none Enter The parasitic functional response of Lysiphlebus testaceipes (Cresson) to Aphis craccivora (Koch) was observed at 25 [degree]C, RH 40% and 16 L: 18 D. Results showed that density of host affected parasitism of L. testaceipes significantly, and the functional response can be expressed as Na = 1. 118 No/ (1 +0. 0184No) by the Holling II equation. The numbers of host parasitized by single female L. testaceipes in 24 h was 60. 60. The time spent in one host parasitized by single L. testaceipes was 0. 396 h. At 5 different temperature gradient, the parasitic functional response of L. testaceipes to A. craccivora fitted Holling type II without exception, but the functional response parameter at the varity of temperature was of different significantly. In addition, the density of L. testaceipes affected the parasitism to some extent and the interference fitted Hassell - Varley model, which could be well simulated as a = 0. 0621 P-0.3062, the equation indicated that the discovery domain of female L. testaceipes decresed with increasing density of itself. The interference between female parasite weaken the parasitic function. March 15 2012 noneEmail20150313 (liuaiping806@sohu.com)