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THE RELATIONSHIP BETWEEN MIGRATION DYNAMICS OF APHID VECTORS AND EPIDEMIC OF PEPPER VIRUS DISEASES THE EFFECTS OF IMMIGRATED POPULATION AND CLIMATIC FACTORS ON FIELD POPULATION DYNAMICS OF RICE CASEWORM Effect of the change of rice planting system on the formation of outbreak population of brown planthopper, Nilaparvata lugens Population dynamics of wheat aphids in different agricultural landscapes The plant biodiversity and its conservation in the submersion district and the immigration district of the Three-Gorges, China