After systematic monitoring and field survey in orchard for three years from 2009 to 2011,it was found that Bactrocera dorsalis occurred for more than three generations each year on the north shore of the middle and lower reaches of Yangtze River,with overlapping generations; the activity peak of adults was from mid August to late September; the occurrence in citrus orchard in hilly and mountainous area was severe; the average insect-fruit rate in October reached 0. 20%-15. 88%; B. dorsalis had sporadic occurrence in other orchards. The integrated control measures of plowing in winter to kill pupae,removing insect-fruits,boycotting on the ground,trapping by sex attractants and spraying pesticides could basically control the damage of B. dorsalis.
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