Observations of the Effect of Two Isolated Nano Bacillus Thuringiensis on Tuta absolutaInfestation under Laboratory and Field Condition

摘要

ABSTRACT The effect of two nano isolated bacteria Bacillus thuringiensis were tested Under laboratory , semifield and field conditions. Data obtained record that the LC50 of T. absoluta 115 and 99 Ug/ml after treated with the nano bacteria Bacillus thuringiensis HD-703 and BtHD-95, respectively. Data recoded that, under semifield conditions, the LC50 obtained of Nano-Bt. HD 703 135 ug/ml and LC50 of T. absoluta treated with different concentrations of Bt. HD-95, recorded 109 Ug/ml. under field .