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研究明确了玉米象的寄生性天敌──米象金小蜂(Lariophagus distinguensis Foerster)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 17.6 天。当粮食中玉米象幼 虫虫口密度接近600/kg时,分别接雌雄蜂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的该蜂保护利用指标。根据连 续两代蜂不同密度分别对玉米象控制后的残虫量,组建了相关模型。即:Y_1=98.4829 -2.9177X_1;Y_2=447.8136-8.2405X_2。为预测不同蜂量的控害作用提供了科学依据。
The study identified that the parasitic natural enemies of corn, Lariophagus distinguishingis (Foerster), lived in the host for five generations a year under indoor temperature change in Taian, Shandong Province. At 26 ~ 32 ℃, relative humidity of 78% -85%, the average generation of 17.6 days to complete the generation. When the density of maize larvae in the grain is close to 600 / kg, the numbers of male and female bees are respectively 10 and 20 pairs, and the control effects after 2 months are 71.63% and 90% respectively. Therefore, the benefit protection ratio of 1:30 for the protection and utilization of the bee. According to the two successive generations of bees different density of corn on the control of the amount of residual worms, set up the relevant models. That is: Y_1 = 98.4829 -2.9177X_1; Y_2 = 447.8136-8.2405X_2. It provides a scientific basis for predicting the control of different bee populations.