The life table of the natural population of the vegetable leafminer, Liriomyza sativae Blanchard was constructed based on the data of systemic survey on the untreated plot of bean, Phaselus vulgaris . The suppression effect of parasites on the natural population of the leafminer was analyzed by means of exclusive index of population control (EIPC). The results indicated that the trend index of population dynamics of the leafminer (I value) was 5.61. The factor of "parasites" was the important facto...