摘要:
为明确粘虫的生长发育、寄主选择性与不同玉米品种生化物质含量的关系,在室温24±1°C,RH70%~80%和光周期14L∶10D条件下,观察了粘虫实验种群在22个玉米品种上的生长发育、取食和产卵选择性,测定了22个品种中4种生化物质的含量.结果表明:粘虫在不同玉米品种上的发育历期和蛹重具有显著差异,但羽化率无显著差异.其中,幼虫至成虫发育历期最短的品种是黔单16,为26.14 d,最长的是8017,达29.36 d;取食安单3号的蛹最重,达346.84 mg,而取食品种7079的蛹最轻,仅298.71 mg.从化蛹率来看,取食黔单16的化蛹率最高,为93.33%,取食8021的最低,仅有66.87%.粘虫在不同玉米品种上的产卵和取食具有明显的选择性,尤为喜好在黔单16上产卵(5.67块·株-1)和取食(9.00头·株-1).不同品种间总酚、类黄酮和总蛋白含量差异显著,但总糖含量差异不显著.相关性分析表明,粘虫生长发育相关指标与4种生化物质含量无明显相关性,说明粘虫的生长发育与这4种物质含量无关.粘虫在22个玉米品种上的生长发育历期、存活及寄主选择性具有显著差异,但这种差异与不同品种间4种生化物质含量无关.%In order to clarify relationship between development, host choice of the oriental aryworm, Mythimna separata and content of biochemical substances in different maize varieties, the development duration, feeding and reproduction choice of this pest on 22 maize varieties was observed under the libaratory conditions of 25±1 °C, 70%-80% RH and a photoperiod of 14 L∶10 D, and content of four biochemical substances in 22 maize varieties were also investigated.The results showed that the M.separata exhibited significant difference in the development andpupa mass among tested corn varieties, but the eclosion rate had no difference.The development duration of larval+pupa was the shotest on Qiandan 16 variety (26.14 d), and the longest on 8017 variety (29.36 d).The heaviest pupa mass was observed on Andan 3 variety (346.84 mg) and the lightest was observed on 7079 variety (298.71 mg).The highest surval rate was found on Qiandan 16 variety (93.33%), while the lowest was found on 8021 variety (66.87%).The M.separata had obvious feeding and reproduction choice on different corn varieties, and this pest profered to reproduction (5.67 mass per plant) and feeding (9.00 pest per plant) on Qiandan 16 variety.Content of total phenols, flavonoids and total protein were significantly different among maize varieties, but the content of total sμgar was not different.Correlation analysis showed that content of these substances were not associated with development of M.separata.Development, survial and host choice of M.separata are obviously different among 22 maize varieties, which are not associated with the content of 4 tested biochemical substances.