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本项研究明确了玉米象的寄生性天敌米象金小蜂Ｌａｒｉｏｐｈａｇｕｓｄｉｓｔｉｎｇｕｅｎｓｉｓ（Ｆｅｒｓｔｅｒ）在山东省泰安地区室内变温条件下，一年发生５代，以老熟幼虫在寄主体内越冬。在２６～３２℃、相对湿度７８％～８５％时，完成一代平均１７．６ｄ。当每公斤虫粮有玉米象幼虫６００头左右时，分别接雌雄成蜂１０和２０对以上，２个月后的控害效果依次为７１．６３％和９０％以上。由此，提出了益害比为１∶３０的该峰保护利用指标。根据连续两代蜂不同密度（ｘ１与ｘ２）分别对玉米象控制后的残虫数量（ｙ１与ｙ２），组建了相关回归式：Ｙ１＝９８．４８２９－２．９１７７ｘ１；Ｙ２＝４４７．８１３６－８．２４０５ｘ２。为预测不同蜂量的控害作用提供了科学依据。
In this study, it was clarified that Lariophagus diversensis (Ferster), a parasitic natural enemy of corn, developed 5 generations a year under indoor temperature conditions in Taian, Shandong Province, and overwintered the host larvae in the host. At 26 ~ 32 ℃, relative humidity 78% ~ 85%, the average generation of a generation completed 17.6d. When there were about 600 corn larvae per kilogram of food, they were respectively exposed to 10 and 20 pairs of male and female bees. After 2 months, the control effects were 71.63% and 90% respectively. As a result, the protection and utilization index of the peak was proposed as 1:30. According to the numbers (y1 and y2) of the beetles after controlling the corn in different generations (x1 and x2) for two successive generations of bees, the correlations were established: Y1 = 98.4829-2.9177x1; Y2 = 447.8136- 8.2405x2. It provides a scientific basis for predicting the control of different bee populations.