Study on Colonization and Population Dynamic of Colorado Potato Beetle in the Field

【Objective】 To further clarify the progress of colonization and population dynamic of Colorado potato beetles in the field, and reduce the occurrence and population spread to ensure the development and safety of potato production in Xinjiang. 【Method】 The dynamics of Colorado potato beetle population in Xishan Farm's and Sanping Farm's fields during potato growing period was investigated systematically and the pest population number was analyzed and compared on host plants in different spatial locations in the field, and the colonization time and migration process were determined by analyzing and comparing the population number. 【Result】 The colonization of Colorado potato beetles in Xishan Farm and Sanping Farm was: After the overwintered Colorado potato beetles were unearthed from the host crop field, they first migrated to the edge of the host field and then gradually spread to the center of the field until it covered the entire field; there was negatively relationship between the number of Colorado potato beetles and the colonization time. The earlier the colonization time, the larger the population of Colorado potato beetles. The population of Colorado potato beetles had a certain relationship with the colonization distance. In the early stage of colonization, the Colorado potato beetles and colonization distance were negatively correlated, the greater the colonization distance, the smaller the population of Colorado potato beetles; the correlation between the two was gradually reduced, and there was a positive correlation between them in the later period. 【Conclusion】 In the field, the schedule of overwintered Colorado potato beetles colonization was related to the distance of the overwintering site. The edge of the field near the overwintering point was usually the earliest colony of Colorado potato beetles. The early monitoring of overwintering Colorado potato beetle adults in the marginal area can effectively define the colonization and migration process of Colorado potato beetle population in the field.