Abstract In this survey, the air-borne tow-net traps were set up along the eastern, southern, and western coasts of Taiwan, even on the separate island, to collect the migrating BPH. Besides, meteorological information from Central Meteorological Bureau were applied, in accordance with the data of BPH collected at different localities, localiities, to analyze the migrattional tracks of this air-borne insect.
According to the results obtained in recent five years (1978-82), the long-distance migration of BPH in Taiwan area could induced into four patterns as follow：
1) The pattern of Spring-rain period during April to early-May, the BPH should emigrate from the philippines to Taiwan, assisted by the reversed air-flow of high pressure in pacific ocean.
2) The pattern of Mei-yu period during mid-May to early-June, the BPH could emigrate from Canton area to Taiwan, assiasted by the warm and humid air masses of low pressure in Canton.
3) The patterrn of typhoon period during July to September, the BPH could emigrate from Fu-chen area or the Pilippines to Taiwan, assisted by the circulation of typhoon which pass near the northcast or southwest of Taiwan, especiality.
4) The pattern of northeastern monsoon period during October to November, the BPH could emigrate from Taiwan to southeastward of Ma-Kung, assisted by the air-flow of the northeastern monsoon.
摘要
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