by the combined biochemical treatments where they were reduced by the range ( 62.5 -71 .74 % ) in the last week. the results thus suggest asynergistic effect between the chemical and biological components.