Method for propagating sulzer braconid flies

The invention discloses a method for propagating sulzer braconid flies. The method comprises the following steps: firstly, culturing a host plant of tobaccos, then propagating sulzers and afterwards propagating the sulzer braconid flies by the sulzers. By propagating the flies in batches, the multi-generation repeated propagation of the sulzer braconid flies is avoided, the generation quantity ofthe hyperparasite flies of the sulzer braconid flies is reduced, and the survival capability of the sulzer braconid flies in the field is enhanced. The propagation time and quantity of the sulzer braconid flies can be flexibly regulated and controlled according to the actual condition of the field, and different requirements on the sulzer braconid flies under different situations are met. The emergence rate of the stiff aphids of the sulzer braconid flies propagated by the invention is more than 90%, the male-female ratio is 0.8-1.0:1, and the utilization rate of the stiff aphids or the adultflies is more than 80%.