A whole-year census of the oriental fruit fly, Bactrocera dorsalis (Hendel), in a guava orchard was conducted to determine its annual population dynamics and diel activity pattern.

• 本试验在农业试验所一处番石榴园内调查东方果实蝇全年及单日之族群变动，并依据东方果实蝇在园内之族群变动推论此果实蝇迁移于果园内外的情形。