Diversity Of Predatory Natural Enemyinsects From Beijing-Tianjin-Hebei Region

The regulation utilization of predatory natural enemy insects in nature, the pest biological control by insect, is an effective way to ensure the protection of agricultural production and agricultural clean environment, also conducives to the realization of agricultural ecological balance, protecting biodiversity and achieve the lofty goal that the human is in harmony with a variety of lives. Based on the collection and identification of specimen, collection and analysis of related literature, the species and diversity of predatory natural enemy insects from beijing-tianjin-hebei region were investigated. Therefore, we must research on the species, diversity and dominant of natural enemy insects in the ecological environment firstly. The following results were obtained:1 By the specimen identification and collection of related literature, we obtained 1580 species of predatory natural enemy insects belonging to 632 genera in 101 families of 16 orders totally. Coleoptera, Hemiptera, Diptera, Hymenoptera and Odonata occupy advantages of predatory natural enemy insects diversity in Beijing-Tianjin-Hebei region, a total of 68 families, 548 genera and 1442 species, accounted for 67.33% of the area, 86.71% and 91.27% respectively.2 According to the 11 world zoogeographic regions system proposed by Holt, etc., the predatory natural enemy insects from Beijing-Tianjin-Hebei region highlights the component of Sino-Japanese region, and the number of species is 478, accounting for 30.25%, followed by the number of common species in the Sino-Japanese, Palaearctic and Oriental regions, accounting for 28.04%. The common species of Sino-Japanese and Palaearctic, Sino-Japanese and Oriental regions also occupy a high the proportion, accounting for 23.16% and 18.54%. This area has typical characteristics of the Sino-Japanese region. The species exchange with the Palaearctic and Oriental regions is very common, but retained a large number of endemic species.3 The main part of Beijing-Tianjin-Hebei region belongs to the North-China region according to the Chinese zoogeographic regions system proposed by Zhang Rongzu, etc, and is near to the Northeast, Central China and Inner Mongolia-Xingjiang region. The number of predatory natural enemy insects from Beijing-Tianjin-Hebei region only distributed in the North China region is the largest, 430 species, accounting for 27.25% of the total. On the cross regional distribution types, the highest is the Central China region, 781 species(49.43%), followed by the South China region, 639 species(40.44%). The Beijing-Tianjin- Hebei region contact with the Central China and South China region closely is probably due to the fact that the aera has no obvious geographical barrier in the south with the Central China region, and has geographic barriers in the north with the Northeast and Inner Mongolia-Xingjiang regions.