| Traditional Chinese medicine industry has paid more attention to green Chinese herbal medicine, and it's production and bases building have been the main contents of modern Chinese herbal medicine. Western area is the traditional base of China, chemical pesticide control was proved to be effective in controlling pests, but it also causes pesticide pollution, and they threats people's health. In order to reduce pollution, ecology control must be used in the production of Chinese herbal medicine, according to the criteria of Green Chinese medicine. Swertia divivi Franch is also called yudan cao, qingyu cao, Qingyedan, shuilingzhi, shuihuanglian, xiaosifang, fehengcao, and so on. It is an important Chinese herbal medicine in folk prescription. In recent years, Swerfia dividi Franch culture area is becoming to been expanded year by year in western rejoins of Hunan province, there is a bright future in developing Swertia dividi Franch production. However, plant diseases and insect pests generally happen every year, are very harmful to Swertia dividi Franch, and influence the development of the plant and blade seriously, even withered to death, and threat to the Swertia dividi Franch's production.The domestic and international scholars have already studied on Swertia dividi Franch until now, botany , biology, ecology , chemical contents and clinical drug effect,etc. And researchers have studied on many aspects of aphid on field crop, such as morphology , anatomy , biology , taxonomy , ecology, etc. at the same time studied on aphid on some medical plants ( such as the north root of straight ladybell, Matrimony vine, Chinese sumac,etc.), economic crops (such as tea , tobacco , soybean , peanut ) , the flowers and potted landscapes. But the survey of pests on Swertia dividi Franch, the species of aphid, occure law , and the relationship between Swertia dividi Franch and aphid,etc. have not been reported on materials yet at present. So the research of thesis has practical value and important meaning to utilize to develop to Swertia dividi Franch production and exploit.Followings are the main studies in the paper:1. Investigation of pests on Swertia divivi Franch in western rejoins of Hunan. The result shows, there are 2 kinds of Mollusks, 1 kind of acarina belongs to Archnida, and 9pests from 3 Ordos and 6 Familia. And 4 species of aphids (Homoptera) have the largest quantity, which account for 44%.2. The discrimination of aphid species and the distinguish of morphological characters. Aphids which harm Swertia divivi Franch include 4 series: Myzus persicae (Sulzer, 1776), Aulacorthum solani (kaltenbach, 1843), Aphis glycines Matsumura (1917) and Aphis gossypii Glover(1877). Among them, Aulacorthum solani kaltenbach is the dominant species.3.The researches on host plants of Aulacorthum solani kaltenbach and studies on the connection between aphid occurence and temperature. In this experiment, Aulacorthum solani kaltenbach has been found the new scope of distribution and some concrete host plants. And studies on the biological zero, sum of effective temperature, optimum, minimum and maximum temperature, and temperature's influence of aphids' survival rate.4.The studies on aphids" harm and aphids' consumption under different density. The result shows: the density is over 20 aphids, and the consumptions take on remarkable difference.5. According to different quantities of aphids' harm on Swertia dividi Franch's main chemical compositions are different. The result shows: the density of aphids on Swertia dividi Franch is the main factor which influence the important chemical composition-swertianolin. The density over 20 aphids, the harm levels to Swertia dividi Franch main chemical composition danger are different.6.The research of the influence of quality for pesticide. The result shows: though pesticide has fine prevention and cure result to aphid, has influence quality, and agriculture chemicals residue to been detected in it.This experiment studies emphasizes on the effect of aphids on Swertia dividi Franc...
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