稀球果种蝇（ＬａｓｉｏｍｍａｉｎｆｒｅｑｕｅｎｓＡｃｋｌａｎｄ）是内蒙古根多河地区落叶松种子的重要害虫。该虫一年一代，以蛹在地被物下越冬，翌年５月初开始羽化，５月下旬产卵并出现幼虫，７月上旬老熟幼虫落地化蛹。害虫发育与温度和寄主物候有相关性：成虫羽化始期是由４月１２日算起有效积温达１４８℃的时期，日平均气温需达１０．５０℃左右；产卵始期日平均温度需达１４．５℃。成虫羽化与山芍药放叶，产卵始期与种鳞开张，幼虫老熟与种鳞硬化具有一致性。 LasiommainfrequensAckland is an important pest of larch seeds in the Geoduhe, Inner Mongolia. The insects of a year to pupa in the ground by the object of winter, early May the following year began to emerge in late May spawning and larvae, early July mature larvae landing pupation. Pest development correlated with temperature and host phenophase: The emergence period of adult pests is from 148 April when the effective accumulated temperature reaches 148 ℃, and the daily average temperature needs to reach about 10.50 ℃. The average daily temperature should reach 14 .5 ° C. Adult emergence and Hill peony leaves, spawning period and seed scales opened, larvae mature and seedling sclerotic consistency.