《环境昆虫学报》

采用人工模拟降雨的方法研究了降水对棉花苗期朱砂叶螨校正虫口减退率的影响以及转移干扰作用，评价棉花苗期降水对朱砂叶螨种群数量的控制作用。结果表明，暴雨（49.59%±3.09%）、大雨（33.21%±2.46%）、中雨（37.25%±0.986%）和小雨（36.03%±2.69%）均能明显降低朱砂叶螨的校正虫口减退率，其中暴雨对朱砂叶螨校正虫口减退率的影响极为明显，显著高于大雨、中雨和小雨。而大雨、中雨和小雨对朱砂叶螨校正虫口减退率的影响两两之间无显著差异。随着降水量逐步增加，对朱砂叶螨数量由释放点向叶片正面和叶柄位置转移的干扰作用逐步增强。在释放点之间，大雨、中雨和小雨均对朱砂叶螨转移干扰作用不明显，但暴雨对朱砂叶螨转移干扰作用极为明显。

英文摘要:

Effect of simulated rainfall on interference transformation and their rectifying reduction rates of Tetranychus cinnabarinus was investigated with simulated rainfall method in cotton seedling, in order to evaluate the effect of simulated rainfall on dynamics of T. Cinnabarinus laboratory population in the Middle Reaches of the Yangtze River. The results showed that rainstorm(49.59%±3.09%), heavy rain (33.21%±2.46%), moderate rain (37.25%±0.986%) and light rain (36.03%±2.69%) significantly decreased the rectifying reduction rate of T.cinnabarinus. The rectifying reduction rate under rainstorm for T. cinnabarinuswas most significantly higher than that of heavy rain, moderate rain and light rain, respectively. But there were no significant differences among heavy rain, moderate rain and light rain. As rainfall capacity gradually increased, their interference effect on the quantity of T. cinnabarinus from release points (under side leaves) transfers to upper side leaves and petiole gradually increased. Interference effect on the quantity ofT. cinnabarinustransformation among those release points was unnotable among heavy rain, moderate rain and light rain, but there was the most significantly interference effect for rainstorm.

查看全文查看/发表评论下载PDF阅读器

关闭