不同玉米品种对截形叶螨种群参数的影响

在室内28±1 ℃条件下，应用叶盘法研究了中单2号、农大108、赤单202和巴丹3号4个不同玉米品种对截形叶螨种群参数的影响.结果表明,在不同品种玉米上，截形叶螨卵期、若螨期、产卵前期、成螨寿命、单雌产卵量、日均产卵量、净增殖率、周限增长率、内禀增长率、世代平均周期和种群加倍时间均有明显差异（P<0.05）；其孵化率为中单2号95.8%、农大108 94.0%、赤单202 90.0%和巴单3号84.0%；幼、若螨期存活率相应地为90.5%、84.0%、86.0%和72.0%；存活曲线均为I型净增殖率在中单2号上最高为41.4，而在巴单3号上最低为16.8；中单2号是其最喜食的品种，其次为农大108，再次为赤单202，对巴单3号的嗜食性最差.

Effects of corn cultivar on Tetranychus truncatus Ehara (Acarina:Tetranychidae) population parameters

The laboratory study at 28 degrees C showed that on four different corn cultivars, the durations of ovum, nymph and pre-oviposition, adult longevity, fecundity, egg production per day, net reproductive rate (R0), finite rate of increase (lambda), intrinsic rate of increase (rm), mean generation time (T), and the days needed to double population size (DDP) of Tetranychus truncatus were significantly different. The hatching rate on Zea mays cv. Zhongdan 2, Nongda 108, Chidan 202 and Badan 3 was 95.8%, 94.0%, 90.0% and 84.0%, and the survival rate on these cultivars was 90.5%, 86.0%, 84.0%, and 72.0%, respectively. All the survival curves were of Deevey I . The net reproductive rate (R0) was the highest on Zhongdan 2, and the lowest on Badan 3. The mite displayed a decreasing preference in order of Zhongdan 2 > Nongda 108 > Chidan 202 > Badan 3.