| Apple is one of the fruits that cultivated widely, consumed in high quantity and has high economic effect in the world. Using a great quantity of chemical pesticides to control diseases and pests resulted in high pesticide residue, low internal quality of the products. This threatened the security of mankind. Free-pollutant culture has become the inexorable trend. The research of the dynamics of insect community in apple orchard was the basement of ecological control and management of apple pest. In this article the dynamics of insect community in free-pollutant culture apple orchard were investigated from 1999 to 2002. The orchard was in Fugangshanzhuang of Houjiazhuang country, Neiqiu County which located in the southern of Taihang Mountain. The results were as followed:1 Twenty species of insects that belonged to 7 orders and 12 families were found in free-pollutant culture apple orchard. The varieties of above-ground were Tetranychus viennensis Zacher, Lithocolletis ringoniella Mats. , Aphis citricola van der Goot, Drosicha corpulenta (Kuwana) and Choristoneura longicellana Walsingham. Among these species Tetranychus viennensis Zacher, Lithocolletis ringoniella Mats, and Aphis citricola van der Goot were the superiority species. Other species such as Chihuo zao Yang Drosicha corpulenta (Kuwana) et al. appeared sporadically. The population quantity of Tetranychus viennensis Zacher made up the absolute predominance from the middle ten days of March to the middle ten days of April. The population quantity of Lithocolletis ringoniella Mats, made up the absolute predominance from the middle ten days of July to the beginning of August and the population quantity of Aphis citricola van der Goot made up the absolute predominance from the last ten days of April to the beginning of June. Chrysopa septempunctata Wesmel and ladybug were pest enemies. The varieties of underground insect were Grub, Maladera orientalis Motschulsky, Gryllotalpa africana Pallisot et Beauvois, and Grub was the predominant species.2 The spatial pattern of the over-wintering form of Tetranychus viennensis Zacherwas aggregation distribution. They concentrated in trunk and first layer limbs. The quantity in these two parts made up 67.85 percent of the total quantity of Tetranychus viennensis Zacher in apple tree, but there were little amount of Tetranychus viennensis Zacher in center trunk and the second layer limbs. Tetranychus viennensis Zacher in trunk were concentrated in old crack barks and girdling cracks. Tetranychus viennensis Zacher in first and second limbs were concentrated in the boundary of axial shoot and stem, axial shoot and center trunk, girdling cracks, pruning wound and aerial roots et al. These Tetranychus viennensis Zacher were distributed mainly in the shady side of the branch. Culture condition of orchard affected the distribution of over-wintering form of Tetranychus viennensis Zacher significantly. The over-wintering form population of Hawthorn spider mite in free-pollutant culture apple orchard was ground orchard>southern exposure orchard>northern exposure orchard. There had significant level at 0.01 among these three orchards. Culture condition affected the distribution of Tetranychus viennensis Zacher also. The quantity of Tetranychus viennensis Zacher in free-pollutant culture apple orchard was less than that of ordinary orchard on the same culture condition significantly.3 Tetranychus viennensis Zacher had two occurrence peaks in early growth period of apple: the first was from the end of March to the beginning of April and this was the result of the breeding of the over-wintering form of Tetranychus viennensis Zacher. The second was from the end of June to the beginning of July. The quantity of Tetranychus viennensis Zacher in the southern exposure orchard was more than that of the northern exposure orchard and the ground orchard significantly, and it had no difference with the ordinary orchard. After the second occurrence peak, Tetranychus viennensis Zacher changed into over-wintering form...
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