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在实验室内以米蛾卵作寄主研究了蜂密度和寄主密度对玉米螟赤眼蜂寄生效能的影响.在第一个试验中,1、2、4和8头1日龄的玉米螟赤眼蜂雌蜂被分别接人400粒米蛾卵上,结果表明,卵的总寄生率在最高蜂密度(8头)时显著高于其他蜂密度,但平均每头雌蜂的寄生率却随蜂密度的增加而减少,当蜂密度从1增加到8头时,平均每头雌蜂的寄生率几乎减少了近一半,同时每雌产后代数也随蜂密度的增加而减少,说明蜂密度的增加降低了玉米螟赤眼蜂的寄生效能.另一试验中,50、100、200和400粒米蛾卵上分别接入1头1日龄的赤眼蜂雌蜂,结果表明,随寄主卵密度的增加,卵的总寄生率也显著增加,寄主卵密度每增加1梯度,每雌产后代数平均增加了2倍,由此可以看出,寄主卵密度的增加对玉米螟赤跟蜂的寄生效能有增强作用.
In the laboratory, moth moth eggs were used as hosts to study the effects of bee density and host density on the parasitism of Trichogramma ostriniae.In the first experiment, 1, 2, 4 and 8 1-day- The results showed that the total parasitism rate of eggs was significantly higher than that of other bee density at the highest bee density (8 heads), but the average parasitism rate per females was When the density of bees increased from 1 to 8, the average number of parasitism per females decreased by nearly half, while the number of females per females also decreased with the increase of bee density, indicating that the density of bees Increased the parasitism of Trichogramma ostriniae in another experiment.In another experiment, one 100-day-old and 100-month-old Trichogramma female were exposed to 50, 100, 200 and 400 moth eggs respectively. The results showed that with the host eggs The increase of density and the total parasitism of eggs also increased significantly. Each time the density of host eggs increased by 1 gradient, the average number of postnatal generations increased by 2 times. It can be seen that the increase of host egg density on parasitic Effectiveness has an enhanced role.